Logan Avalanche Advisory

Forecaster: Toby Weed


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

Danger Rose Tutorial

The danger is LOW on most slopes in the region, mainly due to very shallow snow cover.

At the same time, there are pockets with a MODERATE danger, and you could trigger wind slab avalanches on exposed upper elevation slopes steeper than about 35 degrees. With significant snowfall, winds, and warmer temperatures in the forecast, we expect the danger to rise significantly and become more widespread over the weekend in the backcountry.


Insignificant snowfalls, very cold temperatures, and fairly strong and sustained winds combined to make conditions interesting in the very limited, upper elevation terrain that has enough snow to keep you off the rocks.... The snow-covered road to Tony Grove Lake is not maintained in the winter, and this weekend's storm is very likely to shut it down to wheeled vehicles up high... Be prepared for full-on winter conditions and incoming stormy weather.

Shallow, early season conditions persist and riders still pretty much have to stay on snow covered upper elevation roadways. The very shallow snowcover in most areas just isn’t enough to keep you from hitting damaging and dangerous rocks hidden just under the snow surface. Remember to slow down and watch out for pedestrians, especially in congested areas like Tony Grove.


No activity has been reported in the Logan Area since last weekend, when there were a couple small avalanches triggered in the south Tony Grove Lake area....There were also a number of smallish triggered avalanches in the Central Wasatch Range, mainly in the early part of the week...

Yesterday observers reported very shallow old snow and completely baseless and rock conditions in Providence Canyon. While isolated surface cracking and localized collapsing was reported from exposed upper elevation terrain accessible from Tony Grove…


      Over the next 24 hours.

Winds in the last few days built wind slabs with the light density new snow. These slabs in many cases have formed right on top of weak faceted snow or feathery surface hoar, and you might trigger soft slabs around a foot deep on steep upper elevation slopes. I'd be especially cautious on exposed slopes and around terrain features where cross-loading has drifted-in significant snow.


      Over the next 24 hours.

Some of last week’s wind slabs formed on a persistent weak layer made up of sugary faceted old snow....Ugly facets plague most slopes and slabs built by significant heavy snow forecast for the weekend will cause an unstable snow structure and a drastic increase in avalanche danger…..


The National Weather Service has issued a Winter Storm Watch for our region.....Expect increasing clouds, southwest winds, and temperatures in the mountains today. The first round of storminess will arrive late tonight and continue into tomorrow with 6 inches to a foot of accumulation and moderately strong southwest winds forecast....

The next round, later on Sunday has the potential to be the knockout blow..........


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

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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.