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Don Day: “This Ain’t The Last Snowstorm This Season In Wyoming”

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By Ellen Fike, Cowboy State Daily

A snowstorm and cold front expected to hit southeastern Wyoming this weekend probably will not be the final blast of wintry weather for the season, according to Cowboy State Daily Meteorologist Don Day.

Day said Memorial Day weekend would have to come and go before Wyoming residents would be out of the woods when it comes to wintry weather, at least until the fall.

“If you’d asked me a week ago, I’d have said we were probably done with the hard freezes, but there’s another cold front coming in eight or nine days from now too,” Day said. “We’re near the end, but I’m not calling it done after this weekend.”

Thankfully, the snow won’t be too terrible this weekend, although Laramie and Rawlins will likely be hit the hardest by the storm, Day said.

Saratoga, Rawlins and Laramie will likely see “several” inches of snow over the next 36 hours, which will make travel on Interstate 80 difficult given slushy and icy conditions mixed with poor visibility. The mountainous areas in southeastern Wyoming will see anywhere from 6 to 12 inches of snow in the next few days Day said.

Day noted that Cheyenne is on a “precipice” of the snowstorm, meaning that if the storm shifts either north or south just a bit, there will be a difference in what the city sees in terms of snow.

However, Day did say the city likely will not be affected by snow as to cities like Laramie and Saratoga. Worst-case scenarios called for Cheyenne to receive 3 to 4 inches of snow.

“It’ll be a nice, wet storm in terms of bringing us water,” Day said.

There will be freezing temperatures on Thursday night through Friday, so Day warned anyone who might have gotten excited and planted tomatoes or flowers recently to get them covered to avoid death by frost.

“I’m going to have to go into witness protection after all of this,” Day joked.

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Don Day Special Wyoming Weather Update Saturday, April 23, 2022

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The following is a transcript of the special weather update by meteorologist Don Day.

As we take a look at what happened overnight and early this morning, basically we have no significant changes. 

There has been a slight southward shift to the storm. Just a slight one, but it’s all coming together, as expected. 

We’ve already had wind gusts of 66 miles an hour with heavy snow around Buffalo, Wyoming this morning.

Blizzard conditions will continue for northeastern Wyoming, southeast Montana, up the western side of North Dakota, and far western South Dakota. 

Now the heavy rain and snow is gonna get a little bit further south into central and east-central Wyoming and the Northern Panhandle. 

So with that southward shift some of the heavier snow a little bit further south and the wind is going to be bad with this system. Winds are going to ramp up over central northern and eastern Wyoming, southeastern Montana, the western Dakotas, western Nebraska, and the far northern parts of Colorado.

That’s going to just make for some very windy conditions with this heavy wet spring snow and that’s why the worst of it will be up in those areas that is listed. 

Now I do have a little bit of good news. Some of those thunderstorms that developed last night did bring rain to a few not many but a few areas of Kansas and Nebraska that really needed it last night. 

Satellite photos shows just a classic spring storm. You can see the circulation, the counterclockwise circulation around the low as it gets formed. 

This brighter cloud band here are the thunderstorms developing up here. 

But as we discussed in earlier podcasts, the flow of moisture is coming right up into the backside of the storm coming up from the south so the storm is well formed and really coming together and maturing. 

This is the latest update of winter weather advisories: The red is the blizzard warning. The blue winter storm warnings and winter weather advisories. The brown here is advisories for strong winds, high fire danger in this area here flooding here, everything but the kitchen sink and we’ll have severe weather out in the plains with this system later on. 

The low surface low is now over south central areas of South Dakota. And you can see how many black lines here, isobars very strong wind gradient wrapping around the backside here. 

So this is why we’re gonna have a lot of wind with the snow. The storm is going to move fairly quickly this way later today and tonight, but you can see how large it is. 

The large area of the storm is going to affect areas through today tonight into early tomorrow. Radar shows it very nicely. You may notice the hole here. Why is it not showing anything there? 

Well, not a really good time for the Rapid City radar to go down but that’s why no radar but there’s plenty going on here. Trust me, the radar just off right now. 

Here’s the latest forecast through tomorrow afternoon. So you can see the heavier precipitation in the areas we expected it but notice that little southward shift so that heavier moisture getting a little further south was not going to make anybody unhappy down here that really really needs the moisture but again, you get down to the Cheyenne area, northeastern Colorado, it’s a down slope there. 

As we have talked very good snow will be falling in the mountain ranges throughout the course of the day on the backside of this storm as well. 

But by far you can see the yellow and the oranges here. This is where the heaviest snow will be with the heaviest wind and you can see it right there. 

This is where the heavier snow will fall and there’s that little southern push right there. 

Last night I want to show you some cool satellite photos. This is from yesterday evening and you can see on the high resolution satellite an area of thunderstorms here in southwest Kansas. 

An area of thunderstorms developing here in parts of north central Nebraska thunderstorms up here in South Dakota as well. 

As the storm came over the divide yesterday evening. We did have some strong thunderstorms develop. Here’s I-70 in Colorado into western Kansas. Here’s Goodland, Kansas so you can see there was some needed rain that fell in winter wheat country with those thunderstorms last night.

Then those then move north into Nebraska. So the thunderstorms on the front end of the system did produce some needed rain last night but these areas still desperately need a lot more. 

Thanks for watching. Have yourself a good weekend. We’ll talk to you with the regular podcast on Monday.

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Very Strong Spring Storm to Impact Most of Wyoming

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By Jimmy Orr, Cowboy State Daily

A vigorous Pacific storm system moving into Great Basin Thursday night was expected to rapidly intensify into a strong storm over far southwest South Dakota on Friday night into Saturday morning, bringing heavy snow to most of Wyoming.

Forecasts suggested that the northern half of Wyoming will receive the heaviest amounts of rain or snow and cold temperatures. Only extreme southeastern Wyoming, including Cheyenne, will be spared bad weather, according to meteorologists.

Anyone with travel plans along Interstates 90, 25 and 80 or on secondary highways adjacent to those interstates can expect poor travel conditions by late Friday night that will continue through Saturday night. Conditions will also be poor in all of Wyoming’s mountain passes.

“There is strong consensus among the modeling that an intense storm will develop rapidly Friday evening and into Saturday, especially in the northeast corner of the state,” said Don Day of DayWeather, Inc.

“The model agreement combined with the fact that historically, April can bring intense storm systems of this type, gives us high confidence that storm will come to fruition,” Day said. “We expect as much as 1 inch to 3 inches of water content (rain and snow combined) will be possible with this storm.”

According to Day, Sheridan, Campbell, Crook, Weston and Johnson counties will receive the most precipitation, with some locations in those counties receiving very heavy snowfall. 

“Although the storm will start as rain, a change over to snow will be likely late Friday evening and will persist through Saturday,” he said. “I anticipate Sheridan, Campbell, Crook, Weston and Johnson counties may receive upwards of 6 to 15 inches of heavy, wet snow with Campbell and Crook counties most likely to have the heaviest snowfall outside of the mountains.”

The storm will mean another nice shot of snow for Wyoming’s mountains to boost the snowpack. Forecasts call for a foot or more of snow to fall over most of Wyoming’s high mountain ranges, with up to 2 feet possible in the Big Horns, Beartooths, Wind Rivers and higher Black Hills.

The Snowy Range and Sierra Madres are also in store for heavy snow accumulations with high water content. Elsewhere across the lower elevations, snow will accumulate, but mainly on the cold surfaces.

Moderate rain and snow amounts will be found across Park, Washakie, Big Horn, Fremont, Natrona, Hot Springs, Converse and Niobrara counties. There may also be a patch of heavier rain and snow from western Albany to Carbon to eastern Sweetwater counties along I-80.

Day urged ranchers to prepare for cold, wet and windy conditions that will be stressful to livestock from late Friday through early Sunday, especially in the northeast counties.  Expect a warm and breezy day on Friday with showers and thunderstorms developing rapidly late Friday through Friday evening.

“As with most Wyoming spring storms, there will be pockets of heavier snow in some areas, the track of this storm can bring heavy snow to parts of the Big Horn Basin, especially the Thermopolis area,” Day said. “This will be a nice shot in the arm in regards to badly needed moisture, especially for the northeast counties of the state as well as the state’s mountain ranges.”

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Cowboy State Daily Signs Exclusive Contract With Wyo Meteorologist Don Day

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By Jennifer Kocher, Cowboy State Daily

Formalizing the partnership that Cowboy State Daily has had with Wyoming’s preeminent meteorologist for more than two years, the news organization announced on Tuesday an exclusive three-year contract with Don Day.

For nearly 30 years, Day has provided his daily weather forecasts to more than 70 radio stations in Wyoming surrounding states.

This contract, however, ensures that the DayWeather podcast can only be accessed from one news organization, Cowboy State Daily. The podcast is available every weekday morning in the Cowboy State Daily newsletter and on Cowboy State Daily’s YouTube channel.

Jimmy Orr, editor of Cowboy State Daily, said the signing was significant because of how much Day signifies and represents Wyoming.

“There are only two voices in Wyoming which are known by literally everyone.  That’s Don Day and Wyoming Cowboys announcer Dave Walsh,” Orr said.

“For decades Day has provided the most interesting, in-depth, and fascinating weather reports,” he said, “He goes so far beyond typical weather forecasters as he takes the time to explain weather phenomena and why things happen in the weather world.”

“No one is better than Don Day,” he said. “Everybody knows that and we are thrilled to keep Day home here at Cowboy State Daily.”

Day said he was pleased to continue to working with Cowboy State Daily on an exclusive basis.

“DayWeather is excited about this partnership with Cowboy State Daily,” Day said. “I have been impressed with the rapid growth of Cowboy State Daily and their laser focus on all things Wyoming.”

“Cowboy State Daily is a great vehicle to communicate important and timely weather information to Wyoming residents who have to constantly navigate the whims of Wyoming weather,” he said.

Besides providing meteorological reports to Wyoming and the surrounding areas, Day is also a meteorological advisor to many clients including famed illusionist and endurance artist David Blaine, Red Bull Stratos Sky Diver Felix Baumgartner, the aerospace industry and others.

The DayWeather podcast can be watched every weekday morning in the Cowboy State Daily newsletter and Cowboy State Daily’s YouTube channel.

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Arctic Blast On The Way: Sub-Zero Temps Could Last A Week

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By Jimmy Orr, Cowboy State Daily

Wyoming residents should prepare themselves for the coldest and longest Arctic outbreak of the season so far this year beginning on Monday.

Wyoming Meteorologist Don Day issued a special weather statement on Sunday morning to detail the incoming cold front which could bring with it sub-zero temperatures for nearly a week in some areas.

Snow will accompany the cold air in some areas with areas along Interstate 80 likely to receive the heaviest of snow. But it’s the cold weather that has the meteorologist most concerned.

“We’ve had some cold weather at times this winter, but it’s never really lasted more than a day or two,” Day said. “This is going to last for five or maybe six days.”

Day said the conditions for livestock producers will be “very dangerous” at times and warned those in calving or lambing operations to be prepared for severe cold for multiple days in row.

The cold air will enter the state on Monday and by Tuesday nearly all of Wyoming will be enveloped by the Arctic air with temperatures in the from 20 below to 30 below being commonplace and the wind chill could bring temperatures down to 40 degrees below zero.

“By Tuesday morning, the upper level trough becomes more mature and the door to Canada opens up for Arctic air to spill into the state,” he said.

As a result, most of Wyoming will see sub-zero overnight temperatures for multiple nights in a row.

As for snow, areas in northern Wyoming could receive heavy snow from Sunday through Tuesday. 

Interstate 80 will be affected as a snow is expected in southern Wyoming from Monday afternoon through Tuesday morning with some areas of Sweetwater, Carbon, and Albany counties receiving more than a foot of snow.

“Interstate 80 is going to get hit hard with heavy snow, wind, and Arctic conditions,” Day said.

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Don Day: Parts of Wyoming Will Have White Christmas; Other Areas Will Be Dusty and Brown

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By Ellen Fike, Cowboy State Daily

The western portion of the state will probably have a white Christmas to some extent this year, Wyoming weatherman Don Day told Cowboy State Daily on Wednesday.

“First we have to define what a ‘white Christmas’ means,” Day said. “Does it mean there will be snow on the ground on Christmas day or does it mean it will be snowing on Christmas?”

For some parts of Wyoming, the answer will likely be both. From Wednesday night through Saturday morning, the area from Evanston to Rawlins will likely receive 2 to 6 inches of snow and the Jackson area will get anywhere from 9 to 13 inches.

“It’s going to snow for many days in a row in Jackson,” Day said. “But they’re kind of used to that, up in the mountains.”

The Interstate 80 corridor of southwestern Wyoming is probably the best area to see falling snow this Christmas Eve and day, Day said.

The rest of the state will probably not have the stereotypical white Christmas, seeing little or no snow on Christmas Eve or day this year. Day said there is a 50-50 chance the northeast portion of the state, such as Sheridan and Gillette, will see measurable snow. The chances are the same for the Douglas and Casper areas, Day said.

