Bollettino valanghe

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Pericolo valanghe

Thu
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 3 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Human triggered avalanches will be possible today, especially in the alpine where new snow and wind have conspired to create fresh wind slabs. Temperatures should remain cool today, but if the sun pokes through at any point the snow surface will begin to heat up quickly. Fresh wind slabs should mostly be confined to start zones and exposed ridgelines in the lee of southwest winds. Pay attention to signs of instability such as cracking within wind drifted snow, and minimize exposure time on steep sunlit slopes if the skies decide to part. 

Problemi valanghivi

  • Wind Slabs

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

    Wind Slabs: Fresh wind slabs that are around a foot thick will be located near treeline and in alpine terrain. These slabs will mostly be soft and sensitive to human triggering, but in most instances they should propagate too far. Slabs will mostly be confined to avalanche start zones and ridgelines. Pay attention to signs of instability such as cracking within wind drifted snow. 

    Storm Slabs: Very shallow storm slabs could overlie a variety of crusted surfaces on southerly aspects, mainly near treeline and below. 

    Dry Loose: Dry loose avalanches could pose a threat in steep terrain. 

    A photo from earlier this season highlighting possible wind slabs and poor bonding on the interface.

Avalanche Discussion

The Tetons and Greys River zones have picked up 3-6 inches of snow in the last 24 hrs at the middle and upper elevations. Winds have averaged out of the SW in the 15-25 mph range on the peaks. For the most part it seems like the snowfall was mostly rightside up, starting off warm and ending cold. Currently temperatures are in the single digits on the peaks and near 20 degrees in the valleys. The forecast for today is for lingering snow showers with some possible broken skies in the valleys this afternoon. The mountains could pick up another inch or so on average, but if you look at the webcams it seems to be dumping up at Grand Targhee under a cool NW flow. 

With 523 total miles of wind recorded at Rendezvous Summit and 3-6 inches of 10% snow (trending towards 7% currently), wind slabs, dry loose, and possibly the odd shallow storm slab could all be in play today. Temperatures might reach around 20 degrees on the peaks and near freezing in the valleys, so unless the sun comes out snow surfaces should remain cold and dry. If the sun does come out expect plenty of rolly ball action and maybe even some small moist loose activty on southern aspects. 

Regioni coperte