Lawinenlagebericht

Presidential Range

Mount Washington Avalanche Center
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Lawinengefahr

Tue
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
Keine Stufe
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Kernpunkte

Avalanche conditions are dangerous. Human-triggered avalanches are likely and naturally-occuring avalanches are possible on north, east, and south-facing slopes above 3000 feet in elevation. Conservative decision making is critical for safe travel in the mountains today. Deep drifts of new snow, cracking underneath your feet, and blowing snow from the wind are all signs that conditions are dangerous in steep terrain.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2.5

    Expect to find large new wind slabs that could be easy to trigger from the weight of a person. You could find and trigger a new wind slab on steep slopes above 3000 feet in elevation that face north, east, or south. Consistent wind loading will continue to add volume and stress to new wind slabs which could allow for naturally-occurring, spontaneous avalanches today. These avalanches could be multiple feet thick, large enough to bury one or more people, and in some areas they could have enough destructive potential to destroy small trees. 

    Conservative decision making around avalanche terrain will be essential today as new wind slabs build and change. Conditions lower in elevation may not be representative of the conditions in higher elevation terrain, even within the same terrain feature. The most obvious signs of dangerous wind slabs will include deep wind drifts forming in wind-protected areas, long & shooting cracks underneath your feet, and snow being transported at the ridgelines (which may also cause poor visibility).

Avalanche Discussion

Yesterday, Mount Washington recorded 6.3 inches of new snow in addition to more than 5 inches of new snow from the 15th and 16th. Today, consistent winds at effective speeds for transporting snow, and an additional 2 - 4 inches of snow accumulation, will allow avalanche conditions to remain dangerous. Yesterday, MWAC received multiple reports of skiers triggering small avalanches and witnessing various signs of instability. This reactive sensitivity is expected to remain elevated today with the possibility for slabs to be larger and stiffer, which could greatly increase the consequence of being caught in an avalanche. 

It’s important to remember that conditions low down in avalanche terrain can give a false sense of stability when compared to conditions at higher elevations and closer to the ridgelines, where snow transport and wind slab development can be much more pronounced. Consider what kind of terrain is above you today, how slab formation might be different from your immediate location, and what the consequence would be in the case of a large avalanche. 

OBSERVATIONS: Please consider submitting an observation 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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