Laramie will likely see some snow this weekend, and the National Weather Service issued a winter storm warning for the Snowy and Sierra Madre regions. The expected snowfall in the area could be anywhere from 5 to 8 inches.

Cheyenne, on the other hand, probably won’t have any snow on Christmas. Day noted that this isn’t uncommon, as a study he conducted on snowfall in Cheyenne revealed there was only about a 24% chance it would snow on Christmas in any given year.

“The statistical opportunity for it to snow on Halloween in Cheyenne is actually higher than it snowing on Christmas,” he said.

For anyone who is hoping for a white Christmas in any part of Wyoming, Day joked that he was trying his best to make it happen.

“I’m keeping my fingers crossed for a white Christmas because I’m a purist,” he said. “I’m putting in those extra hours to make sure it snows on Christmas, but stays off the roads.”

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Wyo Weatherman Don Day Featured In WWII Documentary About Japanese Balloon Bombs

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By Ellen Fike, Cowboy State Daily

Wyoming meteorologist Don Day will appear in a Discovery Plus documentary debuting this week about a little known attack on the United States involving balloons in World War II.

Yes, balloons. They don’t seem scary, unless you’ve read the Stephen King novel “IT,” but the Japanese actually used them as weapons during WWII.

Day will appear in the “Great Balloon Bomb Invasion” documentary, which will launch on the Discovery Plus streaming service on Thursday.

“I got a phone call from a balloon pilot friend in Pennsylvania who I’ve worked with on a lot of projects, and he told me he got a call from a production company and they had weather questions about how these guys could get balloons across the Pacific,” Day told Cowboy State Daily on Monday.

Between 1944 and 1945, the Japanese military launched more than 9,000 bomb-rigged balloons across the Pacific, counting on the wind to carry them over American soil, where they could cause damage.

About 300 of the balloons were found in the United States and one was blamed for the deaths of six people in Oregon. Some of the devices were found in Wyoming.

There were eight confirmed Fu-Go balloon bombs found in Wyoming near Thermopolis, Basin, Manderson, Kirby, Powell, Glendo, Newcastle and Gillette.

Day said there were also unconfirmed sightings of balloon bombs near Cheyenne and Fort Collins, Colorado.

One bomb exploded near Thermopolis in December 1944, creating a crater, according to a document from the Smithsonian Museum provided by Day.

The Wyoming weatherman noted that the Japanese intended to use the bombs more for psychological warfare than as truly devastating weapons. However, the United States kept the bomb sightings under wraps, mostly to keep people from panicking.

“By keeping it under wraps, it kind of nullified what the Japanese were trying to do, because it was really terrorism,” Day said. “They’re trying to freak people out, start forest fires and create an environment where you can’t feel safe.”

In the documentary, Day and another meteorologist run a computer simulation to determine where in the United States the balloon bombs might have fallen, as he believes about a third of the 9,000 balloons actually made it the U.S.

Unfortunately, he could not say what conclusions they reached, but said all would be revealed in the documentary.

“I will say, when I go out in the woods now to hunt or hike and I see something that looks like old mining equipment, I’m looking at it completely different,” he said.

There are likely still balloon bombs in the wilderness all across the western United States, particularly in Wyoming, Montana, Idaho, Washington and Oregon, and it is very possible they are still active.

“Be careful out there,” Day said.

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Don Day: Aurora Borealis Will Be Visible Thursday Night, Other Times This Winter

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By Ellen Fike, Cowboy State Daily

The aurora borealis will be on display for people in northeastern Wyoming on Thursday night, according to Wyoming weatherman Don Day.

Basically, anyone along Interstate 90, which runs in Wyoming from Sundance to through Sheridan and into Montana, has a chance to see the northern lights on Thursday night, once it gets “really dark,” Day said.

“A new solar cycle is starting, which means more sunspots and more potential for flares and coronal mass ejections (large expulsions of plasma and magnetic field from the sun),” Day told Cowboy State Daily on Thursday. “So the likelihood this winter and the following winters of seeing it are better and better.”

Despite predictions that the northern lights would be especially visible over the weekend, sightings were not as widespread as expected. However, photos from Sundance and the Devils Tower area have popped up on social media over the last 24 hours, with some residents and travelers capturing stunning photos of the aurora.

However, the further south someone is in the state, or the larger they city they live in, the less likely they are to see the lights, Day said.

“Only in really strong events will you be able to see the lights in the city,” he said. “It’s happened. I was in Laramie in the late 1980s and you could literally see it, but right now, your best bet to see them is to get away from city lights.”

Meaning people in Cheyenne and Laramie are probably not going to see the lights (at least on Thursday) unless they want to head north.

Day also said that anyone who has a digital camera and wanted to photograph the lights should be sure to have a tripod and to turn on their long exposure settings.

Those who are looking to take a photo of the lights with their cell phone can try out a couple of applications, but again, Day said the key is long exposure settings and a tripod so the camera won’t move.

After Thursday, Day said the lights likely won’t be as visible, if at all, in the northeastern portion of the state until the next solar event, which can’t be predicted.

“The stars have to line up, so to speak,” he said.

However, he did recommend anyone interested in tracking the lights’ visibility use the website spaceweather.com, which he also uses, since it is updated daily.

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Meteorologist Don Day: Media Outlets Writing “Climate Click-Bait” Stories Use Well-Known Formula

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By Ellen Fike & Jimmy Orr, Cowboy State Daily

Meteorologist Don Day, often referred to as “Wyoming’s weatherman,” wishes news outlets were more selective about the data they use to write about the weather.

Day, responding to a recent story about the use of air conditioning in the Rocky Mountain West, said while the story claimed temperatures are steadily growing warmer, it offered no data to back up the assertion.

“Most climate news stories are like this, heavy in anecdotes and light in any data,” said Day, the founder of DayWeather.

The story reported by Wyoming Public Media referred to warm weather in some areas, citing Sheridan as an example, but Day said it offered no hard data to back up the assertions.

“June and July were hot, but did not break records, as it was hotter in 1988 and 2007,” Day said. “August in Sheridan was cooler than last year and 2019. It is really easy to cherry pick weather data to prove hot or cold.”

He added that while October 2019 in Sheridan was the coldest on record, that fact is not evidence of global cooling.

“There is really no hard weather data in the story, a few references to some hot days, but no long term data trends provided,” he said.

Day said “climate click-bait” stories follow a formula with six main points:

  1. Shocking headline.
  2. Claim that recent observed weather is the worst ever recorded, likely using cherry-picked or misleading data.
  3. A quote from a scientist who likely is not in atmospheric science and says this is worst and more is to come.
  4. Quote from another article or link to a paper some environmental group has written.
  5. Another claim of impending doom.
  6. There is time to change all of this, we can change the weather if we only change our ways, there is hope but only if you do what we say.

“You will see this pattern over and over again the media/press, watch for the pattern,” Day said.

Day said peoples’ perception of what they see in weather is frequently based on what they are experiencing now instead of looking back to get a historical perspective.

“If I had a dime for every time I saw a news story that said ‘this was the worst ever’, I’d be rich,” he said comparing the hyperbolic coverage of Hurricane Ida to past hurricanes.

“This was nothing like Hurricane Camille or many of the hurricanes in the late 1960s or the 1970s, but the perception is this was the worst hurricane of all time,” Day said.

Camille was the strongest landfalling tropical cyclone recorded in the world, and one of only four tropical cyclones worldwide ever to achieve wind speeds of 190 mph. Camille killed 259 people and cause 1.42 billion dollars in damage in 1969 dollars.

Day said reporters will oftentimes interview people who offer personal anecdotes and then frame their stories as evidence of another sign of manmade climate change and “we are destroying the climate.”

“We’ve seen these weather patterns before, we’ve seen them in the 1940s and 1950s but that’s all forgotten,” he said.

Also ignored by most of the media, Day said, was the lack of tornados this year. Through June of 2021, the total tornado count is the lowest since the 1950s.

“I could put out a press release this year stating that this was one of the least active tornado seasons ever and blame it on climate change but no one would cover it,” Day said. “Because you can’t associate something positive with climate change, it has to be the end of the world.”

Day said he’s not denying that human activity may impact the climate. He describes himself as a “climate realist.”

“Yes, human related emissions may have played some role in warming over the past few decades,” Day said. “However, politicians, media, and environmental groups constant mantra that every major weather event is somehow the result of human activity is intellectually dishonest.”

“The weather and climate we experience is also driven by numerous variables that do not include greenhouse gases that we have absolutely no control over. You can point your finger at human activity and greenhouse gases till the cows come home but it is not the whole climate story,” he said.

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Desert Heat Invading Wyoming; Long-Term Forecast Dismal

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Wyoming’s weatherman Don Day on Friday said Wyoming is about to get a blast of desert heat and the long-range forecast for precipitation is not looking good.

Day, in his morning podcast, said a dome of high pressure is moving into the state from the desert southwest and that will “open the floodgates” for desert heat.

“What will happen is kind of like an accordion,” Day said. “Underneath this area of high pressure is a lot of very, very warm air. And, this high pressure Ridge will build and expand and then it will sometimes contract.”

Day said there is a large part of North America – which includes Wyoming – that’s going to be hot for a an extended time along with sparse precipitation.

“These temperatures are really amazing. The heat gets all the way to Nova Scotia, and back down into Mexico,” he said.

He did say there would be some thunderstorms this weekend but they would like produce little rain but lots of wind.

Day said if the European weather prediction model is correct, expect hot temperatures with little rain all the way through July 4.

He said the weather pattern is similar to what Wyoming experienced during the summer of 2012.

“So after what was a pretty good May for a lot of you, the next 30 days is not terribly optimistic,” Day said.  “Were going to have hot and dry conditions at least for the first couple of weeks of June.”

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Don Day: Prepare to Be Annoyed, Miller Moths Are Coming Back

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By Ellen Fike, Cowboy State Daily

Don Day walked into his office on Monday and was hit in the face by a miller moth.

On one hand, he was grateful, because they seem to late in hatching this year to annoy Wyomingites. On the other hand, they’re back.

Although Day isn’t a bug expert, he did tell Cowboy State Daily he thinks the moths are hatching later this year due to the colder spring the state and western U.S have been experiencing.

“From my very unscientific study so far, people around the state are just beginning to see them hatch,” he said.

The miller moth is the adult stage of the army cutworm, which is common in Wyoming and surrounding states. The moths are attracted to certain types of light, as they use the moon and other celestial lights to guide them on their flights.

Since Day just saw his first moth on Monday, he has been asking listeners of his weather podcast to send in reports of their miller sightings to podcast@dayweather.com. This week so far, he’s heard reports of miller sightings from Lander, Thermopolis and Fort Bridger.

“Usually it’s the end of May and into June when they’re coming around, but it does seem a little later this year due to the cool weather we’ve had,” Day said.

He couldn’t say whether Wyoming and other western states would experience the massive influx of moths like last summer, though. Day noted some of the other large invasions of moths occurred in 1991 and 2002, so maybe Wyoming will be lucky enough to avoid a major infestation this year.

Thankfully, the moths are just annoying, not destructive.

Day said he set up a moth trap last year that consisted of a bucket of soapy water placed next to a single-bulb lamp. The moths will be attracted to the light and then fall into the soapy water, where they will ultimately die.

“We were having a body count of 15 to 30 a night,” Day said. “I think they’re so annoying because of the volume and they’re so sneaky. You can do everything to keep them out, and then you’ll find some inside your house.”

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Don Day Wyoming Weather Forecast: Monday, March 22, 2021

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Don Day Saturday Morning Snowstorm Update: “This Is A Dangerous Storm, Don’t Mess With It”

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Wyoming’s weatherman Don Day on Saturday morning said nothing has changed and the much-anticipated winter storm to affect large portions of the state is on track.

Day, in special edition of his daily weather podcast, said although the bullseye of the storm is in east-central and southeastern Wyoming, other parts of the state from Green River to Lander to the I-90 corridor will be affected as well.

“We went through a checklist earlier in the week where you had to have all the right things come together, all the right pieces of the puzzle to have a really big storm like what’s been being advertised this weekend. All of that’s coming together,” Day said.

In the bullseye areas, two or more feet of snow can be expected while his maps show areas outside of the bulleye to receive anywhere from eight to 21 inches.

“Look at Nebraska and east central and southeastern Wyoming and the Front Range of Colorado, there’s going to be a tremendous amount of water available,” Day said pointing to his maps.

And that’s not at all. Wind is going to be a factor too.

Wind gusts of more than 50mph are forecast in the bullseye areas of southeastern Wyoming, east-central Wyoming, western Nebraska, and northeastern Colorado.

Day cautioned people not to get complacent just because it’s relatively calm on Saturday morning – at the time of his recording.

“Even though there’s really not much going on right now at the time of this podcast here Saturday morning, things deteriorate extremely rapidly in these situations,” he said.

“So things can change on you, don’t test your luck, if you’re gonna go out and drive a long way, hoping to beat it. Because this system is coming together,” he said.

What’s interesting about this storm is that nearly its entire lifespan will happen right here in Wyoming, Colorado, and Nebraska.

“This is typical in these high plains Rocky Mountain big snowstorms is that the storm actually goes through its whole lifecycle right on top of us,” Day said.

