Bulletin d’avalanche

Logan

Émis le Dec 13, 2025valide jusqu’au Dec 14, 2025Utah Avalanche Center

Danger d’avalanche

Alpin
Limite forestière
Sous la limite forestière

Périmé — ce bulletin a expiré 8 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

There is MODERATE avalanche danger today. You could trigger a dangerous avalanche on a persistent weak layer buried up to 2 feet deep on slopes steeper than 30 degrees. Upper-elevation, previously drifted terrain with poor snow structure is the most concerning, especially in the Northern Bear River Range.

Dangerous slab avalanches failing on a buried persistent weak layer might be triggered from a distance or from below.
Most slopes below 7000 feet are bare of snow or have only very shallow snow cover.

Problèmes avalancheux

Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Possible
Taille
2
Weak, faceted snow from November is buried under a heavy, dense slab of storm snow up to two feet deep. In areas where this sugary layer was present before last weekend’s storm, human-triggered avalanches remain possible and may propagate widely across a slope. While stability is slowly improving, avalanches could still be triggered remotely, from below, or from a distance.

Wind-loaded terrain near ridgelines, along sub-ridges and cliff bands, and in mid-slope features such as gullies is most suspect.

Even small avalanches can have serious consequences in shallow snow conditions, as you might be dragged through the rocks or downed trees below.

Follow safe travel protocols: travel with a partner, cross (or ride) steep slopes one person at a time while the rest of your party watches from a safe place.

Recent Activity

No new avalanches have been reported since last Sunday.

For all observations and avalanche activity in the Logan Zone, go HERE

Snow and Weather

It is currently 30°F at the 8700' Card Canyon weather station with just over 15 inches of total snow. The Tony Grove Snotel at 8400' reports 24 inches of total snow, while it's a balmy 35°F. On Logan Peak, winds are blowing from the west at around 35 mph with gusts in the mid-40s mph, and it is 32°F. Usually, we'd be concerned about drifting at these speeds, but the recent un-December-like warmth has melted any dry snow.

Our snowpack has taken a significant hit from recent—and ongoing—warm temperatures. A widespread melt-freeze crust now caps dense, slabby snow, with a weak, faceted layer near the ground. While obvious red flags like cracking and whumpfing are less “in your face” than last weekend, snow stability tests continue to show the potential for slab avalanches to propagate, highlighting our ongoing persistent weak layer problem. Conditions remain generally rough, with thin snow cover and exposed hazards making travel challenging. We’ve had worse mid-December conditions, but not by much. See the photo below for current snow surface conditions. (PC: Flygare)

Tuesday's snow stability tests in the Northern Bear River Range near Copenhagen Basin showed potential for avalanches to propagate, and continued instability in some areas...Below is a video of snow stability tests from the Emigration Creek area on December 9.

It'll be another beautiful, sunny day in the mountains today, with highs in the mid-to-upper 30s°F and light to moderate winds blowing from the west. Tomorrow will be even warmer. This pattern continues through about mid-week when our chance of precipitation increases. Fingers crossed for a snowy holiday.

Additional Info

For more information, visit the UAC weather page here: UAC Weather Page For Logan-specific weather, go here: Logan Mountain Weather

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This forecast is from the U.S.D.A. Forest Service, which is solely responsible for its content. This forecast describes general avalanche conditions and local variations always occur.

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This information does not apply to developed ski areas or highways where avalanche control is normally done. This forecast is from the U.S.D.A. Forest Service, which is solely responsible for its content. This forecast describes general avalanche conditions and local variations always occur.

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