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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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Weather Service Says Tornado May Toppled Trees for 500 Yards in Snowy Range

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By Ellen Fike, Cowboy State Daily

The National Weather Service is investigating damage from a possible tornado that occurred over the weekend in the Snowy Range.

According to a Facebook post, NWS received reports and photos of around 500 yards of downed trees in the area near Turpin Reservoir and Bow River Campground. This damage occurred during thunderstorms on Saturday.

“We have sent a team out to the Snowy Range today (June 8th) to survey damage from a possible tornado near Turpin Reservoir and Bow River Campground from Saturday’s storms,” the weather service said.

“Still uncertain if this damage was due to straight line winds or a brief tornado, but that is exactly what the survey team will be assessing today,” the post read.

Wyoming meteorologist Don Day said wind gusts of 80 and even 90 mph caused tree damage in many areas of the state.

“It was a wild weekend of wind,” Day said.  “The wind was awful. There are reports of damage over a wide area.”

“There was extensive tree damage in the Savery, Baggs, Dixon area. Lots of tree damage in Torrington too,” he said.

The possible tornado passed through the area around 3 p.m. Saturday. NWS is encouraging anyone with photos of damage from the area to submit them.

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Stormchaser Reed Timmer Streaming Severe Weather, Funnel Clouds in Wyoming

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LIVE on supercell west of Glendo WY

Posted by Reed Timmer Extreme Meteorologist on Wednesday, May 20, 2020

Well-known stormchaser Reed Timmer is in eastern Wyoming today with his eye on the sky watching for severe weather.

Timmer is using Facebook Live to stream what he sees and if you can stand the occasional foul language, it’s great to watch.

“Wow, look at that f*#king thing churn,” Timmer said while pulled over near Glendo.

So far Timmer has provided reports from Douglas, Glendo, and Wheatland.

Well-versed in social media, he has been tweeting simultaneously with his Facebook Live video.

“BIG-TIME plume or deeper moisture is pumping into southeast WY from the NE Panhandle into the #tornado target area for this afternoon/evening. Dominator van in position for intercept,” he tweeted earlier today.

Later he tweeted video of supercell activity over Douglas and Wheatland.

Viewers of Timmer’s live-stream might recall the movie “Twister” where a band of competing storm chasers battled to get the best footage of the storm.

Timmer’s live coverage was available here. When he is able to live-stream again, we will update the link.

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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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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: 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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Don Day: Wyoming Weather Forecasting Severely Affected by Coronavirus

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The accuracy of long-term weather forecasting is being severely affected by the coronavirus pandemic, according to Wyoming meteorologist Don Day.

Day said the lack of international air travel makes it much more challenging for meteorologists to accurately predict the weather five days out and beyond.

Many airplanes making international flight, Day said, are now equipped with radar equipment called AMDAR that sends vital upper level wind, temperature, and humidity data near jet stream level information to meteorologists. Since airline traffic has decreased significantly in recent weeks, much less weather information is available for computer modeling.

“The oceans have very little weather data as it is,” Day said. “Since we don’t have nearly as many flights across the oceans, we’re not getting this weather data and this is creating a real weakness in the modeling.

“Meteorologists may be able to fill in some of the gaps with some satellite data,” he continued. “But until we get aircraft going across the oceans at the rate they were before, we are going to be looking at weather forecasts out in the five-day-plus period that are going to be very poor.”

Day said he told people frequently before the pandemic to view with skepticism any weather forecasts made for further than five days in the future.

“They should — pandemic or not — not be relied on,” Day said. “But now they should really, really not be relied on.”

Don Day Weather: Snow With Cold Temps Will Make it “Really Nasty”

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Enjoy the last few hours of spring. Another cold front will be making its way into the Cowboy State.

And this cold front is really cold. Wyoming weatherman Don Day says winter weather is back and part of the state will experience snow and temperatures close to zero.

Watch the video above or read the rushed transcript below.

It is going to be really cold, here. Over the next 48 hours, most of you will experience mild temperatures today, Thursday and Friday will feel like February.

Temperatures will be between 25 and 35 degrees below average.

The next 48 hours will not be fun. Especially for those who feel cooped up and who doesn’t.

You have a little bit of an opportunity for awhile today before the bad weather comes in on Thursday and Friday.

Over the next three days, this is what the precipitation forecast looks like over the intermountain west.

You can see the blue area. The blue area is where we are going to see the heavier snow.

There is a strip that goes southwest to northeast across south central Wyoming through central and east central Wyoming and up to the Black Hills.

This axis — right here — could end up a bit more north or it will probably end up a little more south than the model shows.

It could be more like this as the system sinks in as the really cold Canadian air coming in behind it.

This is what the snowfall output looks like. The heavier snow is underneath the heavier band.

This is probably going to end up a little south. Central and east central Wyoming and along I-80 here is where the bulk of the heavier snow will fall.

Most of this will be snow. It will start off as rain. There will even be south thunderstorm activity in southeastern Wyoming later today as this front approaches.

Be ready for winter weather. By our standards, this is not a big spring snow storm. But some snow with the really cold temperatures will make it downright nasty.

A lot of purple on this map.  This is a very cold air mass for early April.

You’ve seen this before. This is a really big drop in temperatures coming.

Anyone in calving operations, you want to protect livestock for a good 48 hours from this pending cold snap.

These are our overnight temperatures on Friday morning. These are fahrenheit not celsius.

In the grey area, these are single digits to below zero. There is a pocket here in northeastern Wyoming.

Teens, lower 20s. And this is early April. This is a very cold wave coming with Wyoming in the bullseye in the cold temperature readings.  So when you wake up on Friday it won’t feel like April at all.

However, we will see some rebounding temperatures this weekend.

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