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
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 6 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Dangerous avalanche conditions, involving snow from the recent storm as well as deeper persistent weak layers, exist at all elevations with the larger slab depths and more dangerous conditions above 7,500 feet. Skiers and riders could trigger small to very large slab avalanches. At the tail-end of the most recent storm on January 5, many large slab avalanches occurred naturally. Cautious route-finding and conservative decision-making are essential for safe backcountry travel.

Problemi valanghivi

  • Wind Slabs

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

    Above 8,500 feet on wind loaded terrain features, wind slabs one to two feet in depth could be triggered by skiers and riders. Evidence of many large natural wind slabs at the upper elevations have been reported. These slabs formed over a variety of snow surfaces including crusts and facets. Careful evaluation of wind loaded areas in steep avalanche prone terrain is important to avoid a dangerous encounter with these surface slabs.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3

    The most recent storm that ended on the afternoon of January 5 added almost 2 inches of snow water equivalent to the snowpack. This additional load accompanied by moderate to strong winds resulted in natural avalanches on persistent weak layers with crown depths to five feet. At the lower elevations and in areas with a thin snowpack, these slabs will be more sensitive to being triggered, and slab depths will be one to two feet in depth.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )A transitory ridge of high pressure will exit the region tonight, and a weather disturbance will increase cloud cover with light snowfall expected by the morning. Accumulation amounts are expected to be one to three inches. Mountain temperatures will start in the mid-teens and then warm into the upper teens to twenties. Ridgetop winds at 10 to 20 miles per hour will veer to the west. Dangerous avalanche conditions, involving snow from a recent storm as well as deeper weak layers, exist across the forecast region. Skiers and riders could trigger small to large wind slab avalanches above 8,500 feet and persistent slab avalanches with slab depths three to five feet at the upper elevations. In the Teton and Grey’s River forecast areas, the avalanche hazard above 7,500 feet is expected to be Considerable, and on Togwotee Pass above 8,000 feet, the avalanche hazard is expected to be Moderate.

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