Forecast for the Uintas Area Mountains

Craig Gordon
Issued by Craig Gordon for
Sunday, February 17, 2013

A MODERATE avalanche danger is found on steep, wind drifted mid and upper elevation terrain and human triggered avalanches are possible on leeward slopes facing the north half of the compass.

In addition, there's a MODERATE danger of triggering an avalanche that breaks into deeper buried weak layers, particularly on steep shady slopes.

LOW avalanche danger is found on low angle, wind sheltered terrain, where there are no steep slopes above or adjacent to where you're riding.

Low
Moderate
Considerable
High
Extreme
Learn how to read the forecast here
Special Announcements

We installed the BCA Beacon Checker at the Soapstone Trailhead yesterday. Here, a beautiful local rider, checks that her avalanche beacon is working properly prior to getting out on the snow.

Weather and Snow

A layer of clouds slid through the region overnight, keeping temperatures rather mild. Overnight lows only dipped into the upper 20's and low 30's and that's where we sit right now. The bigger news are the southwest winds which began increasing around 6:00 last night, ramping up into the 30's and 40's since 3:00 this morning. Riding and turning conditions are a bit of a mixed bag up high, but many folks are finding great snow conditions in wind sheltered, shady terrain.

Recent observations can be found here.

Wondering why last winter was so crazy? Click here to watch the 2011-12 Utah Winter Review... an excellent recap of last years conditions.

Recent Avalanches

This wind slab formed from stiff Northwest winds during the latter half of the week. The slide was triggered Friday on the steep east-southeast face of Currant Creek Peak.

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

South and southwest winds will crank throughout the day at the upper elevations, before a cold front sweeps through the region after lunch. While most of our southerly aspects are crusty and baked by yesterday's strong sunshine, it never ceases to amaze me how winds can find snow in the most obscure places and whip up a fresh batch of wind slabs. That's gonna be today's most obvious and most predictable avalanche concern. Forming on the leeward side of upper elevation ridges and cross loaded in chutes and gullies, today's slabs won't be overly deep, widespread, or sensitive, but they do have the potential to take you for an unexpected ride. Today's slabs are found on slopes facing the north half of the compass. Look for and avoid fat looking, rounded pillows of snow, particularly if they sound hollow like a drum.

Avalanche Problem #2
New Snow
Type
Location
Likelihood
Size
Description

We might've forgotten about them, but our problem child, the January facets, aren't going away anytime soon. As a matter of fact they've been having a great time partying in our shallow snowpack, growing weak and sugary, and getting cranky when we tease them. While not widespread, avalanches breaking into this nefariously tricky weak layer aren't out of the question. It's counter-intuitive, but some of our weakest snow is found mid slope in steep, shady terrain. Best way to avoid getting tricked is to tone your slope angles down and think about not only the snow you're riding in, but also the snow you're riding on. Strong snow on weak snow is a dangerous combination and it allows us to get well out onto the slope before triggering a slide. If you feel the bottom falling out from under your machine and you're track is sinking into weak sugary snow that's a big red flag.

While not huge, this slide clearly shows the January facets still alive and well. This slide was triggered on the 13th on a steep north facing slope in upper Whitney Basin at about 10, 400' in elevation.

If you ever have questions about avalanche conditions on the North Slope... hit this guy up. Ted Scroggin knows the place like no other. Here, Ted takes a look at our pit results which failed on the January facets. The ECT column propagated with 22 taps, producing a Q1 shear. This tells us the snowpack needs a bit of a thump, but has the potential to break as a slab and with energy. Bottom line... it's a bit of a red flag.

Additional Information

A fast moving cold front sliding through the area around lunch time, delivers a quick hitting inch or two of snow before quickly moving east. West and southwest winds are gonna be irritating, blowing 25-35 mph with a few gusts in the 40's, before switching to the northwest and diminishing later today. We've already reached our high temperatures for the day and they should drop into the teens and then single digits overnight after the cold front arrives. Monday is clear and crisp with a warm windy day on tap for Tuesday ahead of a stormy period that ushers in snow from Wednesday through next weekend.

General Announcements

Remember your information can save lives. If you see anything we should know about, please participate in the creation of our own community avalanche advisory by submitting snow and avalanche conditions. You can call me directly at 801-231-2170, email [email protected], or email by clicking HERE

This is a great time of year to schedule a free avalanche awareness presentation for your group or club. You can contact me at 801-231-2170 or email [email protected]

Donate to your favorite non-profit –The Friends of the Utah Avalanche Center. The UAC depends on contributions from users like you to support our work.

The information in this advisory is from the US Forest Service which is solely responsible for its content. This advisory describes general avalanche conditions and local variations always occur.

The information in this advisory expires 24 hours after the date and time posted, but will be updated by 7:00 AM Monday February 18th with a special holiday advisory.