Bollettino valanghe

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Pericolo valanghe

Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 9 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Periods of moderate to strong winds have transported recent snowfall onto leeward slopes in wind exposed terrain above 8,000 feet. There, skiers and riders skiers and riders venturing into steep, avalanche-prone terrain could trigger small to large wind slabs. Avoid slopes that have obvious signs of wind loading. The likelihood of triggering these slides quickly decreases below 8,000 feet where less snow has fallen and the effect of the wind has been decreased.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    Over the past two days, moderate to strong westerly to northwesterly ridgetop winds have formed pockets of wind slab in leeward terrain above 8,000 feet. At the higher elevations, backcountry travelers could trigger these slabs to depth of 6 to 18 inches on steep, avalanche-prone slopes. The likelihood of triggering these slides will decrease with a drop in elevation where the snowpack has been less impacted by the wind. Crusts, areas of mildly facet snow and density breaks below the recent snowfall present other opportunities for slab failure. While failure on these layers is less likely, avalanches involving these deeper weaknesses could add an additional foot or two to slab depths. When evaluating the snowpack, determine the degree to which the recent snowfall is bonding to sun and rain crusts, and examine the potential for collapse on density breaks and faceted snow. Avalanche activity below the rain crust from early February is unlikely.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )Flow aloft will abruptly shift to the north overnight before backing to the west during the day on Sunday. This weather pattern will bring a cool, moist weather system out of western Canada that will bring overcast skies and light to moderate snowfall through the day. Overnight lows in the mountains will be near zero before rising into the low teens in the afternoon. Westerly ridetop winds will back to the southwest at 20 to 30 miles per hour.The general avalanche hazard is expected to be MODERATE on Sunday. New snow and moderate to strong winds will increase the depth and volume of recently formed wind slabs which rest upon sun crusts and areas of mildly faceted snow. Skiers and riders entering steep, avalanche-prone terrain could trigger these slabs to depths of six to eighteen inches. A slight chance remains for failures down to the early February rain crust, which could increase slab depths an additional foot or two.

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