“And that’s where you tend to get these big, big snow events. As the storm develops, goes through its whole maturity process. It gets really strong and then it begins to dry out and dissipate as that dry wedge gets pulled in and very typical for that to happen,” he said.

The video of Day’s podcast can be viewed here.

The rough transcription of Day’s podcast follows:

——————————————-

Good morning, and welcome to Saturday, March 13 2021. Here’s a special weather update podcast for everybody. Thought we would get up this Saturday morning and see if the overnight hours would change our mind on the storm. 

Well, they didn’t. This is going to happen, folks. 

As we discussed yesterday, confidence was getting really high, our computer modeling was was getting lined up being very consistent. 

And we went through a checklist earlier in the week where you had to have all the right things come together, all the right pieces of the puzzle to have a really big storm like what’s been being advertised this weekend. All of that’s coming together. 

This is a parent based on all the latest information. Southeast and east central Wyoming and western Nebraska and Northern Colorado will be in the bullseye of this storm. 

That’s where the heaviest snow is going to fall in those areas along I 25 and Interstate 80. Out further on the plains, it will be a major winter storm as well. 

But there’ll be rain at first and that’ll cut off some of the heavier snowfall amounts. 

Now for you folks like that i 90 corridor, you remain on the far northern edges of the storm and if the storm wiggles a little more north, you’re going to get into the snow, if it stays on its current track or goes a little more south, you’re just going to get brushed by it. 

The I 90 corridor is kind of the boundary of where this storm is going to be impactful. The worst conditions will be Saturday afternoon through early Monday, that’s when everything comes together. 

Now a lot of areas are in some freezing drizzle and fog this morning. So we’ve got a thin glaze of ice in many areas east of the divide this morning and East in the mountains.

 That’s going to put a thick layer of ice in some areas with this, which is snow is going to fall on top of.

High impacts: obviously for travel and livestock through Monday, this is a dangerous storm. Don’t mess with it. 

Even though there’s really not much going on right now at the time of this podcast here Saturday morning, things deteriorate extremely rapidly in these situations. 

So things can change on you, don’t test your luck, if you’re gonna go out and drive a long way, hoping to beat it. Because this system is coming together. 

As of this morning, the upper level low was about where all the models have been forecasting it to be just north of Page Arizona, drifting very slowly to the four corners area. 

And that’s where it is this morning. It remains cut off from the main jet stream, it’s extremely well organized, a high pressure in the Gulf of Mexico. 

All of those pieces we’ve been showing you throughout the week have not changed. They’re all there. So the flow of moisture from the Gulf of Mexico was coming. 

Now here is a satellite and radar image. This is a radar image just taken. So you can see actually see this ring of moisture. It’s right around the upper level low right here near Lake Powell.

And here’s that fetch of moisture coming up from the Gulf and all over the eastern plains and into here. 

Over the last couple of hours, we’ve had lightning strikes in northeastern Colorado and Southeast Colorado in northeastern New Mexico seeing some thunderstorms. 

So the instability of the lifting of the atmosphere from the low here is happening as advertised.

Now this moistures got to get drawn in and pulled up here like this. And that’s going to be happening over the next six hours. 

As we get into Sunday. This is for noon, Sunday, the upper level low is in southeastern areas of Colorado, very well formed low, extremely deep upslope winds to 30,000 feet getting driven into the northern Front Range of Colorado, southern Wyoming and into western Nebraska.

And the feed of moisture is uninhibited. Yes, there’s going to be some thunderstorms, and that will take away some of the moisture, but the moisture is thick and deep. So even with thunderstorms, we’re still gonna have a lot brought back to the Front Range.

This system here will act as a kicker. So the storm will get pulled out of the area, beginning very late Sunday night into Monday morning. 

So this is really going to be about a 42 to 48 hour event all together. 

When you take a look at where the surface low pressure will be. It’s going to be right in the southeast Colorado, Oklahoma, Texas Panhandle area right here. 

And this is a pressure gradient. These are surface pressures. And you can see the lineup of the surface pressures from west to east here. 

And that’s where the wind follows. So the upslope is very, very deep at the surface all the way up to basically where you fly in a commercial jet really high into the atmosphere. 

And if you just imagine the amount of lift that takes place, from the moisture that’s brought from the gulf and the planes that are much lower and altitude and lift it to our higher altitudes here that just generates a lot of lift and a lot of the right physics to create snowflakes to cause precipitation to cause the atmosphere to cool to create the machine that the storms become. 

These are the latest updated snow forecast and precipitation totals I’m showing you the latest projection of total precipitation through early Monday and you can see there along the front range for South of Denver, up to Cheyenne up to Casper back to Lander, all of that orange, anything that’s orange is two inches or more, the darker red, you’re getting over three inches. 

Again, this is a prediction. Notice there is less here and I’m going to show you here on the simulated stat satellite. 

Why there’s a little wedge here of drier air, that’s going to lead to less precipitation amounts there, which is too bad. This is going to be great moisture. But I wish they would get a little bit more here. 

But look at Nebraska. And look at East Central and southeastern Wyoming and the Front Range of Colorado, there’s going to be a tremendous amount of water available. 

And when we convert that to snow, due to the fact that temperatures aren’t terribly cold, it’s going to be about a 10 to one ratio on the plains meaning one inch of water is going to mean about 10 inches of snow.

It’s going to start as a very wet snow then get drier as we go on. But all the areas in blue and pink and purple are where you’re going to see the snow accumulate the purple and the gray here in southeast and East Central Wyoming definitely showing the bull’s eye.

Really there’s two bullseyes and a lot of these are terrain induced due to the higher terrain getting lifted up along the slopes of the mountains and the foothills. 

We had mentioned yesterday that there’s going to be a bit of a snow shadow west of the major mountain ranges. 

There’ll be a bit of a snow shadow into Walden, a little bit of a snow shadow west of the Laramie range and snowy range mountains and the mountains – you see this hole right here in northwestern areas of Colorado where that mountain flow, that flow of air from the east is going to take away a lot of the moisture on the eastern side of the mountain.

 So the western side of the mountains aren’t going to get as much nonetheless, there is so much moisture and energy going to get over the divide, you can still see there’s going to be precipitation getting into western Colorado, southwestern areas of Wyoming and even eastern Utah as well. 

Wind is going to be a factor. These are the forecasted wind gusts with the storm and we have this area of really strong winds up here in Nebraska, southeastern areas of Wyoming in the northern Colorado. 

You’re going to have sustained winds 20 to 30 gusting 40 to 50 miles an hour or more in this area, so that will cause blizzard conditions. 

We’re also gonna have high winds blowing snow and blizzard conditions near South Pass and also in Sweetwater County and east central parts of Sweetwater and Carbon County.

This is going to be what’s called a gap wind, where the wind gets pushed through the mountain terrain and the gaps in the mountain ranges. 

So we’re gonna have a lot of wind on I 80 right here with the snow as well. And then on the bottom side of that low, strong winds impacting New Mexico today, tonight and into early tomorrow. 

So this storm folks has everything. 

Here’s the simulated satellite photo, I showed you this yesterday. This is kind of fun. 

This shows you what a satellite photo should look like by noon tomorrow. And as you can see, we have the long fetch moisture getting drawn into Wyoming and Colorado. 

You see the curl, where the upper level low is going to be the counterclockwise spin around there. 

And also notice and I talked about this earlier you see that dry wedge right here. 

The storm is so strong, the counterclockwise circulation brings drier air into the storm out of Mexico and the desert southwest and brings it in. 

So you’re gonna see a clearing out here in western Kansas, right here during the day tomorrow and into tomorrow night. 

And what will happen is, this pocket of dry air will get pulled into the storm Sunday night into Monday effectively causing the storm to reach its peak and dissipate as it drifts off to the north and east it will not be nearly as strong. 

So what happens and this is typical in these high plains Rocky Mountain big snowstorms is the storm actually goes through its whole lifecycle right on top of us. 

And that’s where you tend to get these big, big snow events. As the storm develops, goes through its whole maturity process. It gets really strong and then it begins to dry out and dissipate as that dry wedge gets pulled in and very typical for that to happen. 

So folks, there’s no turning back. Hopefully you can get through everything. Okay, thanks for listening and watching the day weather podcast. And we’ll see you on Monday. Might have a special update for you tomorrow morning. If we see any changes. Good luck with the storm and be prepared

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Don Day: Slow Moving Snowstorm Is Going To Happen, Really Impressive Amounts of Snow

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Wyoming’s weatherman Don Day said nothing significant changed overnight that would alter the forecast for the big snowstorm that is heading toward our state over the weekend.

Day, in his daily morning forecast, said parts of Wyoming are still on tap to receive many feet of snow.

The only thing that has changed since yesterday is the speed of the storm. It’s slowing down a bit. 

That means peak activity won’t happen until Saturday afternoon instead of Saturday morning.

“Be patient, it’s gonna take a while this is a really slow mover,” Day said.  “It’s going to be the latter part of Saturday and Saturday night when the storm starts to get real western.”

Day said he was still uncertain about how much of the storm will hit northeastern Wyoming. 

“To the folks living along Interstate 90, from Sheridan to Buffalo to Gillette, to Sundance on the way to Rapid City, you’re on the northern fringes, where a slight change in the track of the storm will make a big difference,” Day said.

The bullseye, he said, continues to be southeast, east central Wyoming, and northern Colorado.

In an interview with Cowboy State Daily on Thursday, Day said the Centennial area, the Laramie summit and the foothills of Wheatland and Douglas could see the largest amounts, mentioning that 2 to 5 feet of snow is possible.

Cheyenne, Wheatland, Torrington, Casper, and Lusk could all receive between 12 and 24 inches of snow, with higher amounts a possibility.

“Snowfall amounts may be a little shorter than the 2003 storm but the total snowfall of the 2003 storm is hard to beat. But we’ll come close, we’re gonna have some really impressive snow,” he said.

He also said some of the forecasted amounts might be a bit excessive mentioning a computer model showing Wheatland receiving 34 inches but only time will tell.

Don’s complete weather forecast can be viewed here.

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Don Day Weather: Huge Snowstorm Expected; Up To Five Feet West of I-25 Corridor

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Wyoming’s weatherman Don Day is predicting a massive snowstorm to hit Wyoming over the weekend, with the Interstate 25 corridor predicted to see the most snow.

Computer models, he said, are “all over the place” in predicting widely differing snow amounts but one thing is certain: snow is coming.

“The storm is going to happen. Our confidence level is very high. All of the ingredients are there,” Day told Cowboy State Daily.

The amount of snow and the exact locations are still in play but Day said the Centennial area, the Laramie summit and the foothills of Wheatland and Douglas could see the largest amounts, mentioning that 2 to 5 feet of snow is possible.

He said Cheyenne, Wheatland, Torrington, Casper, and Lusk could all receive between 12 and 24 inches of snow, with higher amounts certainly a possibility.

“Our computer modeling is showing tremendous amounts of moisture with this storm,” he said. “Some models are showing 3 to 6 inches of water content. If you convert that to snow, that is a tremendous amount of snowfall.”

Most areas of the state, he said, will be affected by the snowstorm, and he specifically mentioned Rock Springs, Green River, Rawlins, Lander, and Riverton as some of the areas that will be hardest hit.

He said the Jackson area, Star Valley, Pinedale, and the Cody area will miss the storm completely.

As for the timing, Day said the peak of the storm will occur on Saturday and continue on until Sunday morning.

What everybody wants to know now, however, is how much snow will fall and exactly where. 

Patience, he said. By Friday morning, he’ll know much more.

“Now that the storm has moved inland to the coast, we can start measuring it with weather balloons and other sensors,” he said. “By Friday morning, we’ll have a better idea about the amounts to expect and the exact track of the storm.”

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Many Wyoming Towns Never Went Above Zero on Thursday

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Thinking it’s cold where you are?

Try being in Powell, Wyoming today. It’s high? -15 degrees.

Buffalo and Cody were right behind chalking up highs of -13 degrees while Gillette posted a high of -11.

Greybull, Cowley, Worland, and Casper at least were in the single digits below zero with highs of -7, -6, -5, and -4 respectively.

This is all part of a big Arctic front that is finally pushing a Pacific front out of the way.

The two fronts have been battling over the last week and now it looks like the Arctic blast will win out and in a big way.

That’s something that impresses meteorologists. Take Wyoming’s Don Day, for example. He’s been pretty bored over the couple months as Wyoming has been unseasonably warm and dry.

“This is a huge Arctic outbreak,” Day said. “You don’t normally see them with such extent like this east to west. So that is something that is quite impressive.”

“The thickness of the Arctic air vertically also is pretty impressive,” he said. “It gets very deep — thousands of feet deep.”

Be forewarned, Wyoming — especially eastern and central Wyoming — that dangerous wind chills are heading our way. Negative 40 is not out of the realm of possibility.

For the most comprehensive weather information, check out Don Day’s forecast on our YouTube channel.

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Don Day: Life-Threatening Cold Temperatures Ahead; Wind Chills 40 – 50 Below

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It’s really, really cold out there.

Cold enough for pants to stand upright by themselves? Yes, it’s that cold.

The frozen jeans you see pictured were placed in Ton Winter’s front yard in Wheatland.

