Boletín de aludes

West Slopes North

Northwest Avalanche Center
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Peligro de aludes

Tue
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
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

Stability is slowly improving but it is still possible that you can trigger an avalanche on large, steep slopes, especially as you make your way towards upper elevations. Avalanches could fail as deep as the new snow layer, 2-3+ft feet deep, and if you choose to enter steep terrain you're taking a gamble on whether you might trigger a large avalanche on that slope. 

Problemas de aludes

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–2.5

    Several natural and human-triggered avalanches occurred on Saturday, during and just after the storm that deposited 2-3+ft of snow in the West North zone. On Sunday, some folks were out testing steep slopes for us and didn't trigger avalanches. However, a few large human-triggered avalanches were reported. Check out the video accompanying this avalanche problem to see one of the avalanches a snowmobile triggered.

    We suspect a weak layer just beneath the new snow may be the culprit for some of the recent avalanche activity. It's tough to tell what slopes may harbor this layer, and information is limited. Consider avoiding large, steep and unsupported slopes, especially as you travel towards upper elevations. If you do choose to expose yourself to large slopes greater than 35°, stick to areas without terrain traps, such as benches, gullies, trees or rocks below, which would make getting caught in a slide even more dangerous. 

    Larger triggers, such as snowmobiles and cornice fall, may make it easier to trigger an avalanche. Wind-loaded slopes may be more reactive, but there's a possibility that in areas with thicker slabs it'll be more difficult to trigger underlying weaknesses. Shallower deposits may be where you could trigger a large slide. It's tough to tell! 

Avalanche Discussion

South-facing slopes saw sun on Sunday and a few small dribbles of moist and dry snow came down. A thin crust can be found on steep, south-facing slopes. A couple inches of snow is forecasted to fall on Monday. The new snowfall isn't expected to be enough to change the avalanche danger, but if we get more than forecasted, consider staying more conservative. A large storm approaches the region Monday night. We expect natural avalanche activity to result, and high avalanche danger for Tuesday. Danger may be reduced to moderate for one day, but that only means it possible rather than likely you'll trigger a large avalanche- you're not in the green. 

So far, we've received 2-3+ feet of snow since New Year's. We can expect to nearly double that in the next day. Nevertheless, our snowpack previous to our rapid arrival of winter was fairly thin, and mid and uppper elevations have a base of about 3 feet of firm, crusty layers where we aren't expecting avalanches to step down into. Continue to beware of sneaky creek holes and exposed or thinly snow-covered rocks, stumps and trees, reminding us that we still have a very thin snowpack despite this recent storm. 

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