Avalanche Advisory
Advisory: Uintas Area Mountains Issued by Craig Gordon for Sunday - February 4, 2018 - 4:24am
bottom line

At and above treeline, in mid and upper elevation terrain, the avalanche danger is MODERATE. Human triggered avalanches are possible on steep, wind drifted slopes, especially those facing the north half of the compass and particularly those with an easterly component to their aspect. Once triggered, today's avalanches can quickly get out of hand if they break into weak layers of snow now buried several feet deep in our snowpack.

Most wind sheltered mid and low elevation terrain, especially south facing slopes offer generally LOW avalanche danger.
special announcement

There's still a few slots left. Please join us 6:00-9:00 PM, Tuesday Feb. 6th at Weller's Recreation for our Companion Rescue class. Details and registration are found here. Hurry.... operators are standing by!
current conditions

Skies are partly cloudy, temperatures in the low to mid 20's, and an inch of snow fell in the past 24 hours. Westerly winds took a lunch break yesterday, but began ramping up shortly after and have been blowing in the 30's and 40's along the high ridges since about midday. It's a mixed bag out there today... but somewhere amongst the wind blasted bowls and old tracks, soft settled snow still exists on wind sheltered, mid elevation, shady terrain.

Above are 24 hour temperatures and snow depth from Upper Moffit Basin along with winds and temperatures from Windy Peak. More remote Uinta weather stations are found here

Ted was near Lofty Lake Friday and found a thin layer of rime adhering itself to trees, structures, and the snow surface. More on his travels as well as a great body of recent trip reports, observations, and snow data found here.


recent activity


John Mletschnig was in Millcreek Thursday near Dead Man Pass and found this day old sled triggered slide which broke 3'-4' deep and approx 300' wide. More on this slide here. (Mletschnig​ photo)


And longtime listener, first time caller David Guidry spotted this slide triggered low on the slope near the Mill Hollow trailhead. Thanks Dave... I really appreciate your great info!


In addition, I spotted this recently triggered slide in Chalk Creek.

These slides follow the recent pattern of human triggered avalanches, initiated low on the slope and breaking to our midpack facet/crust weakness.
Avalanche Problem 1
type aspect/elevation characteristics
LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
over the next 24 hours
description

I was in Chalk Creek Thursday and got eyes on this day old sled triggered slide on a steep, east-northeast facing slope. All the avalanches i've seen the past few days continue in the theme of being triggered low on the slope and they're breaking above riders, who are sometimes on an adjacent slope... spooky for sure. Snowpit tests, hit or miss avalanche activity, and tracks on slopes are inconclusive and often suggest stability. That said, I wouldn't bet my life on any of these pieces of information because the biggest clues to avalanches is.... avalanches!

One thing for sure is... our persistent weakness (seen where Ted's snow saw rests in the pit above) now buried 2'-3' deep in the midpack, isn't in a hurry to heal. Once triggered, an avalanche breaking into these layers will quickly get out of hand and instantly ruin our day. The most likely suspects are steep, wind drifted slopes facing north half of the compass. Since this avalanche dragon is unpredictable, the best offense is a good defense... you simply avoid it. Swing around to lower elevation slopes or choose low angle terrain with no steep slopes above or adjacent to the slopes your riding. (Gordon/Scroggin photos)
Avalanche Problem 2
type aspect/elevation characteristics
LIKELIHOOD
LIKELY
UNLIKELY
SIZE
LARGE
SMALL
TREND
INCREASING DANGER
SAME
DECREASING DANGER
over the next 24 hours
description

Strong winds will find enough snow to whip into stiff, stubborn drifts. Found mostly on the leeward side of mid and upper elevation ridges, today you'll want to look for and avoid any fat, rounded piece of snow, especially if it sounds hollow like a drum.

weather


The area remains under a moist, northwest flow through Monday and there's a chance for light snow tonight and tomorrow. For today, look for mostly cloudy skies with highs reaching into the low 40's. Westerly winds blow in the 40's with gusts in the 60's along the high peaks. A better chance for snow slides through the region Monday night into Tuesday and that system may offer us 2"-4" of snow.

general announcements

The information in this advisory expires 24 hours after the date and time posted, but will be updated by 7:00 AM Monday February 5th, 2018.

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.