Those pants won’t be thawing out any time soon with at least four days of sub-zero weather facing that community.

Places like Gillette, Wyoming are really getting it.  The high on Thursday will be 11 below zero. Sheridan and Sundance will top out at 9 below zero. While Casper will make it all the way up to 2 below.

To show you how crazy Wyoming weather is, the icebox of the nation — Big Piney, Wyoming — will hit a balmy high of 33 degrees on Thursday. Pinedale, normally another super chilly spot, will see a high of 28, while Bondurant will make it to an even freezing.

This is all because, if you’ve been listening to Wyoming weatherman Don Day, there’s been a battle going on between the Arctic Pacific fronts.

When the Pacific front moves in, it warms up. When the Arctic front pushes the Pacific front out, it cools down.

And there’s been a dividing line between the two fronts. Western Wyoming is warmer while central and eastern Wyoming are really cold.

That’s about to change. In Super Bowl terms, the Arctic front is Tom Brady and the Buccaneers and they are about to dominate the Pacific.

That means the entire state is going to see an Arctic blast — the likes of which we haven’t seen in over a year.

“We’re expecting a push of Arctic here to get deeper get, let’s say a mile thick as we get into the Friday through Sunday timeframe, and we’re gonna see most of the state go below zero,” Day told Cowboy State Daily.

“These are really dangerous conditions,” Day said. “It’s been a long week for livestock and it’s about to get a lot longer.”

Day said the weekend will be especially cold in Wyoming not only because of the temperatures but because of the winds.

“Wind chills at 30 – 40 degrees below zero — or even colder in northeastern Wyoming — will occur this weekend,” Day said.

“The temperatures may not be record-setting but they’re getting really, really close to being record temperatures,” he said.

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Don Day Weather Forecast: Monday, January 18, 2021

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The following is a rough transcript of Don Day’s Wyoming weather forecast for Monday, January 18, 2021.

Welcome to Monday, January 18 2021. Thanks for tuning into the day weather podcast. Well to start the week we’re going to have a system and to end the week we’re going to have a storm system. But in the middle, well not much going on. 

So it’s like a sandwich with no meat in the middle. We got bread on top today, bread on the bottom by the weekend, but very little meat in the middle. But the pattern is getting more active. 

Arctic air is still not able to move in yet. This is typical in a La Nina pattern for arctic air to have a hard time getting pushed south, even though there are a lot of large scale hemispheric suggestions that it will come in. 

But the model still doesn’t see it quite yet. Although it will be trending colder by the weekend. 

This is the strongest lining and going back to 2010 to 2012. So it’s something that is definitely dominated pattern. I know you’re probably tired of me talking about La Nina but to use a sports analogy, it’s flooding the zone.

It is completely dominating the pattern for the western United States and parts of the central US and the far west. It’s just completely taken over. 

And the pattern that we’ve seen so far this winter is definitely a classic La Nina, speaking of La Nina here are the sea surface temperatures. 

As we look, we see all the blue and the subtropical Pacific. Also notice the Northern Pacific is starting to get colder as well. And I’ll show you the sea surface changed since November. And some really interesting things are showing up. 

We’ve got this warm pocket down here. But that’s not going to really influence our weather. It’s all about this area really right here. And also what’s developing up here, that will continue to impact our weather here for the rest of the winter season. 

If you were to measure the heat content of the upper ocean, in the key area of the subtropical Pacific at that longitude, you can see that since April, that’s when things started to turn dry. 

Last April, May in June is when the western states started to dry out. And we saw that the sea surface temperatures which they normally do warm up a little bit right at the peak of summer. 

But look at the heat content of the subtropical Pacific since then, and it’s very, very low. So we’re putting very little heat into the atmosphere compared to normal, also less water vapor into the atmosphere because of the La Nina.

If you were to look at how sea surface temperatures have changed since November 13. Now notice there’s actually been a slight warm up in the subtropical Pacific since November. But they’re still as we just showed you in the map. They’re still colder than normal. 

But look at this. Look at the North Pacific and then along the California coast, the sea surface temperature since November have dived. And this is something that we saw in 2011 and 2012. 

That’s why we’re so concerned, getting more and more concerned about the dryness continuing this summer in the western United States, because this is exactly what happened with that strong La Nina about, about 10 – 11 years ago. 

And again, I’ll say this, again, these La Ninas that are bad tend to be at the bottoms of solar minimums, which is what we just got through. So again, there’s no surprise on what’s happening. 

Now let’s take a look at how the weather pattern evolves in the short term. This is where we are today. We’ve got this broad trough coming in right here. 

It’s not really well organized. But we did see some nice snow in the mountains of Wyoming and Colorado and parts of Montana, Idaho last night, and we’ll see some more up in the high country and a few snow showers in the plains. 

But look what happens with this broad area of low pressure. It splits with a piece headed to the northern plains and this piece dropping Southwest into southern California. 

This is again, something that happens a lot in La Nina seasons because the Jetstream winds are so strong. Then as we go further out, this is Wednesday, we end up with a low off the coast of Southern California. 

Now this is bad news for California. Now I know that we don’t have many podcast watchers in California right now, but you’ll probably be hearing about this on the news. 

So we’re giving you a heads up when you get a low that drifts off the California coast like this in winter, you tend to have a big surface gradient of high pressure in Utah and low pressure there so the air moves this way. 

This is a classic Santa Ana. So what will happen is all of a sudden you get really worried really fast about the fire danger in California. 

If somebody gets a fire started in the Santa Ana. Well, it’s bad news is you get these strong easterly winds. 

And you can see it Southern California poised to have 50 – 60 mile per hour wind gusts or more with the Santa Ana developing this week. 

Now as we get into the weekend, that low off the west coast gets pulled in. We have another trough coming on in and we see a general broad area of low pressure for this weekend, and that’s going to lead to better chances of snow and colder weather in the Intermountain West. 

Now whether or not it’s a big organized storm well put together we’ll just have to see and we’re also going to be seeing small weather disturbances coming off the Pacific, Thursday night and Friday, bringing the mountains some snow here and a few snow showers to the plains. 

So we’ll keep an eye on the weekend. The weekend could produce more in the way of snowfall and if we were to look through Saturday afternoon, you can see at least the computer modeling is showing an enhanced chance of snow coming back into the northern and central Rockies along with some colder temperatures for the weekend and into early next week. 

Thanks for listening to watching the day weather podcast. Have a great Monday. Talk to you tomorrow.

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Don Day Wyoming Weather Forecast: Wednesday, December 30, 2020

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This is the Don Day Wyoming weather forecast for Wednesday, December 30, 2020

Below is a rushed transcription of Don Day’s forecast. Excuse the errors.


How is the year going to end? And how’s the New Year gonna start? Well, really not bad. It’s gonna be windy and occasionally chilly. 

We’re gonna have some wind today, and into Thursday, we’ll have some wind again over the weekend. 

But really, there’s nothing terribly bad coming our way other than the wind and chilly temperatures, but at the same time, we still don’t have any bitter arctic air to come on in. 

We’re gonna have a few fast moving systems mainly impacting the mountains, we will see some wintry weather that is going to be heading into the central part of the United States this weekend. 

But in this part of the region, we really don’t have much going on. So it’s gonna be a nice New Year’s Day. It’ll be nice about New Year’s Day was that most of you won’t have much wind by our standards. And it will be a fair dry day. 

No major problems coming for travelers this weekend other than those windy areas. Now busy weather coast to coast. Starting next week, we’re going to spend some time today taking a look at the long range. 

So there’s not much going on in the short term, we’ll take a look at the long range weather, taking a peek into 2021. Here we are with today’s weather, we’ve got the low that came in and brought the snow it’s headed to the Midwest, we have a piece of that low that’s left here. 

There’s gonna be some problems here. We’ll share that minute there’s gonna be some problems here as well for travelers. But out here we’re looking at the weather improving, you’ll see this Well, this is a pretty impressive little low coming into the West Coast right here in the Pacific Northwest. 

But it’s gonna break into two a part of the storm ago here, the other part of the storm go here, it’s gonna split. And since it splits and you can see it splitting. Here’s what’s left of it. And here’s the other part of it. 

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This is by Thursday afternoon. So here we are today. And then look what happens to the pattern just today later that storm split so there’s really not much left. There will be some snow in the higher terrain here as it goes through but it’s a weakening low. 

We’ll keep it I guy on this guy later and this guy later on but what will happen is that this guy will head off to the east. And we’ll go to a more West East more mild flow this weekend. Snowfall wise This is through Saturday. 

I want to show you that through Saturday, you can see that the mountains will see a little bit of light snow, we just see most of the heavier snow staying up into the Pacific Northwest mountains. 

That’s because the storm splits but as the storm splits and we get a low down here, look what happens. We’ll show you here on a big map. Look at this. Holloway down into Mexico look at down into Texas, then into the Great Lakes and upper Midwest. 

This long swath of winter weather cuts across many interstates and roads and highways. It’s not a wide band of ice and snow. But it’s pretty impressive Big Bend country could be looking at a significant winter storm as we head into the new year. 

But for Colorado for Wyoming for Utah, the this this region here there’s just not much happening other than mountain snow showers and flurries. Now where is all the cold air. This is a map of the globe looking from space down to the north pole here. 

We’re looking at the globe. Now this is Sunday. If you want to know where the really cold air is, it’s in Europe here. 

And then we talked about this yesterday, and how we saw a lot of cold air in Siberia and into the Korean Peninsula up here across the North Atlantic. This is really the big cold air mass that we need to keep an eye on. 

This is generating very strong Jetstream winds across the North Pacific. We’ll show you that here in a minute. But you can see the lower 48 and a good part of Canada pretty mild. As we go into the new year with above average temperatures really coast to coast. 

But here’s that swath of wintry weather right here that’ll be taking place. Now as we go further out. I want to show you what happens 15 days out or two weeks from now. Notice that the cold in Siberia here and the warmth in the North America here in two weeks. 

Look what happens. Now this is a computer model. But we could definitely see the cold still up in Siberia. But there’s a release of that cold into the lower 48 states, two weeks out from now. And so it’s still on the table. 

It’s a long range model. So take it with a grain of salt. But if you’re wondering where the really really cold air is it’s locked up up there and right now, it has no way to come South but it could come south as we get into the first couple of weeks January. 

Now going forward. This is what the maps look like for Saturday. We have a little wave coming through here. Here’s that Midwestern storm we just showed you. 

That’s going to be moving out. More of a mild Pacific flow of air comes in this weekend. So temperatures will moderate a little bit. by Tuesday. 

We have a cold front coming through this will bring the mountain snow a few snow showers in the plains but Again, with the Jetstream. 

So fast across North America, you’re just not going to get any Arctic gear that can come south, at least into the starting next week. But look what happens when we go further out. This is by next Friday. 

Look what happens. We have a big low here, good low in southeast Colorado, another low approaching the California coast, see how they’re lined up. 

What’s happening is, is that and this is something that we’ll show you here in a little bit more in a minute. What happens in this pattern is you get a strong Jetstream that undercuts an area of high pressure. We talked about that blocking Ridge yesterday in the North Atlantic. 

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Well, it retrogrades to the west, and goes over in near the green south of Greenland Hudson Bay Area, as we get into mid to late next week. And what that does, is it takes the Jetstream and it pushes it further south. 

That’s good news for California to get more wet. But what you tend to have is basically a train of storms that go coast to coast. 

This is why we think mid late next week. And the week after that you’re going to hear more on the news about winter weather across the United States, because these specific storms instead of being directed up here will be directed more this way. 

So January, is looking pretty interesting coast to coast, in terms of the weather getting more stormy. Now we’re going to go back and we’re going to talk about Arctic constellations, again, all the way through January 14 was where that map I just showed you was around, notice the Arctic oscillation remains in a negative phase, which is a cold phase. 

Now I’m going to show you a new oscillation. It’s called the North Atlantic oscillation. We don’t normally show this to you because well, it’s the Atlantic, it’s far downstream from us. But in the winter, we do pay attention to it. 

Notice, the North Atlantic oscillation is also in a negative phase, all the way through the next two weeks through January 14. 

Now, what’s interesting historically, is when you take the North Atlantic oscillation, and you take the Arctic oscillation, and you put them together, if they are both in a negative phase, which they are, you tend to get patterns like this.

This is where you are, you get that colder air that is able to dive in North America, and you get the storm track that is more suppressed to the south. 

And there’s that blocking high we talked about over Greenland. So what ends up happening is you get cold stormy weather in Siberia, in Europe, you had cold and stormy weather in North America, and very little going on in the Atlantic, the blue areas here show where the cold air tends to reside. 

And that’s kind of where it’s residing right now, but does have an opportunity to come in. So when you take an Arctic isolation, that’s negative North Atlantic oscillation that’s negative. Those are cold phases for North America. 

And you get a pattern that looks like this. That’s why right after the new year, for at least a couple of weeks, the weather across the northern hemisphere across North America is going to get more wintry. 

I want to show you this is the upper level jet stream wind for Friday morning. Now, this is a little bit of a busy map I know. 

