Boletín de aludes

Elkhorns

Wallowa Avalanche Center
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Peligro de aludes

Sun
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Desactualizado: este boletín caducó 5 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

It is likely that you could trigger a fresh windslab along leeward ridgelines and cross loaded mid slope terrain features today.  The 2-4 feet of new snow that has fallen in the Elkhorns in the last several days is sitting upon a variable thickness crust that could be the perfect bed surface for natural and human triggered avalanches.  Mid and lower elevations will host storm slab avalanche potential today as the new snow settles into more of a cohesive slab. Stick to slopes with slope angles less than 30 degrees and if witnessing any of the 5 red flags of instability, dial back your terrain choices even further- or sample some of the best conditions Anthony Lakes Ski Area has had all year!  

Problemas de aludes

  • Wind Slabs

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

    There is plenty of new snow available for transport, and with moderate NW winds yesterday and overnight, sensitive windslabs may be easy to trigger today.    Look for clues of windloading such as smooth looking pillows, wind stripped ridgelines, and cross loaded terrain features.  Sensitive fresh cornice development is another clue that there is windloading often just below these cornices.  Avoidance is the best strategy with windslabs.  

  • Storm Slabs

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

    With time, temperature, and exposure to the sun, the new snow will settle into more of a cohesive slab.  Storm slabs are usually most easily triggered during and just after new snow storms.  Up to 4 feet of snow has blanketed the Elkhorns since Monday, and this has fallen on a crust that formed on Monday 2/22.  The snowpack needs time to adjust to this load.  Make conservative terrain choices today. 

Avalanche Discussion

Sensitive wind slabs will be likely triggered today.   The new snow will continue to settle into storm slabs,  and dry loose avalanches will also be possible today.  Although dry loose avalanches are sometimes not deep enough to bury a person, the consequences will be exaserbated by terrain traps such as gullies or cliffs.  Check out Victor's video from the middle of the week to get a better idea of the upper snowpack structure with the variable thickness 2/22 crust. 

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