Bollettino valanghe

Presidential Range

Mount Washington Avalanche Center
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Pericolo valanghe

Mon
Alta quota
1 · Debole
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 6 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

You could trigger an avalanche in wind-drifted snow on east-facing and south-facing aspects above 3000 feet. Watch out for areas of soft snow drifts that are deeper than your boot tops that look smooth and feel or sound hollow. Use your hand, a pole, or a shovel to evaluate this snow before committing to traveling in steep avalanche terrain.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    What and where is it:Wind slabs from drifting snow have likely formed in east-facing and south-facing terrain above 3000 ft. Increasing winds yesterday may have created a strong-over-weak snow structure that could easily slide on the hard, old snow below. How can you recognize it: Look for snow in steep terrain that looks smooth or pillowy and sounds or feels hollow. Probe with a ski pole to assess slab thickness and take a close look at the slab/underlying snow structure to understand the sensitivity. How can you manage it: Make consistent observations throughout the day to identify areas that could hold a dangerous wind slab and use these observations to inform your own decision making. Recognize that with such high wind speeds, the distribution of new wind slabs could be highly variable - don’t expect the snow under your feet to be representative of the snow higher or lower than you. Remember that people in the terrain above you present an additional hazard, especially if they trigger an avalanche higher up.

Avalanche Discussion

Increasing winds yesterday and last night may have had an opportunity to redistribute soft snow from northerly and westerly aspects and form slabs on easterly and southerly aspects. Expect the snowpack to be variable based on your elevation, aspect, and protection from the wind. On wind-protected slopes and around steep terrain features that provide wind protection, expect to find new wind slabs that could be sensitive to your weight. In wind-exposed areas, you may find significant wind-scouring down to the hard, textured, old snow surface. This harder snow is likely to be stable and could present a safer option for travel if you are concerned about the sensitivity of new wind slabs. 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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