But here’s the Aleutians. And here’s Alaska. So here’s Alaska right here, we’ll mark that with an A. Then over here we have Japan, we’ll do that with a J. Then here’s the West Coast, there’s the Pacific Northwest. 

So now that you have your bearings, what I want to show you is is that that really bitter cold air that’s up here contrasts with the warmer Pacific waters here, that’s a little bit further north of those tropical areas. 

Notice the Jetstream winds, these are winds at 30,000 feet, when you get a jet stream like this rocketing across the North Pacific in the winter. This is like fuel. This is like gasoline. 

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So what will tend to happen is this very straight wind, look how straight west to east it is. And it’s moving. 

I mean, these are Jetstream winds that are 170 180 190 miles an hour. Least are forecasted to be like that. This is where you get clear air turbulence. 

This is where you hear about flights going across the Pacific where they hit lots of turbulence. This is what happens in these situations. 

Now what will tend to happen is, all of this stored up energy in the jet stream, eventually will not become a straight line anymore, but it will buckle causing a ridge and a trough. 

And that’s where we ended up with this pattern here where you start to get more waves, more storms in the system. 

So while we don’t have a lot to talk about in the short term, there’s a lot on the table in the long term. Have yourself a great Wednesday. We’ll see

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Don Day Wyoming Weather Forecast: Monday, December 28, 2020

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This is the Don Day Wyoming weather forecast for Monday, December 28, 2020.

Below is a rushed transcription of Don Day’s forecast. Excuse the errors.


It’s Monday, December 28 2020. Hope everyone had a great Christmas. As we start off this week, well, we actually have some winter weather to talk about. 

We certainly got into some winter weather in some areas after Christmas day after a beautiful Christmas Day, a couple of fronts came through bringing the mountains and snow and we did see some snow showers in the plains in some areas of the region yesterday, but now a more potent winter storm is gonna be taking place.

It’s going to be coming up out of Central and Southern California, that’s a spot we haven’t seen a storm ticket track for a while. 

In fact, there were parts of southern California that got an inch of rain last night good for them. Now, when you see a storm this time of year go into central and southern California. 

Usually we’re gonna have some winter weather later. And that’s exactly what will happen. It’s a little ahead of a schedule, we were thinking the storm was going to be a tuesday wednesday storm, but now it’s going to be a Monday evening, Monday night Tuesday storm, it will last into Tuesday. 

Most of the snow happens in most areas tonight. And into the early morning hours of Tuesday, it’s going to be an active pattern mainly for the mountains after the storm and into the new year, snowpack will grow some more. 

As it’s another good pattern for the high country. It’ll be unsettled on the plains, we don’t see a significant snow event on the plains after this incoming storm for a while, but it’s going to be unsettled meaning we’re gonna have more wind events. 

We’re also going to have yes, some opportunities for snow. But the significant snows again, in this line La Nina pattern this time of year will tend to stay more towards the higher elevations but it’s going to be a busy pattern into the new year. 

So perhaps there will be other opportunities coming. This is the National Weather Service map showing current advisories and watches and warnings when it comes to inclement weather, what I should want to show you here, especially if you’ve got travel plans or you know somebody traveling see all the pink and purple here. 

All of these areas are under some type of Winter Weather Advisory or winter storm warning for today tonight into early tomorrow. 

The entire state of Nebraska is under an advisory a lot of Kansas, a lot of Iowa, a lot of Minnesota, Wisconsin, a lot of Wyoming and the mountains of Colorado. 

So you can see, especially in this area right here, this region is going to be impacted by this winter storm. 

If you’re traveling or planning on traveling, if you haven’t left yet, you may just want to wait till the storm goes through because roads and highways are gonna get really icy this by our standards is not a big storm. 

But it’s the most weather we’ve had in a while and it’s gonna bring just enough snow, cold and wind to make some poor travel conditions across the region. 

This is where it is as of today, the low moving through Central and Southern California finally bringing that area some rain. 

And this is a really good pattern for us to get snowed on. But what you’ll notice is, instead of it becoming what we call a closed low, a deep Colorado low, it’s going to just keep moving and become more of an open wave as it’s going to join up with this system coming in behind it. And what will happen by tomorrow. 

This is by noon tomorrow. You can see it becomes an elongated trough really more of a frontal system that will head off to the east. And that’s going to keep it from becoming a really big storm. And then we’ve got another system diving in behind it now by Thursday noon. 

Notice we’ve got a lo consolidating down here in South Texas and we have another wave coming in behind it. What is likely going to happen late this week is there’s gonna be a pretty big winter storm in the nation’s midsection as this guy gets kicked up. 

So there’s going to be more travel concerns across the lower 48 states as we go to New Year’s Eve and as we go into New Year’s Day and you can see we’ve got another low backup here. Another low backup here. 

It’s gonna stay really busy. Now this is the snowfall forecast through Thursday afternoon. And you can see this really shows where we are showing you those advisories where the snow is going to fall so you can see all of Interstate 80 is going to be impacted all of Nebraska’s it will be impacted all of Wyoming’s it will be impacted. I 25 along the front range of Wyoming in the Colorado will be impacted. I 70 the mountains of Colorado. 

Gonna see a really nice shot of snow out of this. Look at the Wasatch. The winters of Utah going to see some pretty good snow with his system as well. And then the Pacific Northwest. He’s starting to see the next system coming on in later in the week. quick update on snowpacks. These have all gone up. 

They’re still all below normal except these two drainages here. But a couple of weeks ago these were in the low to mid 60s right here. These were in the 60s and 70s. So we’re starting to see them in shop. They got a ways to go but they’re inching up and we’ll continue to see these snowpack figures. 

Get a little bit better in the next couple of weeks, Colorado’s in a similar situation. These all right here, and right here, they’re gonna get some really good snow out of this storm system. So these numbers will be going up by the end of the week as well, long term. This is for Saturday Night of the upcoming New Year’s weekend. 

We’ve got a pretty good front here. We’ve got other systems back up here, the Northwest flow is going to continue to move in. What this will do is this will keep us from having arctic air come in. 

The Arctic air is still bottled up and it’s being held at bay. So no severe cold coming. But as long as this act of Jetstream comes in off the Pacific like this, these waves will keep coming through. So we’re basically going to have the same weather we’ve had wind events, mountain snow and occasionally some snow on the plains, but no slow moving storm. 

This is by next Wednesday. You can see we got a wave coming through the middle of next week. Another one behind it. Here’s one here, here’s one here, so they’re just going to keep coming. So you’re going to see the heaviest precipitation falling in the mountains in this area here over the next week or two. 

The Arctic oscillation we showed you this late last week. The Arctic oscillation all the way through January 12 remains in a negative phase and so with that negative phase, it’s going to stay an active weather pattern, but the focal point will be in the high country. Thanks for listening and watching the Day weather podcast.

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Snow, High Winds Hit Portions Of Wyoming On Monday Night

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By Ellen Fike, Cowboy State Daily

Cold temperatures, wind and light snow hit northwestern and southeastern Wyoming this week as more normal November weather returned to the region.

According to the National Weather Service in Cheyenne, most of the week will be cold and feature at least a little bit of snow, at least in the southeast portion of the state.

The NWS reported that around one inch of snow fell in the area from Pine Bluffs to Rawlins, as well as in portions west of Riverton, Lander and the Yellowstone National Park area.

“Unsettled weather as we are in a progressive, fast moving west to east wind pattern,” the NWS said in a report Tuesday morning.

Tuesday would see “very windy” conditions, with wind-prone areas likely seeing gusts up to 70 or 75 mph, the Weather Service said. Gusts of up to 65 MPH were likely on the downslope of the Laramie and Snowy ranges, including cities like Cheyenne, Laramie and Wheatland.

Wyoming weatherman Don Day confirmed this in his Tuesday morning forecast.

“A more typical November pattern is finally settling into the western United States,” Day said.

Northwestern Wyoming will also be hit with snow over this week, but temperatures will begin rise over the weekend and into early next week.

Any truckers with light loads or people towing camper trailers will have difficulty driving across southeast Wyoming on Tuesday.

There will be another chance of strong winds later in the week.

Thursday will likely be the driest day in terms of snow and precipitation.

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Sorry, Wyoming’s Horrible Winds Are Not Uncommon For This Time of Year

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It’s a little too windy for October, isn’t it?

Unless you really like the wind, then the answer is yes. 

But when you look at the data, the hurricane force gusts that much of Wyoming has been experiencing are sadly not uncommon for October.

That being said, the 101 mph gust recorded at a place aptly called Mt. Coffin in Lincoln County does seem a little extreme.

It really shouldn’t be in the conversation though. That’s what Wyoming’s weatherman Don Day told Cowboy State Daily on Thursday.

“That’s because it was a mountaintop wind,” Day said. “It’s almost 11,000 feet and not representative of wind on the plains.”

Using Day’s restrictions, the 84 mph gust at Fort Washakie does count. As does the 83 mph wind gust at Arlington. And even the relatively wimpy 71 mph gust at the Cheyenne airport counts.

Sadly, it’s not unusual for this time of year.  We might think it’s unusual because it’s happening now and our memories really aren’t very good.

“October to April is our windy season and strong winds like yesterday happen in October more than you think,” Day said. 

It’s because the seasons are changing and when that happens, we experience an increase in strength of jet stream winds aloft and that’s when we get our high wind events, Day explained.

There’s got to be a way to make lemonade out of the lemons though, right?Not really.

You can try kite-flying. But you’ll never see your kite again, Day said.

Well, at least we can harness the excess wind and generate wind-power.

Nope. It’s even too windy to generate wind-power, he said.

If you want to blame anyone, you can blame Day. We do. We’re well aware that this is killing the messenger, but we don’t mind.

Truth be told, however, the problem is where the state is located.

Wyoming is in the mid-latitudes (half way between the North Pole and the equator), Day explained, and from fall to spring the jet stream is either overhead or nearby and we have strong winds aloft (which means strong wind events as Day mentioned earlier).

Second, Wyoming’s high elevation puts us closer to those jet stream winds.

Third, and this is where Day really gets interesting:

If you look at a map of North America, the largest gaps between mountains in the Rockies are in Wyoming, from the end of Snowy Range to the tip of the Wind Rivers and between Casper Mountain and the Bighorns.

“The winds get squeezed through the gaps and that accelerates the wind,” he explained “Like putting your thumb over a garden hose.”

“So, there are parts of Wyoming where the wind is accelerated because of the interaction with the terrain (mountains and mountain gaps) and the strong winds aloft,” Day said.  

“The best example of this is I-80 around Arlington/Elk Mountain and I-25 at Colorado border and I-25 south of Wheatland,” he said.

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Wyoming Weatherman Don Day Explains Change in Stratosphere Could Mean End of Warm October

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Wyoming meteorologist Don Day isn’t your average weatherman.

He’s not the fat guy who stands in front of the blue weather screen and blurts out the high temperatures for 15 locations across the state and then goes to five minutes worth of commercials before giving the forecast for the next 24 hours (which, incidentally, anyone could get in 10 seconds by checking their phone).

Day actually knows what he’s doing.

So anyone who listens to his forecasts or his podcasts actually can learn something by tuning in.

Today’s podcast is a good example.

Day explained that when the stratosphere is warm, the weather is cold in Wyoming and when the stratosphere is cold, the weather in Wyoming is warm.

Why?

“When the stratosphere warms up, the colder air that’s at the North Pole wants to push further south into the mid latitudes,” Day said. 

When the stratosphere gets colder, the colder air stays close to the North Pole and it continues to be warm where we are, he explained.

What does that mean for us?

It means that the warmer weather most of Wyoming has been experiencing over the first 10 days of October is probably over. And if the modeling is correct, Day says, it could be over for good. 

By the way, the stratosphere, as Day explained this morning, is not just a hotel in Las Vegas, but the layer of the atmosphere between 60,000 and 150,000 feet.

Day also explained how his weather maps work. For example, as we get closer and closer to winter, something known as the “Hudson Bay Vortex” gets created.

“Notice the green and blue colors here which represent some really cold air getting better consolidated,” he explained. 

“It’s a vortex of cold air that builds over the higher latitudes and really is a big producer of cold air masses during the winter season. Notice how it’s growing, getting better established,” he said.

For those interested in the “whys” of weather, Day’s daily forecasts are must-listen events.

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No Way — Outside of Time And Traveling Whack-A-Mole — To Escape the Smoky Air in Wyoming

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Like it or not, parts of Wyoming and other places in the west are stuck with smoky air for awhile because of the wildfires in California and the Pacific Northwest.

And that can be problematic for everyone but especially for people who already have breathing issues.

That’s why when we saw a television station in Spokane recommend Cody and Rock Springs as locations in Wyoming to escape the bad air, we wondered what was so special about these locations. Could they be home to smoke-free unicorns?

Sadly, there are no unicorns. The respite from the smoke could all be temporary.

Wyoming meteorologist Don Day said those two locations might be have good air quality presently, that could easily change.

“It is a moving target, the whole Cody/Rock Springs thing was at a moment in time, the smoke plumes come and go, so what is good one day may be bad the next,” Day told Cowboy State Daily.

“There are no good or worst spots,” he said.  “It all depends on the day.”

