Bulletin d’avalanche

Ogden

Émis le Feb 13, 2021valide jusqu’au Feb 14, 2021Utah Avalanche Center

Danger d’avalanche

Alpin
Limite forestière
Sous la limite forestière

Périmé — ce bulletin a expiré 6 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

The avalanche danger is CONSIDERABLE on all aspects at the mid and upper elevations. On aspects facing west through north through southeast, very large and dangerous avalanches breaking down 3-5'+ are possible at the mid and upper elevations. The avalanche danger is MODERATE at low elevations.

Travel Advice: avoid being on or beneath steep slopes. The low angle terrain is riding well.

Stay alert for rapidly-changing avalanche conditions as the avalanche danger may rise to HIGH today during any period of heavier precipitation.

Remember: IF you're stepping out of bounds, you're stepping into Considerable or High avalanche danger.

Problèmes avalancheux

Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Likely
Taille
4
You can trigger deep and destructive avalanches 3-5'+ deep and hundreds of feet wide. The most suspect terrain includes mid and upper elevation west to north to southeast facing slopes. These may not be the most widespread avalanche activity you'll see today, but these will be unsurvivable and will snap trees.

These type of avalanches are most pronounced in steep, thin rocky terrain.

Keep in mind:

Existing tracks on the slope offer zero signs of stability.

Avalanches can be triggered from a distance or below.

Any fresh wind slab or new snow avalanche may step down several feet into older snow.

Forecaster Note: Lower elevation shady aspects and higher elevation solar aspects also harbor varying degrees of weak snow and may be put to the test over the next several days. Uncertainty should lead to greater margins of safety.
Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Likely
Taille
2
Watch for increased sensitivity during any periods of heavy snowfall. During these times, natural soft slab avalanches will be possible and may even step into yesterday's storm snow, producing significantly larger avalanches. All aspects will be suspect and it may be possible to trigger these at a distance during high rates of snowfall. Yesterday's lingering wind drifts may still be sensitive to provocation at the mid and upper elevations.

Lastly, pay attention to cornices. Cornices are developing along many ridgelines and we have seen a few avalanches triggered from cornice falls. Be sure to give cornices a wide berth as they typically break much further back than expected and could trigger a much larger avalanche below.

Special Announcement

The final report about the Wilson Glade avalanche in Millcreek Canyon has been published. Our deepest condolences go out to the friends and families involved in this tragic accident.

NOTE: FEB 1-8th was one of the deadlier weeks on record with 15 backcountry fatalities in the US.

Dangerous avalanche conditions still exist.

Recent Activity

Ski area control teams and backcountry travelers found very sensitive avalanche conditions in the new snow yesterday. These were generally 12-18" deep and up to 150' wide on all aspects of the mid and upper elevations.

One backcountry skier was briefly caught and carried when an avalanche broke above him but was ok.

pc: B Brandt

Snow and Weather

Skies are obscured with light snow falling in the mountains.

Mountain temperatures are in the mid to upper 20s.

Winds aloft are 15-20mph and backing to the west-southwest ahead of the next approaching storm.

With a couple inches of new overnight, storm totals are 12-15" with upwards of 1.75" SWE.

Snowfall on a southwest flow should fill in this morning and continue with the trough axis moving overhead this afternoon. Winds will shift to the northwest and north with snowfall continuing overnight.

Watch for periods of heavy snowfall today. We may see upwards of 8-14" by early evening and a bit more overnight. A stronger storm accompanied by strong wind arrives Monday/Tuesday.

General Announcements

Please visit this website with information about Responsible Winter Recreation by the Utah Office of Outdoor Recreation.

CLICK HERE FOR MORE GENERAL INFO AND FAQ

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