Salt Lake Avalanche Advisory

Forecaster: Brett Kobernik

SPECIAL ANNOUNCEMENT

We're going to keep it simple today.  A SPECIAL AVALANCHE ADVISORY is in effect for the mountains of northern Utah.  In terrain above about 8000 feet that faces west through north through south east, natural avalanches are possible and human triggered avalanches are almost certain on numerous slopes. 


BOTTOM LINE

Danger by aspect and elevation on slopes approaching 35° or steeper.
(click HERE for tomorrow's danger rating)


Danger Rose Tutorial

We feel that human triggered avalanches are almost certain on numerous slopes above about 8000 feet facing west through north through southeast.  The avalanche danger remains HIGH on many of these slopes.  Avalanche path runnout zones should be avoided today.  Only people with top notch avalanche and snowpack assessment skills should attempt travel into avalanche terrain today.


CURRENT CONDITIONS

We have partly cloudy skies, temperatures in the single digits to around zero, decreasing westerly winds and no new snow overnight.


RECENT ACTIVITY

Ski resorts continued to get sizable avalanches during control work on Saturday.  Four more large avalanches were triggered by people in the backcountry.  Locations include Yellowjacket, Alexander Basin, West Monitor and one near Summit Park.  All the backcountry avalanches involved the weak faceted basal layers of snow that we keep beating like a dead horse.

More details:

Saturday's Avalanches

Photo from near Summit Park

Photo from Yellowjacket

Thoughts on creep rates


THREAT #1

WHERE PROBABILITY SIZE TREND
      Over the next 24 hours.

I'll beat the dead horse a bit more this morning by once again saying that avalanching into weak faceted snow near the ground is the biggest concern.


THREAT #2

WHERE PROBABILITY SIZE TREND
      Over the next 24 hours.

Fresh wind drifts that were sensitive on Saturday may again be today but are only a secondary problem to a deeper release.  These wind drifts just compound the problem with the deeper weakness.


MOUNTAIN WEATHER

A brief warm up is the big news weather-wise today.  Temperatures will jump 20 degrees in some locations from the single digits into the mid 20s.  Westerly winds will be managable averaging 5 to 15 mph along the ridges switching more to the south and increasing tonight ahead of a storm that will move through tonight into Monday.   This next storm looks like it will pack a decent punch and produce around a foot of snow or better.  Weather models show periods of snow currently through the 28th.


GENERAL ANNOUNCEMENTS

If you want to get this avalanche advisory e-mailed to you daily click HERE.

The Wasatch Powderbird Guides - for information, call them at 801-742-2800 or go to their daily blog

UDOT highway avalanche control work info can be found by calling (801) 975-4838. Our statewide toll free line is 1-888-999-4019 (early morning, option 8).

The UAC depends on contributions from users like you to support our work.  To find out more about how you can support our efforts to continue providing the avalanche forecasting and education that you expect please visit our Friends page.

If you’re getting out and see anything we should know about please let us know.  You can leave a message at (801) 524-5304 or 1-800-662-4140, or email us at uac@utahavalanchecenter.org. (Fax 801-524-6301).

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

Bruce Tremper will update this forecast by 7:30 on Monday morning.


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.


This advisory provided by the USDA Forest Service, in partnership with:

The Friends of the Utah Avalanche Center, Utah Division of State Parks and Recreation, Utah Division of Emergency Management, Salt Lake County, Salt Lake Unified Fire Authority and the friends of the La Sal Avalanche Center. See our Sponsors Page for a complete list.