Bulletin d’avalanche

Presidential Range

Mount Washington Avalanche Center
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Danger d’avalanche

Tue
Alpin
1 · Faible
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 7 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

You could trigger an avalanche in wind-drifted snow below 5000 feet in elevation on steep east-facing and south-facing slopes. Watch out for softer drifts of new snow that are sitting on top of an icy layer of old snow and are deeper than your boots. Travel on hard, wind-scoured snow to reduce your chances of triggering an avalanche.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1–1.5

    What and where is it:2 inches of new snow and increasing winds may have formed small wind slabs below 5000 feet on steep east-facing and south-facing slopes.How can you recognize it: Look for drifts of new snow that are deeper than the top of your boots, plumes of snow being blown by the wind at the ridgelines, and cracks in the snow around you. Dig down to the hard, old snow surface to understand the depth and density of new wind slabs and how easily the snow slides on top of the icy snowpack underneath. How can you manage it: Watch out for smooth, softer drifts of new snow on steep slopes and choose a travel plan that manages your exposure to these areas. Traveling on a firm, wind-scoured snow surface can help reduce the possibility of triggering an avalanche today.

Avalanche Discussion

There is some uncertainty about the size and distribution of new wind slabs in avalanche terrain today. Because of this uncertainty, your own field observations will be critical in making informed decisions and managing your own risk. In many areas, you may find a stable snowpack that lacks an avalanche problem. However, in lee terrain that has provided protection from the wind, it is possible to find deeper drifts of new snow that are sensitive to the weight of a person and could avalanche on hard layers of snow underneath. If you find a deeper drift of snow, look for signs of instability including a hard-over-soft snow structure, long shooting cracks underfoot, and a tendency to slide on an icy snow surface below. 

OBSERVATIONS: Please consider submitting an observation on our website or in the new Avy phone app of what you are seeing in your travels. Submitting an observation hones your skills, informs other users, and improves our forecasts.

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