Boletín de aludes

Olympics

Northwest Avalanche Center
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Peligro de aludes

Mon
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Desactualizado: este boletín caducó 4 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

NE winds will drift new snow through Sunday morning.  Be cautious in steep rocky chutes, below higher elevation ridgelines and anywhere where even a small avalanche could cause trouble.  Use general travel caution when dealing with low snow hazards and other slopes that may be firm or even icy. 

Problemas de aludes

  • Wind Slabs

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

    With nice sunny weather expected on Sunday, if you explore new and higher elevation terrain, you may encounter fresh and shallow wind slabs in specific places.  With NE winds expected through Sunday morning, this unusual wind direction will drift snow onto different aspects relative to our typical PNW storm track. 

    If you do trigger a wind slab avalanche on Sunday, it will likely be small and directly below ridgelines, in steep chutes, or below the base of cliffs.  Think in terms of the consequences of triggering a small slide.  A slab that breaks above a firm and smooth crust will travel quickly and could knock you off your feet.  Use extra caution in consequential terrain like a rocky couloir or above cliff bands where a small avalanche would have outsized consequences. 

    You may notice shallow instabilities like this on Sunday. Look for wind-stiffened snow, cracking,  or snow sliding easily to help you identify areas of concern. 

    Photo: Joe Dellaporta

Avalanche Discussion

NWAC pro-observer Sam siemens-luthy  was out at Hurricane Ridge/Maggies area on Saturday afternoon.  Challenging travel conditions due to a little bit of new snow over a variety of crusts will probably be what you're most concerned with on Sunday.   Sam found less than inch of new snow over a variety of crusts just as winds were beginning to increase mid-afternoon. On southerly aspects, the underlying crust is firm and very supportable.  On northerly aspects, there's a mix of recent snow and thinner crusts in the top 3" of the snow sitting atop of weaker snow.   This setup lead to some localized cracking on these aspects - something to watch when a more active storm track returns. 

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