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Forecast for the Salt Lake Area Mountains

Drew Hardesty
Issued by Drew Hardesty on
Sunday morning, February 9, 2020
A MODERATE danger exists on all aspects and elevations. Human triggered avalanches 1-3' deep are possible. Those thinking that Moderate is the new Low might come away surprised today. Evaluate snow and terrain carefully.
Hot Tip! Low angle terrain is just as much fun as steep terrain right now.
Low Risk-High Reward
Low
Moderate
Considerable
High
Extreme
Learn how to read the forecast here
Special Announcements
Discounted lift tickets - Thanks to the generous support of our Utah ski resorts and Ski Utah, all proceeds from these ticket sales go towards paying for avalanche forecasting and education! Get your tickets here.
Looking to improve your avalanche skills? We are offering a Backcountry 101: Introduction to Avalanches class at Powder Mountain February 14-15.

Forecaster Trent Meisenheimer will be giving a talk on the "State of The Wasatch Snowpack" at the Black Diamond Retail Store in Millcreek - Feburary 13th, from 7:00-8:30 pm.
Weather and Snow
A pretty wild week, even by Wasatch standards.
It's a beautiful morning. Skies are partly cloudy with light northeast winds. Temperatures are in the upper single digits up high; the mid teens down low. There's a full moon.
Snow surface conditions are wildly variable - some areas are supportable/breakable crust, some are like a backcountry groomer, but without the corduroy. Travel is fast and easy.
Many snow surfaces are lined with - what - rime, graupel, freezing rain....and probably now capped by surface hoar in some areas. Jim Steenburgh goes into greater detail in his blog post HERE.. The relationship between the world and the atmosphere is nearly always fascinating...

Rough 48 hour storm totals from Wednesday evening through Friday evening are below. Amazing.
  • Little Cottonwood Canyon: 30"-41" of snow (5.52" - 6.79" water)
  • Big Cottonwood Canyon: 12"-18" of snow (2.25" - 3.50" water)
  • Park City Ridgeline: 9"-13" of snow (1.50" - 2.05" water)
  • Ogden area mountains: 7"-16" of snow (1.95" - 2.88" water)
  • Provo area mountains: 5" (1.25" water)

  • Our Week in Review highlighting weather and avalanche activity over the past week can be found HERE.
Recent Avalanches
I don't want to encourage more congestion in the Cottonwood Canyons, but it is worth the drive to look at the sheer destruction and debris piles on both sides of Little Cottonwood Canyon road. UDOT folks told me that with all the snapped trees, it smelled like Christmas up there. It's a sight to behold. Video courtesy of UDOT. Take a minute to thank all the snow and road professionals - it's been quite the week.
Ski area control teams found generally stubborn avalanche conditions yesterday but were able to trigger - primarily with airblasts - soft and hard slab avalanches up to size 2 and size 3 (large enough to bury a person or a vehicle).
In the backcountry, cornice fall triggered two notable avalanches along the Park City ridgeline. At least one (Pointy Peak) failed at last weekend's facet/crust interface.
Mark White noted another glide avalanche release on the Diving Board in Broads Fork at 10,700' east facing.
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Avalanche Problem #1
New Snow
Type
Location
Likelihood
Size
Description
Avalanches may still be triggered on all aspects and elevations generally 1-3' deep. It may take a more significant trigger (cornice fall, skier or snowmobile launching off a jump, etc), but avalanches may still run at last weekend's interface or within the storm snow. Fracture line profiles and snow tests by experienced observers point to these failure planes. Note that these avalanches may be more pronounced along the Park City ridgeline and along the periphery of the Cottonwoods and/or at the mid and low elevations.
TREND: Decreasing danger
Avalanche Problem #2
Wind Drifted Snow
Type
Location
Likelihood
Size
Description
A few hours of strong upper elevation winds from the northwest yesterday require a mention of wind drifts along the mid and upper elevations. These drifts will be more prominent on north to east to south facing slopes. Shooting cracks up to 50' wide were noted yesterday in wind loaded terrain.
TREND: Decreasing danger
Additional Information
A storm system to the south of us is dropping south and west and we'll be under a cool north to northeast flow through the early part of the week. Expect partly cloudy skies and generally benign weather. The northeast winds may be gusty at times. Ridgetop temps will be in the low teens and single digits over the next several days. The GFS brings a storm in on Valentine's Day, but the European model is not as optimistic. More tomorrow.
General Announcements
This information does not apply to developed ski areas or highways where avalanche control is normally done. This forecast is from the U.S.D.A. Forest Service, which is solely responsible for its content. This forecast describes general avalanche conditions and local variations always occur.