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Advisory: Uintas Area Mountains

Forecast for the Uintas Area Mountains

Craig Gordon
Issued by Craig Gordon on
Tuesday morning, February 27, 2018

Heads up- the avalanche danger might be slightly more pronounced from about Trial Lake to Strawberry.

In upper elevation terrain, especially in the wind zone at and above treeline, the avalanche danger is CONSIDERABLE. Human triggered avalanches are LIKELY on steep wind drifted slopes facing the north half of the compass, particularly those with an easterly component to their aspect. An avalanche triggered today can quickly get out of hand if it breaks into weak layers of snow, now buried deeper in our snowpack.

MODERATE avalanche danger exists at mid elevations and human triggered avalanches are possible on steep slopes with recent deposits of wind drifted snow.

Lose some elevation or switch aspect and you'll find LOW avalanche danger on lower elevation, wind sheltered terrain and on most slopes facing the south half of the compass.

Low
Moderate
Considerable
High
Extreme
Learn how to read the forecast here
Weather and Snow

Skies are cloudy and light snow showers developed overnight, but much of the action is veering to the north of us. Southerly winds are humming along in the upper 20's and 30's along the high ridges and temperatures are in the low teens. Recent winds have damaged some of our upper elevation terrain, but lose a little elevation and head to low angle, wind sheltered slopes and you'll be treated to some of the best riding and turning conditions all year.

Above are 24 hour temperatures and snow depth from upper Trial Lake along with winds and temperatures from Windy Peak. More remote Uinta weather stations are found here

You can find a great body of recent trip reports, observations, and snow data here.


Recent Avalanches


Micheal J was in Weber Canyon Sunday and triggered this avalanche on a steep, northeast facing slope. The avalanche was 18" deep and about 200' wide, breaking deeper and wider than he expected... an unmanageable slide failing on weak facets below the late January rime crust. Micheal provides us solid intel on the snowpack and his valuable insight on things is found here.

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Avalanche Problem #1
Persistent Weak Layer
Type
Location
Likelihood
Size
Description

Dormant weak layers in the snowpack are starting to come to life as new storm snow stacks up. Since last Sunday an active storm pattern has added close to 2' of snow to our snowpack and there are a few weak layers that have come out of hibernation. First... facets below a thin rime crust formed in late January have reacted to the additional weight of riders and this combo is responsible for several recently triggered slides. This structure may be more prevelant in Weber Canyon than some of the other terrain throughout the range.

Second area of concern is... terrain that harbors weak snow. Prime suspects include terrain that has already avalanched this year along with a vast majority of steep, shady slopes on the south half of the range. Terrain with these characteristics remains suspect and should be considered guilty until proven otherwise. Sounds complicated, but the answer is easy. The way we manage unpredictable avalanche dragons is to simply avoid where they live. So today you'll want to steer clear of steep, rocky, wind drifted slopes, especially if they've got a "trapdoor" or punchy feeling.

Avalanche Problem #2
Wind Drifted Snow
Type
Location
Likelihood
Size
Description

Winds have been busy at work the past few days, blowing steadily along the high ridges. With no shortage of snow avaialable to work with, the landscape is changing and fat drifts sensitive to our weight continue forming along the leeward side of upper elevation ridges. Today's drifts may break into several storms worth of snow and once triggered, they'll pack a punch and could definately boss you around. You can ride safely today by... being on the lookout for clues to unstable snow such as shooting cracks. In addition, tweak small test slopes like road banks and see how they're reacting before getting into steep, commiting terrain. And finally, consider avoiding fat, rounded pillows of snow, especially if they sound hollow like a drum.

Crackes shooting out in front of you are a huge red flag and solid clue of unstable snow.

Additional Information


Expect mostly cloudy skies this morning with a scattered snow shower or two. Highs reach into the mid 20's with overnight lows in the teens. Southerly winds blow in the upper 30's along the ridges, but should decrease as the day wares on. Wednesday and Thursday are the calm before what looks like a solid shot of snow for late in the week. Details on timing are still emerging and I'll have a better idea on what to expect for tomorrows update.

General Announcements

The information in this advisory expires 24 hours after the date and time posted, but will be updated by 7:00 AM Wednesday February 27th, 2018.

If you're getting out and about, please let me know what you're seeing especially if you see or trigger and avalanche. I can be reached at [email protected] or 801-231-2170

It's also a good time to set up one of our very popular avalanche awareness classes. Reach out to me and I'll make it happen.

This information does not apply to developed ski areas or highways where avalanche control is normally done. This advisory is from the U.S.D.A. Forest Service, which is solely responsible for its content. This advisory describes general avalanche conditions and local variations always occur.