Bollettino valanghe

Logan

Pubblicato il Dec 27, 2025valido fino al Dec 28, 2025Utah Avalanche Center

Pericolo valanghe

Alta quota
Limite del bosco
Sotto il limite del bosco

Non aggiornato — questo bollettino è scaduto 8 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

CONSIDERABLE: Dangerous avalanche conditions exist on drifted upper elevation slopes steeper than 30 degrees facing northwest through southeast. Periods of heavy snowfall and drifting will continue to elevate the danger today.

Slopes below about 7000 feet in elevation across the zone were bare of snow or had only minimal snow cover before yesterday's storm.

Problemi valanghivi

Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Likely
Dimensione
2
The danger of soft slab avalanches of storm snow will continue to rise today as new snow piles up and is drifted onto steep slopes. Natural avalanches are possible, especially during periods of particularly heavy snowfall. Wind slab avalanches will also become more likely, especially in upper elevation terrain, where winds from the west will drift the falling snow and the snow that's already on the ground.

Even small avalanches can have serious consequences in shallow snow conditions, where a slide could drag you through rocks or downed trees below.
Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
3
Dangerous, hard slab avalanches up to 2 feet deep are possible on steep slopes in drifted upper elevation terrain. Recently drifted slopes with poor snow structure (a slab of dense snow on top of weak faceted snow near the ground) are most suspect. At upper elevations, weak, faceted snow from November is buried beneath a thick crust or multiple crusts and dense snow. People could trigger dangerous hard slab avalanches up to 3 feet deep that propagate widely.

Collapsing, indicated by shooting cracks and/or whumpfs, is a warning sign of unstable snow.

Avalanches might be triggered remotely (from a distance or below).

See Bear Wallow ECTP_6 video below

Recent Activity

No new avalanches have been reported locally since early December. A party reported a loud whumpf or audible collapse in upper elevation northeast-facing terrain yesterday. (see report) For all observations and avalanche activity in the Logan Zone, go HERE

We triggered a couple of small collapses yesterday near the top of Beaver Mountain, indicated by shooting cracks.

Snow and Weather

Natural avalanches are possible in drifted upper elevation terrain. People could trigger dangerous avalanches failing on a persistent weak layer buried near the ground, up to 3 feet deep, and soft slab avalanches of drifted storm snow are likely. Heightened avalanche conditions are found in most other terrain. We expect heightened avalanche conditions to continue to develop, particularly in drifted terrain, where people are likely to trigger soft slab avalanches of storm snow.

Periods of heavy snowfall are expected in the Bear River Range today, and strong winds from the west will continue to drift the new snow onto favored lee slopes. Temperatures continued to drop overnight, and webcams show moderate snowfall at Beaver Mountain's base and at UDOT's Logan Summit shed this morning. It's 25°F at the Tony Grove Snotel, with about 16 inches of new snow from the storm so far, and there's 42 inches of total snow at the site. The UAC Card Canyon weather station is showing a cool 21°F and around 15 inches of new snow, with 28 inches of total snow. On Logan Peak, it's 19°F, winds are from the west at 20 mph, with a gust of 44 mph early this morning. On Paris Peak, it's 18°F, and the wind is blowing from the southwest at 15 to 21 mph.

The National Weather Service has continued a Winter Weather Advisory for the Logan Zone through tonight. Expect periods of heavy snow in the mountains today, with 3 to 7 inches of additional accumulation possible by this evening in upper elevation terrain. Temperatures at 8500 feet will drop to around 16°F, and winds will blow from the west 20 to 25 mph, with gusts around 40 mph. Snowfall will taper off tonight, with temperatures around 5°F. Breezy conditions are expected, with wind from the west-northwest west 20 to 35 mph, decreasing gradually through the night. Tomorrow will be sunny, with a high near 17°F, with winds blowing from the west around 7 mph, and wind chill values as low as -7°F.

Additional Info

Use safe travel practices: travel with a partner, and cross or ride steep slopes one at a time while the rest of your group watches from a safe spot.

Are you interested in learning more about avalanches? Visit our education page for details on all our classes.

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

-For all questions on forecasts, education, Know Before You Go, events, online purchases, or fundraising, call 801-365-5522.

-Remember, the information you provide could save lives, especially if you see or trigger an avalanche. To report an avalanche or submit an observation from the backcountry, go HERE

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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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