Bollettino valanghe

Logan

Pubblicato il Jan 3, 2026valido fino al Jan 4, 2026Utah 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

MODERATE: Heightened avalanche conditions exist on upper and mid-elevation slopes, where people could trigger slab avalanches of stiff, wind-drifted snow on slopes steeper than 30 degrees. There are also likely isolated slopes where dangerous hard slab avalanches failing on a buried persistent weak layer near the ground are possible.

Evaluate snow and terrain carefully, especially in high, drifted terrain.
A winter storm with heavy snowfall and drifting snow will elevate the avalanche danger tonight and tomorrow.

Problemi valanghivi

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
2
People could trigger wind slab avalanches today, especially in exposed terrain at upper elevations and probably also on some drifted mid-elevation slopes facing the northern half of the compass. Wind slab avalanches could fail on a preexisting layer of weak surface snow. A potential persistent weak layer consisting of glittery surface hoar and small sugary grains of faceted snow exists on last year's snow surface. Buried by the New Year's storm, it could have been preserved intact on some slopes. Wind slab avalanches 1 to 2 feet thick might fail on this layer where it exists today.

Avoid steep slopes with thick and/or stiff deposits of recently wind-drifted snow.

Wind slabs often are smooth and chalky looking, and they can sound hollow, like a drum.

Cracking is an obvious sign of instability.

Hard wind slabs can be devious, sometimes allowing people to get well out on them before releasing suddenly, like a mouse trap.
Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Unlikely
Dimensione
3
A buried persistent weak layer problem likely still exists in outlying upper-elevation terrain, but this is unconfirmed since many popular slopes remain unvisited. In the southern half of the zone, including the Logan Peak Area and the Wellsville Range, much upper-elevation avalanche terrain remains difficult to access, and few people are venturing there. We are still concerned by poor snowpack structure, with a weak layer of November facets near the ground. In many areas, especially at mid elevations, those grains are now moist or wet due to all the rain, and overall, they’re showing less signs of instability. Until proven otherwise, dangerous, hard slab avalanches up to 3 feet deep remain possible in isolated or outlying drifted terrain.

Recent Activity

No new avalanches have been reported in the Logan Zone since early December. For all observations and avalanche activity in the Logan Zone, go HERE.

Snow and Weather

It was wet in the backcountry, even up high yesterday, with light to moderate rain below about 8000 feet and rime or freezing rain above. A riming event occurs when water droplets freeze and coalesce on objects, like trees, brush, and weather stations. Rime grows in the direction the wind is blowing.

In fact, our Paris Peak wind sensor was rimed and stopped reading wind speeds, pointing to the north at 10:00 yesterday. Currently on the coms tower on Logan Peak, the wind is blowing 24 mph from the south with gusts pushing 50 mph, and it's 26°F. It's 30°F at the Tony Grove Snotel this morning with 46 inches of total snow and about 11 inches of heavy, rimed new snow from the New Year's Storm, containing 2.1 inches of SWE (snow water equivalent). At the UAC Card Canyon weather station, it's 29°F with around 7 inches of new snow and 32 inches of total snow.

We are heading into a rather stormy period, with lots of snow in the forecast for the weekend. The National Weather Service has issued a Winter Weather Advisory for the Logan Zone starting tonight and extending through late Monday night. Snow will start falling in the mountains tonight, with temperatures at 8500 feet dropping to around 29°F, and 3 to 7 inches of accumulation possible. Upper elevation terrain could see 2 feet of new snow by Monday morning!

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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