Bollettino valanghe

Ogden

Pubblicato il Dec 29, 2025valido fino al Dec 30, 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

There is a MODERATE avalanche danger on all aspects at the mid and upper elevations where you may trigger an avalanche involving recent storm or wind-blown snow that will run on a rain crust buried 4-12 inches deep. On steep mid and upper elevation northerly-facing slopes, it is possible to trigger a larger avalanche up to two feet deep failing on a persistent weak layer.

Fortunately, the weekend storm has left plenty of excellent riding options on lower-angled slopes on all aspects.

Problemi valanghivi

Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
2
The new snow may be less sensitive today, but human-triggered avalanches remain possible on all aspects, especially on upper elevation slopes that were wind-drifted. Sluffing on steep slopes is also possible.

Avalanches failing within recent storm or wind-drifted snow may run fast and far on the Christmas Rain Crust.

An avalanche running on the Christmas Rain Crust involving a rider being caught and carried.
Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Possible
Dimensione
2
There is a persistent weak layer (PWL) of weak, faceted snow and depth hoar down near the ground on northerly-facing aspects above about 9,000 feet. Sunday's avalanche on Sunset Peak failed on this PWL, control work from resorts also indicate avalanches failing on the PWL remain possible, and full propagation with extended column tests on this PWL continue.

Dealing with a PWL is already tricky business, and now the Christmas Rain Crust further complicates things as the crust may be strong enough on some slopes to support the recent load of new and wind-drifted snow, while other slopes may have a thinner crust where a rider may be able to affect the PWL and trigger an avalanche up to three feet deep and over a hundred feet wide. Ski cuts are notoriously ineffective tools at mitigating this problem as they often allow you to get well onto a slope before triggering an avalanche that propagates above you; existing tracks on a slope are also not an indication of stability (there are plenty of tracks adjacent to the Sunset Peak slide.)

On Friday, the UAC staff worked with the snow safety team at Powder Mountain, and in this video, Brooke Maushaund describes the situation of the snowpack ahead of the Saturday storm that left additional snow above the PWL.

Recent Activity

Derek DeBruin submitted an excellent observation from western side Ben Lomond from this past Saturday.

We received no reports of recent avalanches in the Ogden mountains, but to our south in the Salt Lake mountains, four human-triggered avalanches were reported to the UAC from Sunday, three involving the riders being caught and carried:

Toledo Bowl and Toledo Chute - Southeast aspect at 10,200 feet. Each were about 8 inches deep and ran a 1000 vertical feet.

Little Superior - Southeast aspect at 10,400 feet, 6 inches deep and 200 feet wide.

The avalanches mentioned above involved wind-drifted new snow running on the Christmas Rain Crust.

Sunset Peak - North aspect at 10,300 feet that ran on the persistent weak layer (PWL). This was 2.5 feet deep and 80 feet wide, with debris running to the apron below. Fortunately, the rider was not caught and carried, but they triggered another avalanche on a second piece of the slope as they avoid the initial avalanche. Photo below.

Human-triggered avalanche on Sunset Peak failing on the Persistent Weak Layer.

Snow and Weather

This Morning: Skies are clear and temperatures range from 10°-15° F. Winds are from the north/northwest and light, less than 10 mph with gusts up to 20 mph along exposed upper-level ridges and summits.

Today: Sunny with temperatures rising into the upper teens and low twenties °F. Winds will remain light, with occasional gusts around 20 mph.

The Saturday storm has settled to 4-8 inches of cold, dry snow on top of a stout rain crust that formed on Christmas Day. Slopes that are wind-loaded have up to 12 inches of snow above the crust.

Looking ahead, weather models are currently showing an active storm pattern beginning around the New Year.

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