Boletín de aludes

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Peligro de aludes

Sat
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Desactualizado: este boletín caducó 3 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Human triggered avalanches are likley at the middle and upper elevations where new snow and wind have conspired to build fresh slabs on top of buried weak layers and crusts. Areas of the forecast zone that are of particular concern include the Snake River Canyon and the Wyoming Range. Pay attention to signs of instability such as recent avalanche activity and cracking of wind drifted snow. 

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5

    Weak layers of snow that formed during the month of February are now buried around 2 feet deep. The most recent high pressure spell created crusts and facets that are now buried around 1 foot deep.

    Pay attention to signs of instability such as audible collapsing of the snowpack and recent avalache activity. You can use your shovel to dig a snowpit and perform a stability tests such as an extended column test to evaluate the presence and reactivity of buried weak layers. 

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2

    Fresh wind slabs that are 1-2 feet thick and soft will develop throughout the day in areas that are leeward of WSW winds. 

    Look for wind slabs on exposed terrain features such as ridgelines and open slopes near the head of drainage features. Pay attention to signs of instability such as cracking within wind drifted snow. 

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–1.5

    Soft storm slabs that are sensitive to human triggering will be around 1 foot thick and located throughout the terrain on all aspects at the middle and upper elevations. 

    Pay attention to signs of upside down snow and monitor the slope angles of the terrain you plan to ski or ride. If the new snow is upside down the trail breaking will feel especially difficult and your snowboarder friends will be having more fun than you.

    Dry loose avalanches could pose a threat or potentially trigger storm slabs if snowfall rates excede 1 inch per hour.

Avalanche Discussion

Recent avalanche activity has included a multitude of small storm and wind slabs over the past few days, as well as some medium sized persistent slab avalanches in the Snake River Canyon (observation here). 

Snowpack depths and characteristics vary immensely throughout the forecast zone. Shallower and weaker snow is to be found in the more continental ranges such as the Wyoming Range, while the Snake River Core (around Palisades and Powder Peaks) has a deeper snowpack more akin to the Tetons. The northern Salt River Range is also trending towards a deeper and more stable snowpack. Buried weak layers and crusts within the top meter of the snowpack are more prevalent in the Palisades Range and in the Snake River Canyon. 

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