Boletín de aludes

East Slopes North

Northwest Avalanche Center
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Peligro de aludes

Sun
Alta montaña
1 · Débil
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Desactualizado: este boletín caducó 6 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

The danger is easing and avalanches are now difficult to trigger. If you're really hunting, you may be able to trigger an isolated and small wind slab avalanche near the highest elevation ridges. Steer around areas of recently drifted snow on slopes steeper than 35 degrees above treeline. 

Problemas de aludes

  • Wind Slabs

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

    It's now difficult to trigger wind slab avalanches. Expect more southwest wind Friday night into Saturday, but the wind may not have much snow to transport. Older drifts formed after a shot of snow Tuesday night and west to southwest winds through the week. Any fresh slabs will be small and immediately on the leeward sides of ridges and terrain features. You can avoid triggering avalanches by steering around these drifted features where you find stiffer snow. Watch for signs like cracks shooting through the snow as a warning to avoid these locations. On Thursday, an observed reported blowing snow above treeline on Silverstar Mtn, but little fresh slab formation. This photo shows similar conditions reported from observers on Kangaroo Peak on Friday.

    Winds stripped windward slopes near ridgetop over the past few days. Kangaroo Peak, 11/27. Photo: Craig Muderlak

Avalanche Discussion

Expect a dusting of an inch or two of new snow on Saturday with southwest wind. Washington Pass picked up about 6" of snow on Wednesday morning. Winds blew from the southwest since then and have stripped snow off of some windward slopes. The snowpack in the area is generally 3.5ft to 5ft deep. Over the past week, observers have identified a snowpack with a favorable hardness profile and good stability. However, one isolated deep avalanche was observed (see the photo in the media gallery). This slide occurred on a North aspect at about 7,000ft in Liberty Bowl. The crown was over 3ft deep, and it appeared to have run on weak snow above a melt-freeze crust near the ground. Our best guesses date it back to 11/18 or so. Although no other snowpack observations found weak snow near the ground, this is direct evidence that it is out there, and could be a problem in very isolated locations in the future. 

During the ongoing Covid-19 pandemic, continue to follow the latest guidance from local, state and federal health officials. Avoid unnecessary risks that could impact first responders and stress medical resources.  Wear a mask when appropriate, practice social distancing, and consider recreating closer to home.

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