Forecast for the Uintas Area Mountains
Issued by Craig Gordon for
Monday, December 20, 2021
Monday, December 20, 2021
Heads up... it's tricky out there!
A CONSIDERABLE avalanche danger is found on steep, wind drifted, mid and upper elevation slopes, particularly those facing the north half of the compass and human triggered avalanches are LIKELY. Once initiated, even a small slide will quickly get out of hand, especially if it breaks to old, October snow. It'll be packing a punch and it's gonna boss you around.
You'll find MODERATE avalanche danger below treeline. While slightly more manageable, even lower elevation, shady terrain is getting in on the act and human triggered avalanches are POSSIBLE on steep, wind drifted slopes.
I know you're looking to avoid the avalanche dragon today, so the ticket is to simply switch aspect or lose elevation and set your sights on terrain that was bare prior to last weeks big storm. You'll find generally LOW avalanche danger on slopes with these characteristics.
Low
Moderate
Considerable
High
Extreme
Learn how to read the forecast here
Special Announcements
Just 'cause you can see it from the road doesn't necessarily make it safe and Wolf Creek Pass is a perfect example. The weekend crew did it right by stacking tracks in the sunny bowl with no old snow issues, while avoiding the temptation to dive into the steep, shady bowl where the dangerous Avalanche Dragon or Persistent Weak Layer (PWL) is found... nice work!
Weather and Snow
NOWCAST-
High clouds drifted into the region overnight, keeping temperatures at bay, currently registering in the teens and mid 20's. Southerly winds bumped into the 20's and low 30's early Sunday, took a break for dinner, but are back at it again early this morning. Riding and turning conditions continuing improving with each storm and now we've got a respectable base which averages close to 30" in most upper elevation areas.
FORECAST-
High pressure hangs tough through Wednesday. We'll see mostly sunny skies, temperatures climbing into the 30's, and southwest winds blowing in the mid 20's and 30's along the ridges. Overnight temperatures dip into the low to mid 20's.
FUTURECAST-
A change in the weather is still on tap for Thursday with best chances for significant snow slated for late Thursday into Friday.
Looking for real-time temps, snow, or wind?
Click HERE and then on the "western Uinta" tab for western Uinta specific, weather station network.
Recent Avalanches
Ted was in Whitney Basin Sunday and reports widespread natural avalanching on many steep, northerly facing slopes like in the image above from Double Hill. The snowpit profile to the right, reveals there's no mystery to our snowpack structure... that's a lot of strong snow resting on a weak basement. Ted's got a great write up of his travels found HERE. In addition, there's no shortage of both human triggered and natural avalanches from last weeks storm and an updated list is found HERE
Observations, trip reports, and avalanches found here.
Your input is vital and we're interested in what you're seeing. Please contribute to this great community resource and go here to fill out an observation.
Avalanche Problem #1
Persistent Weak Layer
Type
Location
Likelihood
Size
Description
On Saturday, Andy and Joey stomped around the south half of the range and have an excellent observation from their travels found HERE. Above, Andy pretty much sums up what's going on with our dangerous, strong snow over weak snow setup.
With a little new snow on top of our structurally challenged snowpack it's gonna be easy to get lured into a false sense of security. However, we need to think not about the snow we're riding in, but also the snow we're riding on. And it's so deceptively tricky because a strong, cohesive slab rests on fragile, old October snow... or what we call a persistent weak layer (PWL). This is always a dangerous combination in our mountains because the stronger snow feels bomber under our skis, board, or sled. It often allows us to get well out onto the slope before the weak layer fails (usually around a bush or rock we can't see under the snow), the avalanche breaks above us, and now the entire seasons snowpack crashes down on top of us. The most likely place to encounter this avalanche dragon is on steep, mid and upper elevation slopes facing the north half of the compass, especially terrain that harbors old, October snow.
But here's the good news... it doesn't mean we can't ride. It does mean we need to avoid terrain with these characteristics. You can have a blast in a big open meadow or on low angle terrain with no steep slopes above or adjacent to you... done and done :)
Avalanche Problem #2
Wind Drifted Snow
Type
Location
Likelihood
Size
Description
The past few days saw a bump in southwest winds and a few shallow winds drifts formed along the leeward side of upper elevation ridges. But the bigger news is last weeks big wind. Southerly winds raged before, during, and after our big midweek storm, stripping most windward (south facing) slopes to bare ground and depositing that snow to the leeward (northerly facing) side of mid and upper elevation ridges and around terrain features like chutes and gullies. But here's the problem... now all those dense, hard wind drifts are now camouflaged under Friday's snow that fell straight out of the sky and they'll be harder to detect. So let's not try to overthink this one. Keep it simple and simply avoid any steep slope facing the north half of the compass, especially if it appears fat and rounded or sounds hollow like a drum. And remember- any avalanche that initiates in the new snow may break deeper and wider as it crashes down on the slope below, creating a larger slide than you might expect.
Additional Information
Your observations are important, so please let me know what you're seeing... click HERE and contribute to this amazing community based program
General Announcements
The information in this forecast expires 24 hours after the day and time posted, but will be updated by 07:00 Tuesday December 21st.
Before it gets too crazy, now is the time to book an avalanche awareness presentation for your group, club, or posse. You can reach me directly at 801-231-2170 or [email protected]
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.