Bulletin d’avalanche

Salt Lake

Émis le Feb 23, 2023valide jusqu’au Feb 24, 2023Utah Avalanche Center

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Danger d’avalanche

Alpin
Limite forestière
Sous la limite forestière

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Périmé — ce bulletin a expiré 4 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Areas of CONSIDERABLE avalanche danger exist across the compass. Human triggered avalanches are likely.

Know that you can also trigger soft slab avalanches in the low elevation bands today.

Careful snowpack evaluation, cautious route-finding and conservative decision making is essential.

Problèmes avalancheux

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Likely
Taille
2
Owing to yesterday afternoon's increasing northwest winds along the higher elevations and today's increasing southwest winds, you'll find soft slabs of wind drifted snow around the compass at the mid and upper elevations. These drifts will be 1-2' deep and sensitive to provocation. Early reports from cat drivers at the ski areas indicate strong winds and drifting snow this morning. Pay attention.
Storm Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Likely
Taille
2
Lingering new snow instabilities exist around the compass AT ALL ELEVATIONS. This is uncommon and I want you to keep the low elevation bands on your radar, even if you are just traveling through the low elevations.

Between the Ogden and SL mountains yesterday, three soft slab avalanches were triggered at a distance 1-2' deep and 100'-150' wide in these low elevation bands.

Know that you'll also be able to easily trigger loose long running sluffs in the new snow in the steeper terrain, particularly with the additional snowfall this afternoon.

Recent Activity

Avalanche conditions yesterday were described as "sensitive", "touchy", "widespread", and "long running and fast". Loose snow and soft slab avalanches within the new snow were soon accompanied by soft slabs of wind drifted snow by the afternoon. All of these soft slabs were generally 1-2' deep and up to 100' wide or so.

Of all the reported avalanches yesterday, the one that caught my eye was the remotely triggered slide in Parley's Canyon. A ski party triggered this soft slab from 50' away on an east facing slope at 7500'. The soft slab avalanche was 14" deep and 100' wide. This party, and other observers nearby, reported cracking and collapsing in the snowpack.

Check recent observations HERE>

Snow and Weather

We're living in a snow globe.

Light snowfall continues through the mountains of northern Utah.

Overnight, the Cottonwoods and PC areas picked up an additional 2-4". The Ogden and Provo mountains picked up 8-12", respectively.

Storm totals now are 26-30" (1.60"-2.0" Snow Water Equivalent) across the Central Wasatch, with 30"/2.60" in Ogden and 36"/3.26" SWE in Provo.

Mountain temperatures are in the low single digits and below zero at 11,000'.

Winds are now blowing from the southwest with hourly averages of 20-25mph with gusts to 40mph.

Showers will soon wind down before another system lines up to deliver another round of snow from the southwest this afternoon. We may see an additional 2-4" by early evening with storm totals of 4-8" by tomorrow morning. Mountain temperatures will be in the single digits and low teens. Winds will blow 20mph from the southwest, increasing to 30mph by the afternoon.

We'll get a bit of a break later Friday into Saturday before the next storm lines up for Sunday. The longer range models have storms until the end of time.

General Announcements

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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.

Observations and Avalanches

Backcountry Emergency Procedures