2-3 day dry break across the Intermountain West (IW).
Two storm combo hits the IW 2/20-2/23.
An Arctic front accompanies this storm cycle. Air temps plummet early next week aiding in snow efficiency.
1-3 feet possible across parts of CO.
A foot or more across the Wasatch and Tetons.
What follows this storm cycle through March 1? Data remains split and confidence is low.
Infrared satellite shows the storm track and storm systems lurking for next week. They will drag and Arctic front down as well.
Storm Cycle
Below, notice the amplification of the jet stream valid 2/21-22/2022. The jet reaches into the Arctic and buckles south. Both storm systems will ride this storm track.
It now looks like a two-storm combo for next week, 2/20-2/24 across the West.
They are colder, windier, and stronger storm systems versus the one that just moved through the Intermountain West.
Big totals possible in West/SW CO and Northern NM.
What happens after 2/24? Data remains split and confidence is low. High pressure might rebuild.
Water vapor satellite shows the storm track and next low pressure lined-over the Pacific. Orange/red = drier air aloft.
Next Week
A second storm system appears to piggy-back on the initial low pressure. This creates a larger window of snow potential for some areas (especially West/SW CO and Northern NM) between 2/20-2/24.
Below, notice the significant forecast pressure anomalies on 2/22 across the West. This generates a colder, windier storm system(s).
Beyond 2/24
Data remains split and confidence is low.
One possible outcome involves high pressure rebuilding across the West through March 1.
Snow Forecast
2/17-2/26:
I added Purgatory and Breckenridge to the map.
Forecast snow plume for Wolf Creek, CO:
Northeast, 2/17-2/26:
At least 50% of this accumulation occurs with a potential storm system on 2/25-2/26.
Storm #1 is sliding through MT, WY, ID, UT, CO, NM on 2/16 ending early 2/17.
A dry 2-3 day break follows this storm system.
Storm #2 arrives 2/20-2/23 (possibly lingering into early 2/24).
Will it be followed by high pressure or another storm system into March1? Data is split and confidence is low.
Infrared satellite shows the storm track and both storm systems separated by high pressure.
Storm #2
Storm #2 appears stronger and colder than storm #1. It’s the beneficiary of storm #1 dislodging a long-standing high pressure dome.
Snow forecasts are all over the board and confidence remains low where the bullseye(s) will end up. But, notice the significant forecast pressure anomalies valid 2/21-2/22.
Beyond Storm #2
What happens 2/24-3/1? Data is split and confidence is low. Here’s one possibility with high pressure rebuilding.
My friend Scot Stewart shot the video and photo below on 2/13/2022.
These types of “spaceship clouds” are called lenticular clouds. They can also be called standing wave clouds. They’re created and maintained by strong winds aloft over mountainous terrain.
I’ve talked a lot about lenticular clouds in past mountain weather safety courses. Typically they are a strong indication of strong summit-level winds. They can mean turbulence to pilots.
I snapped this photo on March 10, 2014:
Formation
They form through a unique combination of mountainous terrain, wind flow, and atmospheric stability.
Two storm systems will be separated by a 2-3 day dry break.
First storm system: 2/15-2/17
Second storm system: 2/20-2/23
Second storm system appears stronger, colder.
End of February: High pressure might rebuild across the West.
Water vapor satellite shows the storm track and high pressure dislodged but the first western storm system. 2nd storm system waiting in the wings over the Pacific. Orange/red = drier air aloft.
2nd Storm System
Below, notice the forecast pressure drop across the West. This occurs 2/20-2/23.
End of February
Data suggest high pressure might rebuild after the 2nd storm system through the end of February. Below, notice the higher forecast pressure anomalies. March might come in like a lamb.
Snow Forecast
2/15-2/19:
I’ve shaved (down) the Wasatch numbers for three days straight.
A storm system hits ID on 2/14, WY/MT/UT on 2/15, and CO/NM on 2/16. This is the largest storm system is 30+ days. Some of it’s energy is spent battling a large dome of high pressure.
Storm system only brushes CA with light snow, but could pave the way for a better snow chance down the road.
High pressure rebuilds for a few days.
A second storm system follows the path of the 1st around 2/20-2/23. This could be the stronger of the two storm systems with colder air.
Infrared satellite and storm track shows the high pressure currently being dislodged. This is the key to the 1st storm system. It will carve a path for a 2nd storm system around 2/20-2/23.
2nd Storm System
Looking down the road, a second potentially stronger system follows the path of the 1st storm system. Below, notice the size of the trough and forecast pressure anomalies valid 2/22/2022.
Finally, after weeks of high pressure and only minor, fast-moving cold fronts an actual storm system is lined-up.
It hits ID on 2/14, 2/15 WY/MT/UT, and 2/16 CO, NM.
This storm system is not a blockbuster, but it will pave the way for another storm system on 2/21-2/22.
Unfortunately, this storm system only brushes CA with light accumulation.
I did some backcountry skiing on Saturday in Colorado. Temps started below zero there was a couple inches of fresh snow. That’s been the pattern for the last 5 weeks with only fast-moving, minor cold fronts.
Here’s my full video forecast:
I include four snow forecasts in the video. Here’s one for the West from 2/13-2/20 taking into account this week’s storm system.
Minor, fast-moving cold front on 2/11 races south through MT, WY, CO, and NM. Light snow accumulation.
Alberta Clipper hits the Northeast late 2/11 through 2/12. Light snow accumulation plus some lake-effect.
Dry all weekend in the Pacific Northwest and British Columbia.
Larger storm system pierces the large Western high pressure ridge early next week, 2/15-2/17. This storm system delivers a shot of colder air as well. Strong wind above treeline.
Western high pressure rebuilds 2/18-2/21.
Infrared satellite and storm track shows the large Western high pressure ridge.
Long Range
High pressure rebuilds 2/18-2/21. Then it looks stormy again 2/22-2/24 with a trough of lower pressure sliding into the West breaking down the high pressure ridge.
Below, notices the forecast lower pressure anomalies across the West on 2/22-2/23.
Requests
I’ve had a few requests, here’s an update.
Steamboat: 1-4″ 2/11. 2-6″ 2/16-2/17. High pressure 2/18-2/21. Snow 2/22-2/24.
A fast-moving, minor cold front races south through MT, WY, and CO through 2/11.
High pressure anchored over CA remains formidable.
Mostly dry weekend for the Pacific Northwest. Next storm arrives Monday.
A larger storm system pierces the Western high pressure ridge 2/14-2/16 with snow for WA, OR, CA, ID, UT, MT, WY, CO, NM. This is not a blockbuster snowstorm for most places.
This storm system loses some of it’s strength while breaking down the high. It could be a “one and done” storm system with high pressure rebuilding afterwards.
Infrared satellite shows the storm track and large Western high pressure.
Requests
I’ve had a few forecast requests.
Red Mountain BC: 1-4″ between 2/14-2/16.
Powder Mountain, UT: 1-3″ between 2/15-2/16.
Big Sky, MT: 6-12″ between 2/14-2/16.
Revelstoke BC: 2-6″ between 2/14-2/16. Possible active pattern 2/20-2/24.
Dallas Peak, CO: 3-6″ on 2/16. Gusts to 40mph on 2/15-2/16.
One and Done
After the 2/14-2/16 storm system, high pressure rebuilds across the West. Below, notice the higher pressure anomalies across the West on 2/20.