Bollettino valanghe

Salt Lake

Pubblicato il Dec 24, 2025valido fino al Dec 25, 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

Avalanche danger is MODERATE on wind-drifted slopes above 9000 feet, where you could trigger a 1 to 2 foot deep slab avalanche on a buried persistent weak layer. Recent signs of unstable snow were observed along the Millcreek and Park City ridges, making those areas some of the most suspect zones today.

Avalanche danger is LOW elsewhere. Watch for unstable snow on isolated terrain features, where warm temperatures and rain on snow can produce small, wet, loose avalanches in steep terrain.

Problemi valanghivi

Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
2
Recent activity along the Park City ridgeline highlights the tricky variability of this problem. Yesterday, the UAC and Canyons Village snow safety team investigated a remotely-triggered avalanche on Murdock Peak from Sunday (12/21). The image below details the structure: a thin slab sitting on top of dry facets and depth hoar.

While reported avalanches over the last two weeks have been relatively sparse and generally small (12-18" deep, <80' wide), the signs of instability are notable. The recent remote trigger, combined with reports of collapsing and unstable test results, proves this weak layer remains reactive in areas where the snowpack is thinner (roughly 12-18 inches of total snow depth).

I am uneasy about the continued warm temperatures and how the slab and weak layer combination may react. This is not your typical dry, December snowpack, and although this warmth may lead to strengthening of our snowpack down the road, for now, there is enough uncertainty and signs of unstable snow that it's worth building in margin and being skeptical.
Loose Wet
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Unlikely
Dimensione
1
Unseasonably warm temperatures and rain falling on snow may create loose wet avalanches. While these slides may be small, the heavy, wet debris can be dangerous in tight spots. Avoid terrain traps like road banks, creek beds, and gully walls where this heavy snow can pile up deeply and bury a person.

Recent Activity

On Sunday, 12/21 a snowboarder near Murdock Peak remotely-triggered a soft slab avalanche that broke 12 to 18 inches deep, 50 feet wide, failing on the Persistent Weak Layer near the ground.

Read all recent observations HERE.

Snow and Weather

Overnight, temperatures remained warm, dropping only into the upper 30s °F at most locations above 8000 feet. The wind blew from the south & southeast at 15-30 mph, with gusts hitting 40 to 60 mph. No new snow was reported.

Today, temperatures will climb into the 40s °F as wind out of the south and southwest increases, gusting into the 50s. Light precipitation begins this afternoon with a very high rain/snow line (around 10,000 feet). Heavier precipitation is expected to move in overnight, potentially delivering 2 to 4 inches of heavy, dense snow by tomorrow morning.

Don't let low snowfall totals fool you; this storm is wet. We expect 0.5 to 1.0 inches of Snow Water Equivalent (SWE). This adds significant weight to the snowpack and will increase the sensitivity of avalanche problems, even if it doesn’t look like a major storm.

Looking ahead (and not wanting to jinx it), another storm is lined up for Friday into Saturday that looks like a more classical, cold Utah storm.

Statwide Snow Water Equivalent is 53% of the median and in the 0-percentile, meaning we are at or near historic lows for this date. It's low tide, but coverage is improving, and things can change quickly.

General Announcements

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.

Observations and Avalanches

Backcountry Emergency Procedures