Bollettino valanghe

Tetons

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 9 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Dangerous avalanche conditions exist. Over the last couple of days, several skiers and riders have had close calls at the mid and upper elevations. Miraculously, no fatalities or serious injuries have resulted. Numerous natural avalanches also occurred, some of which came down to the valley floor. Backcountry travelers are likely to trigger recently developed wind slabs up to three feet deep on steep, avalanche-prone slopes. Much higher consequence slides failing on the December drought layer could be initiated directly by backcountry travelers or indirectly after the release of the aforementioned wind slabs. These large to very large slides, which could also release naturally and be up to five feet in depth, are likely to be unsurvivable. During the day, warming temperatures and sunshine will increased the likelihood of both the recently developed wind slabs and the deep persistent slabs, particularly on sunlit aspects. Don’t let sunshine and fresh powder cloud your judgement; expert snowpack examination and a very conservative approach to terrain analysis will remain essential for safe travel in avalanche terrain. Below 7,500 feet, skiers and riders could trigger smaller slides. There, the runout zones of large, active slidepaths should also be avoided.

Problemi valanghivi

  • Deep Persistent Slabs

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

    Storm totals since January 9th are between two and three feet and contain over three inches of snow water equivalent. This extended loading event has reactivated weak, deep persistent layers of faceted snow that formed during the early December drought period. These avalanches could be triggered by the weight of a single person, or step down from the release of a smaller, recently formed wind slab. The consequences of being caught in one of these slides will likely be fatal. Increasing temperatures and sunshine will escalate the likelihood of these slabs as the day progresses.

  • Wind Slabs

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

    Copious snowfall and strong southerly to northwesterly ridgetop winds have formed wind slabs in leeward terrain. Skiers and riders are likely to trigger these slabs to depths up to three feet. Sunshine and warming temperatures will also increase the sensitivity of these slabs today.

Avalanche Discussion

A dry northwest flow will keep temperatures in the teens and 20s. Skies are expected to be mostly clear above areas of morning valley fog. Winds will be light at speeds of 10 to 20 miles per hour and will veer to the north.Conditions are dangerous. Very large slides continue to release naturally or are being remotely triggered by the weight of a person. A deeply buried persistent week layer of faceted snow will continue to produce large avalanches. Large human triggered avalanches are likely and natural avalanche activity is possible. These avalanches are killers. Theses conditions are prime for serious avalanche accidents. The general avalanche hazard is expected to be CONSIDERABLE. Make terrain choices that will ensure that you will live to ski or ride another day.

Regioni coperte