Forecast for the Uintas Area Mountains

Issued by Craig Gordon for Sunday, March 27, 2022
Near and above treeline CONSIDERABLE avalanche danger exists. Human triggered avalanches failing on the midwinter drought layer (PWL) and breaking several feet deep are LIKELY and natural avalanches POSSIBLE, especially on slopes facing the north half of the compass. MODERATE avalanche danger is found below treeline and human triggered avalanches breaking to this weak layer are POSSIBLE.
South and west facing terrain has been cooked by strong sunshine, but will heat up fast this morning. As the snow becomes damp, the danger rises to MODERATE for wet loose slides and sluffs. These should be relatively small and occur predictably as the day progresses.

Scroll to the bottom for a note on slope angle and how to have a blast without entering avalanche terrain.
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Weather and Snow
High clouds drifted into the region overnight and it's downright balmy this morning with low temperatures hovering right around 40 degrees across the board. South and southwest wind bumped into the mid 20's right around lunchtime Saturday and continued in that spirit overnight and early this morning.
What a way to run a winter! Look for partly cloudy skies with high temperatures soaring into the 50's. Southwest winds blowing in the 30's and 40's near the high peaks are gonna be a nuisance this morning, but decrease as the day wares on. Expect partly cloudy skies overnight with temperatures dipping into the upper 30's.
Clouds stream into the area on Monday, southwest winds crank into the 50's, and snow showers develop late in the day. Storminess continues through Tuesday and lingers into Wednesday. Unfortunately the storm looks underwhelming, though we might be able to squeak 3"-6" out by Wednesday afternoon. There's potential for another system on Thursday.
Ouch... mud season has hit the trailheads. However, with a little hunting you can still find hot pow on upper elevation north facing slopes and I think a short-lived window of supportability exists on the sunny terrain, but it's gonna go fast today.
Trip reports and snowpack observations are found HERE.

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
Friday, avy pro Dave Kikkert captured the image above of a natural avalanche in Upper Weber Canyon and comments... "Natural that occurred between 10 and 11 am due to heating. It confirms what we have been finding: where the persistent slab problem exists (more sheltered northeast-north facing slopes), it is still quite reactive. Would expect similar in the next couple days with continued heating."

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Avalanche Problem #1
Persistent Weak Layer
We can expect more of this today. Ted was out and about in the Whitney Basin yesterday and discovered this well connected piece of snow on the lower east nose of the Humpy ridge that was triggered in the past few days. More on Ted's insight and travels found HERE
A persistent weak layer (PWL) of sugary, faceted snow is buried 1-3 feet deep. I know... I know... it's hard to believe that this layer is still alive and well, lurking in the snowpack, despite such warm weather. When you see it and feel it, it's almost shocking just how dry and loose it is (like a layer of shugga... baby :) But wait... there's more! The snowpack continues to show us that this layer will fracture and produce avalanches.
Where does it exist? It is widespread on NW-N-NE-E facing slopes near and slightly below treeline. Above treeline in alpine terrain, it's distribution is more pockety.
What will the warm weather do? For now, "all bets are off" and conditions remain dangerous. In the long run, the warmth will help this layer slowly heal. The wild card is if there's enough heat to melt snow and cause liquid water to percolate down to this layer, then natural avalanches begin peeling away from steep slopes. Or maybe we roll up on our sled, skis, or board at just the right moment and we're able to pull the rug out from underneath. In either case... no bueno.
Avalanche Problem #2
Wet Snow
Strong sunshine, very warm air temperatures and a marginal overnight refreeze, conspire to quickly soften the snow on sunny slopes. And while this terrain has experienced several melt-freeze cycles and you may find some decent, supportable corn snow, it'll be short-lived. As the snow becomes damp, small wet loose avalanches may occur this afternoon, but I don't expect them to be a widespread issue in the Uinta's that tend to stay a little cooler than the Wasatch Mountains.
Look for snowballs rolling downhill with increasing frequency as a sign of unstable snow. Typically they happen near exposed rocks or cliffs that absorb extra heat from the sun and reradiate that heat into the surrounding snow.
Additional Information
Slope angle determines where avalanches can happen and where they can't. Generally, any slope steeper than 30 degrees is where avalanches occur. This means all you need to do is ride slopes less than 30 degrees in steepness and you'll never have to deal with avalanches.
There's a catch! You can't be underneath slopes steeper than 30 degrees either, even if you're on a flat slope, because avalanches can crash down on you. It turns out that skiing or riding slopes about 25 degrees in steepness is really fun and even more fun because there's no worry of avalanches. Unfortunately, it takes a lot of practice to estimate slope angles with your eyes alone. The way to get practice and the only way to know for sure is to measure slope angles with slope measuring tool shown in the photo below, and Toby describes it in this video. There are also many apps so that you can use your phone in a similar manner.

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General Announcements
The information in this forecast expires 24 hours after the day and time posted, but will be updated by 07:00 Monday, March 28th.
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.