Bulletin d’avalanche

Presidential Range

Mount Washington Avalanche Center
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Danger d’avalanche

Wed
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 3 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Avalanches are possible on steep slopes in drifts of deeper new snow, especially on east-facing aspects. Even a small avalanche can have deadly consequences if it causes a fall in steep terrain. Avoiding drifts of new snow that are greater than 3 inches can help you avoid the avalanche hazard today.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1

    Overnight, 2.3 inches of new snow fell on west winds, creating thin new wind slabs on east-facing slopes and in wind-protected terrain features. These slabs have formed on top of a slick, hard snow surface which may prevent a good bond from forming, increasing the sensitivity of triggering a wind slab today. 

    Dig down to the hard, old snow surface to assess new slab depth and sensitivity. If the snow becomes deeper and stiffer, your likelihood of triggering a wind slab avalanche is increasing. Slabs are likely to be small in size, but even a small avalanche can have severe consequences in steep, ski mountaineering terrain.

Avalanche Discussion

Even with low snow accumulation totals, effective wind loading speeds have increased the possibility of encountering a sensitive wind slab today. In many areas, you may encounter the hard, textured old snow surface instead of a new wind slab. There is still uncertainty about the size and distribution of new wind slabs. Because of this, continue to make slope-specific decisions based on your own assessments of wind slab presence. 

As temperatures warm, there is a chance for last night’s new snow to begin “shedding” off the mountain. This could mean roller balls coming off of rocky areas and small, loose wet avalanches later in the afternoon. This is not expected to be a significant hazard today, but is worth looking out for. 

 

The Lion Head Summer Trail is CLOSED due to increased avalanche hazard. The Lion Head Winter Route is OPEN and the most direct route to the Mount Washington Summit from Pinkham Notch. 

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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