Western storm system and Arctic front

Tomer’s Track

  • Heavy snow next week across parts of the Intermountain West – especially Colorado with 1-3 feet.
  • About a foot for the Wasatch and Tetons.
  • This is a two-storm combo with an Arctic front.

Here’s my mountain weather forecast video:

2/19-2/24:

Inches of total snow 2/19-2/24.

Forecast snow plume for Crested Butte, CO:

Inches of total snow accumulation.

Big totals next week and Arctic blast

Tomer’s Take

  • 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.

Infrared satellite 2/18/2022 5am.

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.

Forecast jet stream wind valid 2/21-22/2022, GFS interpretation.

Snow Forecast

2/18-2/24:

Inches of total snow 2/18-2/24.

2/25-2/27:

Inches of total snow 2/25-2/27.

Forecast snow plume for Crested Butte, CO:

Inches of total snow accumulation.

Northeast, 2/18-2/27:

Inches of total snow.

For more analysis please watch my forecast video:

Two storm systems next week

Tomer’s Take

  • 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.

Water vapor satellite 2/17/2022 5am.

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).

Forecast pressure anomalies valid 2/22/2022, GFS interpretation.

Beyond 2/24

Data remains split and confidence is low.

One possible outcome involves high pressure rebuilding across the West through March 1.

Forecast pressure anomalies valid 3/1/2022, Euro interpretation.

Snow Forecast

2/17-2/26:

I added Purgatory and Breckenridge to the map.

Inches of total snow 2/17-2/26.

Forecast snow plume for Wolf Creek, CO:

Inches of total snow accumulation.

Northeast, 2/17-2/26:

At least 50% of this accumulation occurs with a potential storm system on 2/25-2/26.

Inches of total snow 2/17-2/26.

For more analysis please watch my forecast video:

Snow forecast next 8 days

Tomer’s Take

  • 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.

Infrared satellite 2/16/2022 6am.

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.

Forecast pressure anomalies valid 2/22/2022, GFS interpretation.

Beyond Storm #2

What happens 2/24-3/1? Data is split and confidence is low. Here’s one possibility with high pressure rebuilding.

Forecast pressure anomalies valid 3/1/2022, Euro interpretation.

Snow Forecast

2/16-2/19:

Inches of total snow 2/16-2/19.

2/20-2/25:

Inches of total snow 2/20-2/25.

Steamboat snow plume forecast:

Inches of total snow accumulation.

Northeast, 2/16-2/25:

Inches of total snow 2/16-2/25.

For more analysis please watch my forecast video:

Lenticular Magic

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.

Lenticular cloud over the Colorado Rockies, 2/13/2022 Scot Stewart.
Lenticular cloud over the Colorado Rockies, 2/13/2022 Scot Stewart.

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:

Lenticular cloud, Colorado Rockies, March 10, 2014.

Formation

They form through a unique combination of mountainous terrain, wind flow, and atmospheric stability.

Mountain wave formation, NWS/NOAA/COMET.

Two Western storm systems lined-up

Tomer’s Take

  • 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.

Water vapor satellite, 2/15/2022 5am.

2nd Storm System

Below, notice the forecast pressure drop across the West. This occurs 2/20-2/23.

Forecast pressure anomalies valid 2/22/2022, GFS interpretation.

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.

Forecast pressure anomalies valid 2/28/2022, Euro interpretation.

Snow Forecast

2/15-2/19:

I’ve shaved (down) the Wasatch numbers for three days straight.

Inches of total snow 2/15-2/19.

2/20-2/24:

Inches of total snow 2/20-2/24.

Snow plume forecast for Cameron Pass, CO:

Inches of total snow accumulation over time.

Northeast, 2/15-2/24:

Inches of total snow 2/15-2/24.

For more analysis please watch my forecast video:

Western snow this week

Tomer’s Take

  • 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.

Infrared satellite 2/14/2022 5am.

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.

Forecast pressure anomalies valid 2/22/2022, GFS interpretation.

Snow Forecast

2/14-2/20:

Inches of total snow 2/14-2/20.

2/20-2/23:

Inches of total snow 2/20-2/23.

Northeast, 2/14-2/23:

Inches of total snow 2/14-2/23.

Snow plume forecast, Jackson Hole:

Inches of total snow over time.

For more analysis please watch my forecast video:

Western storm system this week

Tomer’s Take

  • 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.

Enjoying the view on 2/12/2022, Colorado.

Here’s my full video forecast:

2/13/2022.

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.

Inches of total snow 2/13-2/20.

Snow forecast next 8 days

Tomer’s Take

  • 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.

Infrared satellite and storm track, 2/11/2022 5am.

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.

Forecast pressure anomalies valid 2/22-2/23, GFS interpretation.

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.

Revelstoke BC: 3-6″ snow 2/15-2/18. 3-6″ 2/19-2/20.

Red Mountain BC: 1-3″ 2/14. 2-4″ 1/19-1/20.

Dallas Peak, CO: 1″ 2/11. 6-8″ 2/16-2/17. High pressure 2/18-2/21. Snow 2/22-2/24.

Snow Forecast

2/11-2/13:

Inches of total snow 2/11-2/13.

2/14-2/20:

Inches of total snow 2/14-2/20.

Northeast, 2/11-2/20:

Inches of total snow 2/11-2/20.

For more analysis please watch my forecast video:

Western Storm System Next Week

Tomer’s Take

  • 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.

Infrared satellite and storm track, 2/10/2022 5am.

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.

Forecast pressure anomalies valid 2/20/2022, GFS interpretation.

Snow Forecast

2/10-2/13:

Inches of total snow 2/10-2/13.

2/14-2/19:

Inches of total snow 2/14-2/19.

Northeast, 2/10-2/19:

Inches of total snow 2/10-2/19.

For more analysis please watch my forecast video: