Bollettino valanghe

Presidential Range

Mount Washington Avalanche Center
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Pericolo valanghe

Thu
Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 4 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Wind blown slabs of snow exist in steep terrain with the potential to cause small human-triggered avalanches. These pockets of unstable snow may appear smooth and can be found on the eastern facing slopes below ridgelines and in between rocks and ice bulges. Being involved in a small avalanche today will likely result in traumatic injuries sustained after hitting the exposed hazards of a thin and inconsistent snowpack.

Problemi valanghivi

  • Wind Slabs

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

    Slabs of wind drifted snow are scattered amongst rocks, ice, and vegetation with irregular fashion on the steep slopes of the mid and upper elevations. North and west winds have sculpted and redistributed the snow from last week onto slopes facing south and east in much of the range. Many of these slabs will appear smooth and rounded, with a brittle quality and a hollow sound as you approach them. If you can penetrate above your boot-tops or you see cracks radiate from your footsteps while climbing in steep terrain, you should likely readjust your trajectory and reevaluate because you may have found a problematic wind-blown slab.

Avalanche Discussion

Smaller and more isolated pockets of wind blown snow still reside on steep slopes creating a potential for avalanches. Much of the upper elevation ski terrain is still quite segmented in regards to the distribution of snowpack and availability of larger avalanche starting zones. Avalanches seen today will likely be small in size but carry the risk of taking an individual downslope over exposed rocks, ice, and vegetation.

Over time the winds have stripped areas of snow and redeposited them to more leeward facing slopes on the eastern side of the mountains. Elsewhere, slower settlement of the snowpack has allowed much of the concern for large avalanches to decrease. Still careful route selection and avoidance of many of the objective hazards of climbing on thinly snow-covered mountains exist. A fall in steep terrain today will be unforgiving, prepare for self arrest and be aware of your surroundings.

Thanks to everyone for taking the time to submit observations of snow and avalanche conditions. If you are out today, and the skies clear to allow better visibility please take a few minutes at the end of the day to add an observation at our website. Your observations help us produce a more accurate forecast, and helps the community make better decisions in avalanche terrain by having more information. 

The Lion Head Summer Trail is now closed for the season due to avalanche risk. The Lion Head Winter Route is open.

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