Forecast for the Logan Area Mountains

Toby Weed
Issued by Toby Weed for
Wednesday, February 6, 2013

Overall, there is a MODERATE (level 2) danger in the backcountry. Heightened avalanche conditions exist, and you could trigger large unmanageable avalanches on isolated slopes. Localized dangerous avalanche conditions still exist in some areas, and there is a CONSIDERABLE (or level 3) danger on steep outlying slopes with poor snow structure. Dangerous and potentially deadly triggered persistent slab avalanches are possible, mainly on drifted slopes at upper elevations that weren't all tracked up in early January. Loose wet avalanches are possible on sunny slopes and lower elevations. Evaluate the snow and terrain carefully, use safe travel protocols, and make conservative decisions regarding your route.

Low
Moderate
Considerable
High
Extreme
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Weather and Snow

The Tony Grove Snotel at 8400' reports 27 degrees, there is 56 inches of total snow, and 67% of average water content for the date. It's 18 degrees at the CSI Logan Peak weather station, with 20 mph northwest winds. The best snow conditions are found in sheltered shady terrain at mid elevations, where you might find some nice fast re-crystallized powder and sparkly frost crystals or surface hoar. Most areas sport less desirable conditions, with breakable sun-crusts on sunny slopes, rime-crust at upper elevations, and wind-jacked snow in exposed terrain..

Recent Avalanches

There were many close calls over the weekend in the Utah backcountry, with way too many people taken for dangerous rides in avalanches they or someone in their party triggered. Several people ended up partially buried and a couple fully buried, thankfully rescued quickly by members of their party or others nearby. There were also a couple injuries. Luckily, or miraculously, nobody was killed. Bruce Tremper published a telling blog...... HERE

Locally; Riders remote triggered a large and dangerous avalanche in a popular area above the Tony Grove Lake Campground over the weekend, I think on Sunday. The unreported 2' deep avalanche on a steep north-northeast facing slope at around 8400' in elevation was at least 250' wide, and it ran violently through thick trees down into the campground. Link HERE. and check out the video ....Please remember to report avalanches you see in the backcountry, the information you provide could save lives..

On Friday in the Monte Cristo Area in the Ogden Area Mountains, a rider was completely buried in a 400' wide persistent slab avalanche he triggered from low on the slope. His well trained companions were able to locate and extricate him quickly from a four-foot-deep burial. click HERE

I continue to receive reports of, and I have observed, extensive audible collapsing or whumpfing from across the Bear River Range. This indicates the presence of unstable snow and potential avalanches.

Here's a link to our updated avalanche list...

Ad
Avalanche Problem #1
New Snow
Type
Location
Likelihood
Size
Description

Avalanches might fail 1 to 3 feet deep in drifted terrain on very weak faceted snow created during the drawn-out January high pressure systems. Drifted areas plagued by the shallowly buried January 8 rime-crust , which is intact and fairly widespread in the region, and weak faceted snow associated with it are most suspect. The preexisting snow on shady mid elevation slopes is especially weak, and avalanches could occur on drifted slopes in unexpected areas on slopes approaching or steeper than 35 degrees. The danger is pockety, meaning many slopes are fairly stable, but slopes with unstable snow exist and are interspersed. Slopes that were heavily tracked in early January, when the weak layer was forming, tend to be more stable than slopes that were largely untracked, giving us a false sense of stability in more popular areas. In these conditions, you could trigger avalanches in some areas remotely, from a distance or worse, from below. Audible collapsing or whumpfing, recent avalanches, and cracking are red flags indicating instability...

Avalanche Problem #2
Wet Snow
Type
Location
Likelihood
Size
Description

Loose wet avalanches are possible on steep sunny and low elevation slopes...

Additional Information

Expect fair weather in the mountains today, mostly sunny with some cloudiness. High temperatures at around 8500 are expected to be around freezing, and there will be a moderate west-northwest breeze.. Temperatures are expected to gradually decline. Clouds will start moving into the region tomorrow ahead of the next round of storminess, which will bring snow to the mountains Friday and Saturday. South winds may become easterly for a while tomorrow in advance of the storm. The approaching weather system should clear the smog out of the Cache.

Check out the new Logan Mountain Weather page...

General Announcements

The infamous annual CROWBAR backcountry ski race is scheduled for Saturday, February 23 in Beaver Creek Canyon. Click HERE for more details...

For a printer friendly version of this advisory click HERE

Remember your information from the backcountry can save lives. If you see or trigger an avalanche, or see anything else we should know about, please send us your snow and avalanche observations. You can also call us at 801-524-5304 or email by clicking HERE. In the Logan Area you can contact Toby Weed directly at 435-757-7578.

I will update this advisory on Monday, Wednesday, Friday, and Saturday mornings by around 7:30...

This advisory is produced by the U.S.D.A. Forest Service, which is solely responsible for its content. It describes only general avalanche conditions and local variations always exist.