Bulletin d’avalanche

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Danger d’avalanche

Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 6 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

The Winter Storm Warning issued by the National Weather Service for the northern portion of the forecast zones remains in effect until 6:00 PM this evening. Skiers and riders could trigger small to large pockets of wind slab in steep, wind loaded terrain above 7,500 feet. Daytime warming and periods of sunshine could increase the likelihood of triggering these slabs. Warming temperatures, valley rain or breaks in cloud cover could also result in small wet slides below 7,500 feet.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Most areas only received three to six inches of new snow in the past 24 hours. However, areas with locally higher amounts are likely, particularly in the Palisades and Southeast Idaho. Southerly to southwesterly ridgetop winds accompanied this snowfall, and pockets of wind slab formed. These slabs reside on a variety of snow surfaces which include crusts, wind pack and settled snow. In steep avalanche terrain, skiers and riders could trigger these slabs with depths ranging from 6 to 18 inches.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )The National Weather Serviced issued a Winter Storm Warning this morning for the Tetons, Togwotee Pass and the northern portion of the Southwest Trails forecast zone. This warning will continue through 6:00 PM on Sunday. The low pressure system off of the Pacific coast will continue to stream moisture into the region overnight and through most of the day on Sunday. The Tetons will once again be favored with this scenario, and an additional 6 to 12 inches could accumulate by tomorrow evening. The Southwest Trails and Togwotee Pass areas could see 3 to 6 inches in the same timeframe. Valley rain will also be possible in the afternoon. Overnight lows in the mountains will be in the low 20s before rising to near freezing during the day. Valley temperatures are expected to dip below freezing before rising to around 40 in the afternoon. Southerly to southwesterly ridgetop winds will range from 15 to 25 miles per hour.On Sunday, the general avalanche hazard is expected to be Considerable above 9,000 feet and Moderate below 9,000 feet in the Tetons. Skiers and riders could trigger newly developed wind slabs ranging in depth from one to three feet along with loose snow sloughs. In the Southwest Trails and Togwotee Pass forecast zones, Moderate hazard with similar concerns is expected in areas with more substantial snowfall. If significant valley rain occurs, wet slides involving the new snow will be possible, and these slides might involve older snow. Keep up your situational awareness; the hazard will be a function of the amount of new snow, and this could vary significantly within forecast zones.

Régions couvertes