Day recommended visiting this website to check on the conditions in case you wanted to travel to get away from it.

If that is your strategy, be prepared to play a game of traveling whack-a-mole. You might be in a good location for six hours, only for weather patterns to shift and smoke to roll-in.

If you can suck it up for a couple more days, he says it will get better.

“I expect the smoke through Thursday, it starts to thin out Friday and into the weekend but may not completely move out,” Day said.

He said much-needed rain is headed for Washington and Oregon in the next few days which will certainly help. But most locations in California are still going to be dry.

“California fires will only get rain in the far north,” he said.  “Central and southern California fires will be the bigger smoke producers this weekend and next week.”

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Don Day: Good Weather Coming Up But Not Until the Weekend

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We’re already looking ahead and wondering when this summer winter storm is going to pass.

Wyoming’s weatherman Don Day says the weekend is going to be great. But until then, we have a big storm to work around.

“When you look out your window in many areas here in the Rockies and the High Plains, the storm is going to impact the region through Friday. This is a doozy of a storm system folks for this early in the season,” Day said in his morning forecast.

Day said the storm doesn’t mean winter has arrived. This is just an “interruption,” he said.

“We’ve got nice fall weather coming but certainly it is fall now. This storm system is basically readjusting the jet stream and we’re still going to have some warm dry days coming up in September and October.”

Travel conditions will improve after early Wednesday, Day said. 

And, although it may not seem that way, there is some good news that’s coming out of this moisture. It’s killing the fire season and will help with the drought.

“This is a godsend for the fires across the area,” Day said. “This is going to just do wonders with the fire situation. Especially the bad fire in the Front Range, the mountains west of Fort Collins. Look at all of that good moisture there.”

Wyoming will bounce back from this storm system but it’s going to take some time, Day said.

“Basically it’s going to stay very cool through Friday and we’ll see rain on the plains and snow showers in the high country. But by Saturday afternoon, we’ve got a nice high pressure Ridge returning to the region. It’s not a hot one.”


The following is a computer-generated transcript of the Don Day daily forecast. For best results, watch the video embedded above.

It’s Tuesday, September 8 2020, although you’d swear it’s November or December 8 2020. When you look at your window in many areas here in the Rockies and the High Plains, the storm is going to impact the region through Friday. 

Folks, a lot of the biggest impacts are certainly coming through the next 24 hours. This is a doozy of a storm system folks for this early in the season. We’ll have travel impacts into early Wednesday, after early Wednesday. I think travel conditions will improve although it’s going to be slow going still over the higher elevations of it and this the mountain passes of the region. 

Now this is a godsend for the fires that fire situation in Colorado, the Cameron Peak fire area blowing up over the weekend, causing widespread smoke across the Front Range, a huge increase in acreage that burned up but this is going to be a godsend the storm will for that fire and other fires burning in the West. And also the area’s most impacted by the real severe drought conditions this summer. 

We’ll get good moisture out of the storm system. Now by the weekend, we’re right back to nice September weather again. This doesn’t mean we’re into winter folks, it’s an interruption. We’ve got nice fall weather coming but certainly it is fall now, after the storm system is basically readjusting the jetstream and we’re likely … still gonna have some real warm dry days coming up in September, October, we’ll have other fronts as well. But good weather will return by the weekend. 

This is where we are today the big ridge in the Gulf of Alaska then the deep trough cutting into the United States. The upper level low over Utah is now bringing moisture into the region on top of the Arctic boundary that came into the region and is all away is even pushed west of the Continental Divide. So this is where we get overriding southwest winds over the cold air moisture getting lifted over the cold air. Great way to make it snow. The trajectory of the air follow the wind barbs …

Look how far … you wonder why it’s so cold because of the trajectory The air is coming all the way up basically from near the Arctic Circle folks. You wonder how things could change so quickly? Well over the weekend we had record heat come up from the deserts. And now we’ve actually completely done a 180 and bring it in from the Arctic. 

This is our temperature relative to normal as of this morning. Look at the extent of this cold plunge You know, this cold plunge is going to go east and will affect other areas of the Corn Belt Midwest just not the Rockies and high plains but that is one impressive cold blast. This is the precipitation that will fall through the next three or four days. 

Most of the heavier precipitation now is falling up in northern Wyoming and southern Montana but now it’s central and southern Wyoming, Colorado, New Mexico, the Western and high planes that are going to get a goodly amount of moisture, widespread moisture, the best we’ve seen in months in some areas, and you can see the yellow here the heavier precipitation in the mountains of Colorado, up into Wyoming. 

This is going to just do wonders with the fire situation. Especially the bad fire in the Front Range, the mountains west of Fort Collins. 

Look at all of that good moisture there. This is what temperatures are going to be like relative to average by tomorrow afternoon Denver 48 degrees below normal for temperatures by noon on Wednesday. That is one heck of a cold wave for this time of year. Look at this minus 30 degrees relative to normal going all the way through Amarillo and headed towards El Paso. Now let’s see what happens with the pattern. 

This is for tomorrow morning. The upper level low barely moves. It just parks itself right along the Colorado-Utah line. High pressure stays in the Gulf of Alaska and the storm is gonna basically linger keeping us cold and wet well into the day on Wednesday. By Friday, look at that, it barely moves. 

This is today. Two days later. It’s in East Central Wyoming. Now notice it’s not as strong. So what it will do is keep a cool moist, unstable airmass overhead. So basically it’s going to stay very cool through Friday and Wednesday through Friday will bring occasional showers of rain on the plains and snow showers to the high country, the region. 

But by Saturday afternoon, we’ve got a nice high pressure ridge returning to the region. It’s not a hot one. But what it will do is bring a return of nice looking, in fact, great looking September weather by the weekend that will probably stretch into all the next week and this is by next Thursday and Friday. 

A more zonal west to east flow goes across the country, so it’ll warm up. Now it won’t be terribly hot except here in California. The rest of the nation. This is really looking like a fall pattern with the jetstream, looking stronger, be more south towards the U.S. border. 

Tropical activity showing up again, in a long, long range charts. Maybe from mid to late next week something to keep an eye on. Thanks for listening and watching to the Day weather podcast. Hopefully you can get through the storm. Okay, talk to you Wednesday.

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Wyoming Weather: Get Ready For Snow

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We were holding out hope that a change in the weather pattern would mean the talk of snow early next week would dissipate. 

Fuggedaboutit. It’s happening.

Wyoming weatherman Don Day gave us absolutely no hope on Friday afternoon as he killed the thought of a reprieve from the wintry grim reaper.  

“Our confidence in snowfall on Monday and Tuesday keeps growing,” Day said.  “We have a pattern setting up that’s going to cut a lot of Canadian air loose out of the Northwest Territories straight south into Wyoming on Monday night and Tuesday.”

Day said the storm was a “good news, bad news” situation as the fire season will likely end as a result of the storm but so will the growing season.

“This will be a very impactful storm. Because it’s so early in the season, we have a lot of leaves on the trees. The storm could bring some branches down.”

Day said the entire state will be affected by the storm but mountainous areas, locations around the I-25 corridor, and the higher elevations on I-80 (of course, Laramie) will be the hardest hit.

“The crazy thing is all of this is gonna be preceded by some very hot temperatures through the weekend,” he said. “I mean, we’re going to have temperatures in the 80s and 90s. And 36 hours later, we’ll be in the teens and 20s.”

Not all areas of the state will receive measurable snow. Day said locations under 5,000 feet should expect rain and, at worst, a rain/snow mix.

Although rare, wintry patterns at this time year have happened before in Wyoming. 

Day points back to 1985 when only six weeks after a devastating flood hit Cheyenne on August 1, the capital city received 10 inches of snow.

Although we can all feel sorry for ourselves, perhaps we should save some empathy for Laramie. After all, their summer was really short.

Day recalled that Laramie got hit by a fluke snowstorm this year on June 8. That storm dumped 10 inches on the community.

“Laramie will only go 90 days between snowstorms this year,” he said. “Talk about a short growing season. This is truly 2020.”

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Don Day Wyoming Weather: 40 Degrees Below Normal, Snow Could Be In Forecast

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It’s going to be a roller coaster of extremes for Wyoming weather over the next few days.

Wyoming’s weatherman Don Day, in his daily podcast, said the state is going to be blasted by desert-heat over the next few days but then the jet stream “buckles,” bringing in cold air from Canada.

“Look at all this purple,” he said of the computer model showing the cold air.  In some areas of Wyoming and Colorado the temperatures are 40 degrees below normal.”

Day said the computer model is likely overdoing things but there is a possibility for freezing temperatures and snow — even on the plains — happening next week.

“Look at that, over an inch of snow in Casper and maybe a lot of snow in the Wind Rivers, the Big Horns, the Beartooths, the Front Range mountains of Colorado and the southern Wyoming, and the Laramie Range,” he said while looking at the computer model.

The full rough transcript of his podcast is below. Or just watch the embedded video for more.

———

It’s Thursday, September 3, 2020. And here’s your Day Weather podcast.

Well, folks, it’s gonna be interesting here over the next week in terms of what we’re going to see. 

First of all in the short-term, it’s going to get hot again, high pressure builds over and takes over strongly again across the Great Basin and Rockies. 

However, it’s temporary because after a big warm up, basically through Sunday over the next four days it’s going to get hot again, then we’re gonna have a big cool-down coming next week. Much colder with rain and yes, folks, we could very well see a chance of snow even on the plains early in the week next week starting late Monday, Labor Day Monday into Tuesday and Wednesday and next week. 

Temperatures are going to fall sharply by late Monday into next Tuesday and Wednesday, and we’ll show you why. 

Here we are for the forecast for Saturday. Look at this big high on Saturday over the four corners region in the Great Basin. So basically for today, Friday, Saturday and Sunday, we’re going to have the heat from this desert high rebuild and expand across the Intermountain West in the western plains, with the … main jet stream riding far to our north. 

But way back up here in the northern and Western Atlantic, there’s actually some tropical activity, some typhoon activity that’s going to get its energy into the jetstream and cause the jetstream to basically buckle and cause a big area of high pressure to build back up into the Gulf of Alaska. 

And here we see it forming by Sunday afternoon into Monday. See the high building in the Gulf of Alaska connected to the Great Basin high right here. And notice the jetstream buckles and when that happens, you get that release of colder air from Canada. 

So this is late Sunday into Monday morning. By the timeframe of Tuesday, we have a big high up in the Gulf of Alaska, the Pacific Northwest and it drives another wedge of colder air into the High Plains and Rockies. Now this is very similar to what happened early this week. However, this plunge of colder air is deeper. 

There’s going to be more moisture with it. And a lot of the computer models are green on a trough and a strong cold front Monday night Tuesday and Wednesday across the High Plains and Rockies. Now this is both good news and bad news. 

The good news is this could be the best chance of widespread precipitation in a long time in the drought-stricken areas of Wyoming, Colorado, Nebraska, parts of Montana and the Dakotas and into the plains states. 

Yes, we are going to see a real big cooldown but it could be wet. Here’s the cool down. Look at all this purple. This is by Tuesday. In some areas of Wyoming and Colorado, temperatures are 40 degrees below normal.

Now that is likely overdone. However, the possibility of freezing temperatures and the first flakes of snow even on the plains could happen next week. If we don’t get cold enough for snow we’ll certainly see some good chances of rain and certainly the high country of Wyoming and Colorado is going to have a good chance of snow. 

So for archery hunters headed to the field, next week, you probably are going to see a cold wet pattern up in the mountains for a few days. As we see here, zooming in, look at the close-up of these temperatures. Right here, this is by noon on Tuesday, Denver 46 degrees below average with our temperatures, that basically means temperatures in the upper 30s and lower 40s by noon on Tuesday. 

We’ll see if it’s that cold. Models, a lot of timesm overdo things as we well know. But this extensive area purple shows you how impressive that cold air is. But when you get cold air like that this time of year, you’re going to get some upslope conditions that are going to form and hence there you have the good chances of precipitation. 

Look at that, over an inch in Casper maybe. A lot of snow in the Wind Rivers, the Big Horns, the Beartooths, the Front Range mountains of Colorado and the southern Wyoming, the Laramie range, even up into the Pine Ridge of Nebraska, the Panhandle, Nebraska, that’s likely going to be rained. 

And it’s a pattern folks to pay close attention to because we’re going to go back to hot summer weather here for the next four days. Then we’re going into reverse. And here we are with the forecasts of potential snowfall with this front. Now again, take this with a grain of salt but you can see even down into New Mexico. 

We have got this large area by next Tuesday and Wednesday, we’re gonna be cold enough for snow reaching certainly the highest elevations and maybe those lower elevations above 6,000 feet. So it’s something to watch. We’ll update you tomorrow. So be ready for the heat. Then be ready for a 180 again next week. See you on Friday, have a good day.

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Severe Storm Season Still Here; South Dakota Blasted By Grapefruit-Sized Hail

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Yes, if you go to many supermarkets now you’ll see an array of ceramic jack-o-lanterns, giant inflatable goblins, and other Halloween-related Halloween.

But that doesn’t mean summer is over yet — especially summer weather. And all the evidence you need that summer weather is still here happened over the weekend in South Dakota.

