Forecast for the Uintas Area Mountains

Craig Gordon
Issued by Craig Gordon for
Friday, January 18, 2019
HEADS UP... IT'S GAME ON AND DANGEROUS AVALANCHE CONDITIONS EXIST
In the wind zone at and above treeline the avalanche danger is HIGH. Both human triggered and natural avalanches are LIKELY on all steep wind drifted slopes, especially those facing the north half of the compass and particularly those with an easterly component to their aspect.
In steep terrain at mid and lower elevations, you'll find CONSIDERABLE avalanche danger and human triggered avalanches are PROBABLE.
In either case, any avalanche that breaks into deeper buried weak layers near the ground will result in a deep, scary, dangerous, and potentially unsurvivable avalanche.
Here's your exit strategy... if you're looking for LOW avalanche danger, simply head to lower elevation south facing terrain or big open meadows with no steep terrain above or connected to where you're traveling.
Low
Moderate
Considerable
High
Extreme
Learn how to read the forecast here
Avalanche Warning
THE FOREST SERVICE UTAH AVALANCHE CENTER IN SALT LAKE CITY HAS CONTINUED A BACKCOUNTRY AVALANCHE WARNING.
* TIMING...FRIDAY MORNING THROUGH THE MLK HOLIDAY WEEKEND.
* AFFECTED AREA...THE MOUNTAINS OF NORTHERN AND CENTRAL UTAH, TO INCLUDE THE BEAR RIVER RANGE, THE WASATCH RANGE, THE WESTERN UINTAS, AND THE MOUNTAINS OF THE MANTI-SKYLINE PLATEAU.
* AVALANCHE DANGER...THE BACKCOUNTRY AVALANCHE DANGER WILL REACH HIGH ON MANY ASPECTS AND ELEVATIONS WITH BOTH NATURAL AND HUMAN TRIGGERED AVALANCHES LIKELY.
* REASON/IMPACTS...HEAVY SNOW AND STRONG WINDS HAS CREATED DANGEROUS AVALANCHE CONDITIONS.
AVOID BEING ON OR BENEATH STEEP SLOPES.
Weather and Snow
Wow.... what a storm for the eastern front! Heavy snow kicked in mid morning Thursday and continued throughout the day, stacking up an evenly distributed 18" of snow. The bigger news are the water numbers and it appears nearly 2" of snow water equivilant (SWE) has accumulated in the past 24 hours, huge amounts for the Uinta's. This morning, skies are mostly cloudy and temperatures in the teens and low 20's. Winds are just starting to shift to the west and northwest and blow in the 30's and 40's along the high ridges. Riding and turning conditions could be a bit funky up high, so the only place to be today is low elevation, low angle, wind sheltered terrain.
Above is hourly data from Trial Lake (9,945')
We lost comms with Windy Peak (10,662') around noon yesterday, but you can see the trend. To view more regional weather stations click here.
Recent Avalanches
It was sorta rugged on the ridges yesterday and obs are slim. However, Dave and Chris braved the winds and confirm winds have changed the landscape, making today's drifts more widespread and more connected.
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Avalanche Problem #1
Persistent Weak Layer
Type
Location
Likelihood
Size
Description
Make no mistake.... this is a dangerous setup and the exact type of conditions when most avalanche accidents occur. Now, the most important thing is returning to our families at the end of the day and the way to accomplish this is by exercizing some patience and allowing the snowpack to adjust to the yesterday's onslaught of snow, water, and wind. Look, it's no mystery what's going on here and recent snowpack history reveals that each time our pack has received a big thump of water, snow, and wind, dormant weak layers of snow have roared back to life. What we see are avalanches breaking deeper than we might expect, particularly in terrain facing the north half fo the compass where the snowpack is thin and weak. All we need to do is find one weakness, maybe around a bush or rock that we can't see buried underneath the snow, collapse the pack, and now we've triggered a slide that quickly gets out of hand. So here's the deal... we've got to think about not only the snow riding in, but also the snow we're riding on.
Now here's where it gets complicated- this setup isn't going to magically heal itself overnight, so avoidence is the key for the next few days. Simply avoid being on, underneath, or connected to steep slopes, especially those facing the north half of the compass. And here's your exit strategy... great riding conditions exist on low angle, low elevation slopes facing the south half of the compass. Done and done.
In the video above, Andy's snowpit stability test reveals a failure near the early January snow which has faceted. Add yesterday's big storm and you can clearly see how any slide that breaks to this layer is gonna be deep and dangerous.
Avalanche Problem #2
Wind Drifted Snow
Type
Location
Likelihood
Size
Description
The good news is... yesterday's wind drifts were mostly confined to the upper elevations, forming on the leeward side of ridges and around terrain features like chutes and gullies. The bad news... southerly winds blew in the 30's and 40's, the perfect threshold to load leeward slopes, allowing wind drifts to become more connected. That means today's drifts have the possibility of breaking deeper and wider than you might expect. Today you'll want to utilize all the awareness tools in your quiver. Look for obvious clues to unstable snow like shooting cracks out in front of our skis, board, or sled. Also remember to avoid any fat, rounded piece of snow especially if it sounds hollow like a drum. And finally the hugest clue... recent avalanches on the same kind of terrain you want to ride on.
Avalanche Problem #3
New Snow
Type
Location
Likelihood
Size
Description
Just the sheer amount of fresh snow warrants a mention of new snow avalanches even down to the lower elevations.
Additional Information
Snow showers continue through mid morning before tapering off in the afternoon. High temperatures climb into the mid and upper 20's and northwest winds blow in the 30's and 40's along the high peaks. Under clearing skies, overnight lows dip into the teens. Partly cloudy skies are on tap for Saturday with another storm slated for Sunday and Monday.
General Announcements
The information in this advisory expires 24 hours after the date and time posted, but will be updated by 7:00 AM Saturday January 19th, 2019.
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.