UDOT PLANNED AVALANCHE CLOSURES!!

Forecast for the Salt Lake Area Mountains

Nikki Champion
Issued by Nikki Champion on
Monday morning, January 18, 2021
The avalanche danger is MODERATE on all steep upper elevation slopes. The avalanche danger is also MODERATE on steep mid-elevation slopes facing west, through north, through east. Human-triggered avalanches are possible on these slopes, especially if they have a denser slab of wind-drifted snow on top of weaker, faceted snow. Any avalanche triggered could be 1-3' deep and over 100' wide. These avalanches may be triggered remotely and from lower-angled terrain below.

All other aspects have a LOW avalanche danger.
Low
Moderate
Considerable
High
Extreme
Learn how to read the forecast here
Special Announcements
Thanks to the generous support of our local resorts, Ski Utah, and Backcountry, discount lift tickets are now available. Support the UAC while you ski at the resorts this season. Tickets are available here.
Weather and Snow
This morning, under partly cloudy skies temperatures are in the low 20s F at trailheads and low teens F at upper elevations. Northwesterly winds picked up last night, peaking around 9:00 pm and gusting up to 90 mph at the uppermost elevations. The winds have decreased, and are currently blowing 25-30 mph and gusting up to 40 mph at 11,000'.
Today, a weak dry storm system will push into the region, which will bring partly cloudy skies, and the occasional light snow shower in the afternoon. The northerly winds will continue to decrease throughout the morning into the early afternoon, before ramping up and becoming easterly overnight. Temperatures will be in the mid-20s F at 9,000', and winds will average 15-25 mph and gust up to 55 mph at 11,000'.
Saturday's dusting of new snow was a huge improvement to the riding conditions, while the elevated winds likely moved around a lot of that soft snow. Improved riding conditions still exist in areas protected from the winds.
A bit of good news - if the extended weather models are correct, we have a decent looking storm slated for next weekend. While it seems like a pipe dream, we are all keeping our fingers crossed.

For interested in Wasatch weather, and don't know who Jim Steenburgh is - check out his blog HERE. If you like the weather, you will enjoy it. Fingers crossed that winter will return to the Wasatch soon.
Recent Avalanches
Yesterday there were no new avalanches reported in the backcountry.
You can find all the backcountry observations HERE.
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Avalanche Problem #1
Persistent Weak Layer
Type
Location
Likelihood
Size
Description
The main problem continues to be the poor snowpack structure that remains throughout the entire Wasatch Range, this make up of strong snow over weak faceted snow. The problem primarily exists on shady slopes at the mid and upper elevations, where a strong slab of snow can release and fail in the weak faceted snow below. Snowpit results, significantly fewer reports of cracking and collapse and lack of avalanche activity show that the likelihood of triggering an avalanche is decreasing, however, it is still not zero.
We get it, the best coverage and riding seems to be in steep north-facing terrain. While it could be the best riding, this terrain is exactly where the avalanche danger is heightened. As soon as you decide to ride steep northerly facing terrain at the mid and upper elevations, you are rolling the dice as triggering a slab avalanche 1-3’ deep remains possible. This is just the type of problem I don’t want to test the boundaries of, my strategy will be to continue avoiding this steep terrain until the weak layer of faceted snow is buried so deeply that it no longer is a problem, or melts in the spring - whichever comes first.
Another thing to think about: While we haven’t had a large snow load on the weak faceted snow in over a week, wind drifted snow can act as a load to the snowpack - even when it’s not snowing. Over the past 5 days, we have had high winds and increased wind loading. Anywhere recently wind drifted snow sits atop the weak faceted snow will have an increased load.
Avalanche Problem #2
Wind Drifted Snow
Type
Location
Likelihood
Size
Description
Last night the Northwesterly winds were cranking, with gusts near 90 mph at the highest ridgelines. While there wasn’t a ton of new snow to move around, with such high winds any snow that was available to be transported, will be transported at the mid and upper elevations. The winds have primarily been north and northwesterly, but sustained high winds can deposit snow around terrain features on almost any aspect. For this reason, I would expect to find sensitive slabs of wind drifted snow at all upper elevation slopes, especially along with terrain features such as ridgelines, sub ridges, and gullies.
The winds have backed off this morning, but even with a few elevated gusts throughout the day, these slabs will become more firm and cohesive. This can allow you to travel out farther onto the slope before it breaks, and can fail larger and wider than expected. Triggering an avalanche that initially fails in the wind-drifted snow will likely break down more deeply into the weak faceted snow below.
Today continue to look for slopes with any signs of wind drifted snow, such as cracking, hollow noises, and pillow-shaped snow, and avoiding those slopes.
General Announcements
Please visit this website with information about Responsible Winter Recreation by the Utah Office of Outdoor Recreation.

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.