Grapefruit-sized hail, measuring 4.5 inches, and 80 mph winds clobbered areas of the Black Hills on Saturday.

A graphic photo of one of the victims of the hailstorm went viral. The photo showed a baseball-sized hailstone next to her bloodied face.

“Caught in a massive hail storm at Pactola [Reservoir],” Sarah Robinson tweeted.  “No time to run to the car, covered the boys with tubes (thank god we had them) and mom took the hit. Better me than them!”

The National Weather Service in Rapid City called the weather event a “mesoscale convective system.”

Whatever you call it, the Cheyenne Weather Service said the storm was a “sobering reminder to have multiple ways to receive a weather warning, especially if you’re traveling.”

Wyoming’s weatherman Don Day said Wyoming has about one more month where weather like this is possible.

“Severe weather season usually winds down very quickly after the first 10 days of September,” Day said.  “Until then, we still have the risk of hail and heavy rain, strong winds, and tornadoes but once we hit mid late September severe weather goes down significantly.”

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Southeastern, Central Wyoming Under Red Flag Warning Until Late Friday

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By Ellen Fike, Cowboy State Daily

Much of southeastern Wyoming is under a red flag warning for fire danger until late Friday, according to the National Weather Service in Cheyenne.

The affected area stretches from Baggs all the way east past Cheyenne and into Torrington. It also stretches as far north as Bill and Glenrock.

The Weather Service predicted winds of around 15 to 25 mph, with gusts up to 35 mph.

Meteorologist Don Day noted in his Friday forecast that Wyoming was in for warm and dry weather, perfect conditions for a red flag warning. Fire dangers will be a concern over the weekend and into next week, he added.

“We have been able to avoid widespread or big fires this fire season so far, knock on wood,” Day said. “But be really careful if you’re going out this weekend or next.”

A red flag warning means that critical fire weather conditions either are occurring or will shortly. A combination of winds, low relative humidity and warm temperatures can contribute to this type of fire condition. Any fires that start in these conditions can spread rapidly, so outdoor burning should be avoided.

The NWS provided tips on what to do during a red flag warning, which inclulded:

  • If you are allowed to burn in your area, all burn barrels must be covered with a weighted metal cover, with holes no larger than 3/4 of an inch;
  • Don’t throw cigarettes or matches out of a moving vehicle. They could ignite dry grass on the side of the road and start a wildfire;
  • Extinguish all outdoor fires properly. Drown fires with plenty of water and stir to make sure everything is cold to the touch. Dunk charcoal in water until cold. Don’t throw live charcoal on the ground and leave it;
  • Never leave a fire unattended, since sparks or embers can blow into leaves or grass, ignite and fire and quickly spread.

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This Week is Your Last Best Chance to See Comet NEOWISE

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If you haven’t seen Comet NEOWISE yet, don’t despair.

Wyoming meteorologist and amateur astronomer Don Day said this week is prime-time viewing for the comet.

Day said NEOWISE will have a magnitude of 3 this week which means you’ll be able to see it with the naked eye and with binoculars or a telescope, the view will be “fantastic.”

“It’s absolutely still worth it to go out and see it,” Day said.  “The tail is really, really long. It will look like a faint, white smudge.” 

Why should you be excited about a “faint, white smudge”?

Because it’s the most visible comet since Hale-Bopp and with binoculars or a telescope, that smudge will come alive.

Day said the best viewing time is about an hour after sundown through midnight. 

For best results, go outside where it’s dark and the skies are clear. 

The key here, Day said, is a spot where the light pollution is minimal.

Find the Big Dipper (look to your northwest).

Then, look straight down. It’s about 20 degrees above the horizon. The more your eyes get used to the environment, the more clear the comet will appear.

And if you have a pair of binoculars or an entry-level telescope, “you’ll be dazzled,” he said.

If you want to take a picture of it, Day recommends the purchase of a tripod and a digital camera.

“You can get some amazing pictures of it,” he said.  “Go with a high ISO and the exposure time should be between 5 to 25 seconds.”

He said purchasing a sky tracker — which synchronizes your camera with the rotation of the Earth — isn’t necessary but it will improve the shot.

Day’s photo (above) was taken Friday night about 10:30 p.m. near Keystone, Wyoming. He said the ISO was set at 4800 and the exposure time was 25 seconds.

“You’ll probably be disappointed with the naked eye, but you look at it with binoculars or telescope, watch out,” he said.

Day did say that the comet can probably be viewed through the end of August but this week will be the last, best time to see the comet.

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Don Day: Extreme Fire Danger For Parts of Wyoming This Weekend

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Wyoming meteorologist Don Day is urging caution this weekend as the fire danger in the state is between the categories of “very high” and “extreme”.

That’s due to a high pressure system located in Arizona and New Mexico which is pushing the desert heat into Wyoming.

“The fire danger is sky high,” Day said. “It has really gone up this week in many areas. Lots of fire restrictions especially in the forests. But across the plains as well.”

Day urged caution this weekend as a stagnant weather pattern will continue through Tuesday.

“This is going to be a critical weekend to get through with extremely high fire dangers in the very high to extreme category over most of Wyoming’s mountain areas,” Day said.

Although a monsoon will move into the area, it’s a weak one so the relief won’t be as pronounced. 

“It’s going to be a very weak monsoon this year so keep your expectations in check,” he said.

“We do expect thunderstorm chances to get better mid- to late week in the region,” Day said.

For Day’s full weekend forecast and a look at Comet NEOWISE, watch the video (above).

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How to See Comet NEOWISE In Wyoming

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Some of the great things about living in Wyoming are the wide open spaces and the unobstructed vistas.

This is especially true when we have a comet viewable with the naked eye. And that time is now.

Comet NEOWISE is now making itself seen for us earthlings and here in Wyoming, that means we’re going to get a good show.

That good show has already made itself visible to the state’s early risers, like our friend Don Day, the meteorologist known as Wyoming’s weatherman.

Day doesn’t have superpowers that give him X-ray vision or anything. It’s just that he gets up at around 3:30 every morning.

So when Comet NEOWISE appears on the horizon an hour later, he gets the view.

For the next few days, the comet will be visible between 4:30 a.m. and 5:30 a.m. the east-northeast portion of the sky.

Don’t want to get up that early? No problem. Just wait until Monday, when NEOWISE will become an evening comet.

“This is really turning into a good comet,” Day said from his office in the old airport tower in Cheyenne.  “We don’t get these very often when you can see them with your naked eye.”

Day said comet fans were worried about NEOWISE because the last two comets predicted to put on a show — Atlas and Swan — broke up as they made their journey around the sun before they could make a close pass of Earth.

Not so with this comet. It made the trip around the sun and is now “hurtling through space to give us some natural fireworks,” Day said.

“NEOWISE isn’t as bright as Hale-Bopp,” Day said, referring to the legendary comet visible from Earth in 1997. But he said it’s a good one.

“If you are an astrophotography buff, you should be able to get some spectacular photos because of our great horizons and topography,” he said.

To watch the comet in the evening starting on Monday, Day suggested looking to the northwest and low on the horizon right about sunset.

“Just look for the Big Dipper and go down from there,” Day said. “You won’t be disappointed.”

Day said great photographs of NEOWISE are available on SpaceWeather.com

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Wyoming Among Top States Where Fatal Lightning Strikes Occur

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By Ellen Fike, Cowboy State Daily

Wyoming is among the top 10 states where fatal lightning strikes occur, according to the National Weather Service.

In a graphic posted to the NWS Cheyenne’s Facebook page kicking off Lightning Awareness Safety Week, it showed that Wyoming, Colorado and eight other states across the country had the most lightning strike fatalities over the last decade.

Meteorologist Don Day told Cowboy State Daily that Wyoming is such a target for lightning for a few reasons.

“We live in a place with a high frequency of thunderstorms,” he explained. “Also, Wyoming has such wide open spaces and there are miles and miles with no trees. In a lot of situations, you’re the highest point and lightning has an easier time finding you.”

Wyoming’s peak thunderstorm season is from June to August, although storms usually start in March and end around October.

Since people recreate outdoors so frequently in Wyoming, fatal lightning strikes can happen while someone is hiking, climbing or walking along a ridge.

According to NWS, around 23 million cloud-to-ground lightning strikes occur every year in the United States, with approximately 290,000 of them occurring in Wyoming.

From 1984 to 2013, the U.S. averaged 51 lightning fatalities per year. Only around 10% of the people struck by lightning are killed, but the other 90% must cope with varying degrees of discomfort and disability, sometimes for the rest of their lives.

From 1959 to 2012, Wyoming was considered the first in the country in the number of lightning deaths and injuries per capita. Since 1995, all of the lightning fatalities in Wyoming have occurred in the mountains.

In Wyoming, lightning is responsible for more deaths and injuries than any other thunderstorm phenomena. From 1996 to 2013, lightning was attributed to eight fatalities and 70 injuries across the state.

Day noted that if anyone is looking to hike throughout the peak storm season, they should start early and wrap up their journey around noon or 1 p.m., since afternoons and evenings are usually when Wyoming’s storms develop.

Golfers should abide by similar guidelines and make note of lightning shelters at their local golf course.

Boaters should get back onto shore as quickly as possible when they begin to hear thunder and seek shelter immediately.

“The best course of action is to avoid situations where the risk of a lightning strike goes up,” Day said. “Lightning can defy logic. It’s crazy, it can do some amazing things. But these lightning strikes happen more often than you think and it’s a dangerous part of living out here.”

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Hey Wyoming: Get Ready For More Snow

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The year 2020 continues to be eventful. Pandemic, murder hornets, asteroids, and now snow in June.

Even though we are nearly one-third of the way through June, Mother Nature doesn’t care about our calendar system.

It snowed on Sunday in western Wyoming and many parts of Wyoming will get more snow Monday night and into Tuesday morning, according to weather forecasters.

Wyoming meteorologist Don Day said the heaviest snow will occur (not surprisingly) near Laramie.

“It’s going to snow in Laramie tonight. It will snow on the summit between Laramie and Cheyenne. It will snow between Rawlins and Laramie — around Arlington and Elk Mountain,” Day said.

“I would not be surprised if we receive several inches of snow on I-80 between Laramie and Cheyenne,” he said.  “Also expect snow throughout the southern mountains of Wyoming including the Sierra Madres, the Snowy Range, and the Laramie Range down to 7,000 feet.”

That’s not the only place it will snow.  Western Wyoming will get hit again.  The National Weather Service is predicting 1 to 3 inches of snow above 9,000 feet in western Wyoming and 2 to 4 inches above 9,000 feet in the Tetons.

Sublette County Emergency Management offered some hope.

“The high June sun angle will likely melt a lot of the snow on the road surfaces,” they posted.

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Don Day: Get Ready For Wild, Severe Weather in Eastern Wyoming on Wednesday

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By Ellen Fike, Cowboy State Daily

Winds coming from the south will interact with some upper-level winds coming in from the west, causing severe weather for parts of the state’s eastern half, according to a Wyoming meteorologist.

Meteorologist Don Day said in his Tuesday forecast that it’s going to be a “wild [Wednesday] afternoon and evening” for people in Cheyenne, Torrington, Gillette and the rest of eastern Wyoming.

He sourced his information from the Storm Prediction Center, showing that much of eastern Wyoming was at an “enhanced” risk for severe weather, including possible tornadoes and hail.

“Their job, all day and all night, is to find out where the highest risk of severe weather is going to be, especially severe thunderstorms and tornadoes,” Day explained. “They identify areas of risk.”

There are three levels of risk: marginal, slight and enhanced, and most of Wyoming fell into the latter category.

Day noted that the SPC’s use of “enhanced risk” is fairly rare, driving home the point that the severe weather on Wednesday was something to take seriously.

“This is one of those ‘Katie, bar the door’ situations,'” Day said. “There’s going to be a lot of spin in the atmosphere which leads to strong updrafts.”

“Strong updrafts lead to tornadoes, hail, and a lot of heavy rain. It’s going to be a wild,” he said.

The National Weather Service in Cheyenne also posted a severe weather outlook to its Twitter account, showing that golf ball-sized hail was possible Wednesday, as well as tornadoes. Local heavy rainfall may result in flash flooding.

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Ask The Weatherman: Can I Plant Tomatoes, Start Sprinkler System Yet?

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No. No. No.

That’s not the voice of a toddler having a meltdown. Rather it’s Wyoming’s weatherman Don Day answering the same questions he gets this time of year — every year.

It’s Groundhog Day for him. Not like the Feb. 2 holiday but rather like the movie.

The meteorologist says in late April and early May he always gets asked the same three things:

  1. Is it OK to plant tomatoes?
  2. Is it OK to start-up the sprinkler system?
  3. Is it done snowing?

The answer to these questions is always the same:  No.  

Seems like people in the Rocky Mountain West have a short memory.

Just last year, listeners in the region where his podcast is targeted experienced snow through the third week of June.  Not a typo.  June.

That doesn’t mean the really cold temperatures went along with that snow.  But it does mean that we’re not out of the woods yet.  We probably have about three weeks before, as he puts it, we can start to breathe easier.

“You have to remind yourself that it is usually the second or third week of May before our average last frost/freeze date,” he said.

