Logan Avalanche Advisory

Forecaster: Toby Weed


Dangerous avalanche conditions are occuring or are imminent. Backcountry travel in avalanche terrain is not recommended.

New snow accumulations have overloaded preexisting weak snow causing both natural and human triggered avalanches. There is a HIGH avalanche danger in the backcountry. More snow is expected throughout the day today and into Monday and this will keep the danger High. People without expert level snowpack assessment and backcountry travel skills are urged to stay out of the backcountry.


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

Danger Rose Tutorial

There is a HIGH (4) avalanche danger at upper elevations in the backcountry, and dangerous natural and human triggered avalanches are likely. Continued heavy snowfall and increasing winds will keep the danger level high throughout the day...

Dangerous avalanche conditions at upper and mid-elevations dictate that we stay away from and out from under steep slopes and obvious or historic avalanche paths today..


If we were to head out we might find rather heavy inverted new snow on top of nasty sugary facets....

Although a few parties did apparently drive up to the lake yesterday, you might not make it today.....Be prepared for full-on winter conditions and more incoming stormy weather. Driving conditions may deteriorate rapidly....

Might not be a bad time to get the sled out, but the snow is still real shallow and baseless off trail. Definitely not a good day for hill-climbing with a HIGH avalanche danger on snow covered upper elevation slopes…….Remember to slow down and watch out for pedestrians, especially in congested areas like Tony Grove.


I received reports of triggered soft slab and significant sluffs yesterday in steep terrain south of Tony Grove Lake…. Numerous reports of sensitive conditions, with both intentional and unintentionally triggered avalanches reported across the Utah Mountains yesterday.

Observers reported collapsing, cracking, wind loading, and avalanche activity yesterday... These are all bad signs...

Natural and human triggered avalanches are likely today as heavy snow and increasing winds pile onto slopes with very weak preexisting snow.


      Over the next 24 hours.

The danger of fresh wind slab and storm snow avalanches will continue to rise with snow accumulation and increasing wind this morning.....Significant natural activity has been reported from overnight in the Wasatch Range and much of this looks to have involved new snow failures....


      Over the next 24 hours.

Ugly faceted snow plagues most upper and mid elevation slopes, and new slabs built by significant heavy snow has caused an unstable snow structure and a drastic increase in avalanche danger….........


The National Weather Service has continued a Winter Storm Warning for our region through tomorrow morning.....Expect continuing heavy snowfall and increasing southwest winds today, tapering into tonight.....Expect the heaviest period of precipitation to occur early this afternoon....Snowfall should become showery overnight with diminishing west winds...Looks like a short lived high pressure will develop over the region Monday and Tuesday, but expect showery, on and off snow in our mountains.....


I will be issuing morning avalanche advisories for the Logan area on Mondays, Wednesdays, Fridays and Saturdays.

Our web site is now formatted for iPhone. You can also download a free iPhone application from Canyon Sports to display the Bottom Line. Search for Utah Avalanche on the Apple's iPhone Apps page or in iTunes.

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

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. 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.

We appreciate avalanche and snow observations. If there’s something we should know about, especially if you see or trigger an avalanche in the backcountry, please give us a call at (435-)755-3638 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.

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.