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

Heavy snowfall and strong and sustained winds in the last several days have created very dangerous avalanche conditions in the backcountry. There is a HIGH (4) avalanche danger and you should not venture into avalanche terrain today.... Easily triggered, dangerous and destructive avalanches 2 to 5 feet deep or deeper and very broad are likely on slopes steeper than about 30 degrees in the region... We recommend that you avoid backcountry travel.


The strongest yet in a productive series of Pacific storms slammed the Central Bear River Range with way too much heavy snow and sustained northwest winds over the weekend... It was just enough loading to put the fragile snowpack "over the edge" on many slopes...I urge that you stay clear of and out from under all steep slopes and obvious or historic avalanche paths today.

The Tony Grove Snotel reports a storm total of 4.8 inches of water equivalent accumulated since the 18th. Much of that came over the weekend with 2.9 inches of water (and around 2.5 feet of snow) reported in the last 72 hours. With 74 inches of total snow on the ground, the station now sits at 60% of normal water content for the date....It's 10 degrees at the 9700' Campbell Scientific weather station on Logan Peak, and the wind sensor appears to be rimed....


Sadly, I must report the first avalanche fatality of the season, which occurred yesterday in backcountry terrain north of the Snowbasin resort. Several avalanches occurred in the steep Hell's Canyon area, sharing run-out paths, and since the 40-year-old victim was alone at the time of the fatal avalanche, it is unclear exactly which one killed him....More information posted here.

Too much avalanche activity was reported to the Utah Avalanche Center in the last several days, with several people in the backcountry caught, carried and injured in large and scary avalanches. Yesterday, and handfull of huge and unsurvivable triggered avalanches were reported... Friday, in the backcountry near Brighton Ski Area, a close call was reported, with the total burial of a skier who was recovered by his partner using a beacon.

Locally; Yesterday a natural avalanche at 10:30 in the morning in Logan Canyon near Temple Fork crossed both lanes of highway 89 and shut down traffic for a while.. Saturday afternoon, a snowboarder remote triggered a scary avalanche in Beaver Canyon just above Logan Canyon Highway and a bit south of the parking pull-out used for Beaver backside runs...The dangerous avalanche on an east facing slope at around 6900' looked to be at least 2 feet deep..On Thursday a snowboarder was caught a carried in an avalanche in the Mount Naomi Wilderness.

2010 is so-far quite an active year for avalanches in the backcountry around Logan...Here's an updated local backcountry avalanche list:


      Over the next 24 hours.

Deep hard slab avalanches could step down to weak snow near the ground and be very broad and destructive. Smaller avalanches overrunning slopes with deeply buried weak snow could produce a much larger and more dangerous avalanche. In today's conditions, you are likely to trigger avalanches from a distance, or worse, from below.


      Over the next 24 hours.

Heavy and drifted new snow overloaded slopes plagued by existing weak sugary layers, and very dangerous persistent slab avalanches are again likely today...Easily triggered persistent slab avalanches are likely at all elevations and on steep slopes facing most directions with significant deposits of new and especially wind drifted snow.


Snow showers should taper off in the mountains today as a short-lived high pressure system builds over the region today...Light snow is possible tomorrow as the next splitting wave of Pacific storminess impacts the region on Tuesday. Despite the southerly track of the storm energy, widespread snow across the north is apparently possible, and we could pick up a few more inches of snow.


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

Consider purchasing some Beaver Mountain lift tickets here from our good friends at Backcountry.com in partnership with Ski Utah. All proceeds benefit the Friends of the Utah Avalanche Center.

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

Send us your avalanche and snow observations. You can also call me at 435-757-7578 or the SLC office at 800-662-4140, or email to uac@utahavalanchecenter.org

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

I will update this forecast Wednesday morning. Thanks for checking in....

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.