Day said even though areas in Wyoming will see temperatures in the 80s on Thursday, don’t expect the Cowboy State to be be free of snow for two to three more weeks.

“We tend to have to get through the middle part of May,” he said. “It’s usually around or after Mother’s Day weekend before we’re done with the stuff.”

Even though the Arctic days are probably behind us, Day recommends not starting-up your sprinkler system yet.

“While we are probably done with severe freezing, we aren’t done with freezing.  So if you want to wait and let Mother Nature bring the rain.  Hold off on that sprinkler system, certainly I would.”

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Don Day: Say Goodbye to Purple Monster and Hello to Warmer Weather

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The following is a rushed transcript of Don Day’s Wyoming forecast for Thursday, April 16. For best results, watch the video.

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It feels like January 16, not April 16 out there.

Better weather is coming. The current storm system willl continue to bring snow and unseasonable cold conditions throughout a good part of the day.  But I think by early to mid afternoon, I think we’ll see the snow really come to a quick end on the plains although it will continue in the high country.

Possible record cold in many areas tonight. We are looking at lows in record territory.

This storm has brought a lot of cold and snow back into the region. We are getting reports of two feet of snow or more in the mountains of southern Wyoming. 

Temperatures are going to moderate some by Friday and through the weekend.


18 inches of snow in Lander (Bill Sniffin photo)

Better weather is coming. It’s going to be more mild but not necessarily a dry pattern. I do see opportunities for more precipitation coming but the good news is that the severe cold — at least for now — is going to ease starting tomorrow and moreso by the weekend.

This is where we are right now. Here is that low we’ve been watching all week. It’s come in about as expected bringing the snow and the cold but it will head off to the east allowing a bit of a change in the weather pattern.

By Sunday, we’ll see more of a westerly flow from the Pacific. We still have a Gulf of Alaska ridge but it is not as strong.

So a more mild air flow.

As we look ahead we do see that the temperatures just get off the charts tonight and tomorrow. These are temperatures relative to average for later today.

You can see a lot of purple. Yesterday, I had several questions about the purple monster. This is the purple monster that we were talking about — the severe cold.

It’s not this purple monster but Barney was my inspiration.  Notice the color of Barney very close to the color of the severe cold showing up on the weather charts here.

We can say goodbye to Barney and the purple monster and warmer temperatures are heading our way. 

Look at all the yellow and orange.  We will see the temperatures get a little bit warmer than normal.

We do see some better days coming — not as severely cold.

You can see that with the upper level charts. This is by Tuesday morning. High pressure not nearly as strong in the Gulf of Alaska. This big low is pushing and trying to erase that.

We have this little guy in California that’s going to come our way. This is why we are saying it will be more mild but not necessarily dry.

This low will produce instability and moisture that could bring us some good old fashioned shower activity next week. At least it will be mild.

By late next week and next weekend, here’s our next troublemaker.

We have another low coming in from the Great Basin. This system needs to be watched. Right now, I’ll give it a question mark. 

But if we were to talk about the next larger storm, it will be late next week or the weekend of the 25th or the 26th with another low coming in behind it.

What we’re seeing though is notice this blue area here. It is smaller. We are seeing the polar vortex kind of losing steam as we get to late April into early May which is what we would expect.

That should mean not as much cold air getting cut loose. But at the same time, with these systems coming through, precipitation chances are going to remain fairly frequent.

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Don Day: Wyo is “Plagued By Big Purple Monster of Cold Air” as Storm Approaches

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The following is a rushed transcript of Don Day’s Wyoming weather forecast. For best results, watch the above video.

Winter Storm will be moving thru and then improving weather is coming.

We will have periods of moderate to heavy snow for many areas of southern Wyoming.  

Confidence is very high. We’ve seen this pattern dozens of times and it is one of those patterns that makes it snow and the confidence is high.

Temperatures will moderate some by Friday and then into the weekend. So there are some better days ahead.

It’s not going to get real warm but it’s going to get warmer than it is right now and more spring-like.

Heads up travelers and stockgrowers. Be prepared for the next 48 hours. We’ve got stressful livestock conditions coming.  Be prepared for winter conditions thru early Friday.

Here is the updated precipitation forecast for Wyoming. You can see that it is a forecast that basically looks the same as I’ve shown you for the last several days.

The east/west trending area of heavier precipitation. We have that really strong jet stream wind that’s coming over and on top of a Canadian cold front that is going to back up against the mountains.

Then Pacific moisture is coming in from Washington and Oregon. So basically, we have three things. Good moisture, strong upper level jet stream winds, and a surge of Canadian air.

Also, we’ve got upslope winds coming underneath. This is one of the situations where the surface winds are coming in upslope from the northeast.

But the upper level jet stream winds are coming in from the west /northwest. So they are coming in from opposite directions and that adds lift to the atmosphere. That is one reason why we are so confident that what you see here will transpire.

You can see that the I-25 corridor — Wyoming into the front range of Colorado — is under the gun for significant snow. And then Interstate 80 from southwest Nebraska and southern Wyoming all the way to Evanston.

You can see the Sno-Chi-Minh trail — Rawlins to Laramie and then Laramie to Cheyenne is going to be hit pretty hard with significant snow. And since temperatures are so cold so the roads are going to be much worse with this storm when compared to the last one.

Snowfall totals.  If we were to use a 10-1 ratio, it would look like this. You can see a lot areas are over six inches. You can see the pink. Over a foot of snow.

Because temperatures are going to be colder, this could be under-forecasted in the snow amounts.

If we use another snow forecasting tool called Cuchera, you can see that with the air colder, the snow amounts could be a little heavier.

You see in the southern mountains over 20 inches, that probably is going to take place.

Be ready for the return of winter weather conditions. By tomorrow, these are our temperatures relative to normal.

You can see plagued by this big purple monster of unseasonably cold air banked up against the front range and the continental divide.

As we go forward, things look better.

Purple monster goes away and we get some orange and yellow on the map. We start to see near average temperatures return by the middle of next week.

So it’s not all bad news.

Just to give you an example of the jet stream pattern. We’ve mentioned this over the last week or so. This is something we would normally see in mid-winter.

There is a huge trough coming in the United States and it isn’t just us, everybody in this area here across Canada and the US is experiencing very cold April weather.

By Sunday, we still have a west coast ridge but it’s not going all the way up into Alaska and the flow of air into Wyoming is more from here. More from the coastal areas of Washington, Oregon, and northern California so that means the air will be more mild.

Going out further, by next Thursday the flow is more westerly. More directed toward central and southern California which means it will get more mild.

We showed you this yesterday, there is now a trough in the Gulf of Alaska instead of a ridge.  That changes things. That means more mild Pacific air for us and less Canadian air being more directed this way.

We will see a modest warming trend this weekend through the middle of next week.

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Don Day: All Roads Will Be Impacted By Big Approaching SnowStorm

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The following is a rushed transcript of Don Day’s weather advisory. For best results, watch the above video.

A spring snow, reduced visibility, and icy roads statewide late Wednesday lasting thru Thursday night.

We are expecting Interstate 80 and Interstate 25 to have the highest impacts with the iciest conditions, heaviest snow, and blowing snow and poor visibility.

All of Wyoming’s roads though will be impacted including the mountain passes.

We are expecting areas of snow and rain shower activity to develop in far western and northern Wyoming during the day Wednesday into some areas of the state by early afternoon.

Watch out for slick conditions over Teton Pass, Togwotee Pass near Dubois, South Pass, and Powder River Pass.

By early to mid afternoon those areas will have wet to slick roads.

Overnight Wednesday, snow will debelop statewide.  Falling temperatures and slick conditions.

However, the heaviest snow will focus itself right along I-25 and I-80 in southeast Wyoming.  This area could see significant snow, heavy at times, overnight Wednesday through the morning hours of Thursday with snow likely continuing into Thursday night.

This area outlined will have the poorest travel conditions.

Lighter snowfall and icy roads will be found in this area here thru the course of the day Thursday. Also expect poor travel conditions across western Nebraska I-80 and I-25 south into Colorado and I-80 west into the Salt Lake City area.

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Don Day: Wyoming Easter Winter Storm Remains on Track

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By Don Day, Cowboy State Daily

An Arctic cold front has just arrived in northern Wyoming early Saturday morning and will continue to move south during the day bringing strong north winds, plunging temperatures and rain changing to snow.

The front will be arriving in central Wyoming near Casper by late morning and the southern border by mid to late afternoon.

Temperatures which were in the 60s and 70s in many areas on Friday will only be in the 20s and 30s for Sunday and Monday with wind chills in the single digits and teens.

The heaviest snow will be in central, northeast and east central areas of the state. Places like Sheridan, Buffalo, Casper, Douglas, Lusk and Lander can expect 4 to 10 inches of snow by mid day Sunday. Snow will also be very heavy (a foot or more) in the Big Horns, Wind Rivers, Laramie Range, Snowy Range and Sierra Madre mountains. Snowfall totals will be lighter in southeast Wyoming with Laramie and Cheyenne expecting 1 to 3″.

Temperatures Sunday night will dip into the single digits and teens with temperatures remaining very cold through Monday. Below average temperatures are expected for all of next week across the Cowboy State.

Travelers and stock growers should be prepared for harsh winter conditions late today through Monday.

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Don Day: Get Ready For Winter Blast; “Spring May Be On Hold Until May”

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The following is a rushed transcript of Don Day’s Wyoming weather forecast. For best results, watch the video.

Don Day: In the short-term, the weather looks really, really good. It looks good through tomorrow and then it’s all downhill.

We have an arctic front that will be arriving in Montana by Friday night and in northern Wyoming by sunrise Saturday.

So enjoy the really good weather the next two days. Get outside if you need to do chores. Stockgrowers, take advantage of the next couple of days.

Then we’ve got this huge drop of temperatures with snow likely in most areas on Easter Sunday.  It is going to snow in most of Wyoming Sunday.

Cold will persist for a week or more.  Springs, folks I’m afraid to say, could be on hold until May.

The next two to three weeks, while there will be warm-ups, will be really short-lived.

Stockgrowers, I can’t stress strongly enough — our confidence is very high — take precautions, protect young and weak livestock really beginning in northern Wyoming Friday night and the entire night over the weekend.  

And more bouts of snow will be developing next week.

This is where we are going to be today with the jet stream pattern. The ridge is up in the Gulf of Alaska and the colder flow is staying off to our east.

We have southwest flow continuing ahead of that low out of California so we are enjoying this little sliver here of high pressure and warmer fair weather.

It is really going to be quite nice the next couple days.

However, by Saturday morning this low coming out of British Columbia is heading southeast.

Although it doesn’t look terribly impressive, this little kink in the jet stream is really driving a lot of what the weather will be.  

You see all this blue up here — that is extremely cold air that is going to come south right into the heart of the rockies and the high plains.

That’s by Saturday morning.  By Sunday afternoon, that British Columbia kink in the jet stream is right there.

There is another one right behind and another and then the Gulf of Alaska ridge is well-entrenched.

If you were to look at this and not see the date up here, you’d think it was something you’d see in January and February.

This is off the charts cold for April.  By next Wednesday night and Thursday, there is another little ripple coming through.

So there is another snow event and another reenforcement of cold weather coming in the middle of next week.

Ten days out we see the flow flatten out a little bit. So late next week and next weekend, we may have a little bit of warm-up but here comes another one and here’s another one up here and the Gulf of Alaska ridge is basically maintaining itself.

That’s the problem, as long as the Gulf of Alaska ridge is up there, the door to Canada is up there.

Look at this.  It is extremely cold air and it is on our side of the hemisphere. Over on the other side, it’s not nearly as cold.

The coldest air in the northern hemisphere is on our side for the next couple weeks.

So this guy, right here, is going to push fronts south and into the United States for the next couple weeks.

This is the precipitation outlook is thru Monday.  This does not include what is coming in the middle of next week — there is another round of snow coming.

This pattern looks very similar to what you’ve seen all week during this podcast — the northwest to southeast flow.

A lot of these areas that are blue here will see a lot of snow.  This is going to be mostly snow.  It will start as rain but it won’t last long.

This is what snow will be like if we were to imagine the snow falling at 32 degrees — a 10 – 1 ratio.  Pretty impressive as you can see.

Now with the air being really cold with this, we could use another formula. It is called ______ and it shows that we could have snow amounts that look like this thru Monday afternoon.

Kind of take the average between these two.

We are looking between 3 – 9 inches in the first ratio.  The second ratio we’ve got bigger snow amounts.

The Bighorn Mountains in Wyoming is going to get clobbered.  It will also bring significant snow to the Laramie range.  It is going to bring heavy snow to Wyoming’s southern mountains.

This type of pattern is a big snow producer. Look at the Wind Rivers.

So the big snowpack basins are going to pick up a lot of water out of this pattern.

These are the forecasted low temperatures for Monday morning. There are in fahrenheit.

Anywhere where you see grey is below zero.

It is conceivable that we have pockets of sub-zero temperatures by Monday morning.

Single digits in most of central and eastern Wyoming.

This is a mid-winter type outbreak of cold.  So for your Easter Egg hunt this year, looks like may want to be indoors.

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