Bollettino valanghe

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Pericolo valanghe

Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
1 · Debole
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In sintesi

The Winter Storm Warning issued by the National Weather Service remains in effect until 5 PM tonight. Abundant snowfall and strong ridgetop winds have formed large, dense wind slabs in leeward terrain. Above 7,500 feet, skiers and riders could easily trigger these slides, and natural activity is possible. The rapid loading event over the last 36 hours might be sufficient to reactivate deeper slabs failing on old snow surfaces from October. To mitigate these dangerous avalanche conditions, a conservative approach to terrain selection will be essential. The sparse snowpack is mostly stable below 7,500 feet where precipitation was mostly in the form of rain.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    2

    Up to 18 inches of new snow containing close to two inches of snow water equivalent has fallen since Wednesday night. This snowfall combined with strong southwesterly to westerly ridgetop winds to form dense wind slabs two to four feet deep in leeward terrain. These slabs developed on a variety of snow surfaces which include wind pack, near surface facets and sun crusts just below a couple of inches of recent snowfall. Skiers and riders are likely to trigger these dangerous slabs in steep, wind-loaded terrain above 7,500 feet. Natural avalanche activity is also possible.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )The National Weather Service has issued a Winter Storm Warning effective until 5 PM on Friday. A cold front will move through overnight and into Friday bringing periods of heavy snowfall. By Friday morning, an additional foot of new snow could accumulate in the mountains, and rain will turn to snow in the valleys. During the day, snowfall intensity will slowly decrease. Overnight lows in the mountains will be near 20 and only rise a couple of degrees during the day. Southwesterly ridgetop winds will veer to the west at 25 to 35 miles per hour.The general avalanche hazard is CONSIDERABLE and could increase to HIGH overnight depending on the amount of new snow and the impact of the wind. Abundant snowfall and strong ridgetop winds will continue to add depth and volume to newly developed wind slabs. Skiers and riders are likely to trigger these slabs ranging in depth from two to four feet in steep, wind-loaded avalanche terrain above 7,500 feet. This rapid loading event might be able to reactivate deeper slabs failing on old snow surfaces from October. This scenario would add an additional foot or two to slab depths. If the hazard does increase to high overnight, travel in avalanche terrain is not recommended.

Regioni coperte