Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 13 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Avalanche danger is LOW for all elevations and aspects. Normal caution is advised.

Problemi valanghivi

  • Cornices

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

    Avalanche concerns for today are few. Recent observations have given several days worth of stable snowpack data. Small, isolated wind slabs in recently wind loaded areas above treeline and small loose wet avalanches during the late afternoon hours are the unlikely but not impossible avalanche problems today. Areas of complex or extreme terrain including unsupported slopes above cliff bands are the most likely locations for an isolated event to occur. Continue to exercise caution and utilize accepted best practice backcountry travel techniques to stack the odds in favor of survival against an unexpected human triggered avalanche.

Avalanche Discussion

Observations made yesterday on Castle Peak (Donner Summit area) revealed more evidence of stable wind slabs and minimal wet snow concerns. This matched well with other observations from around the forecast area over the past few days. While a relative weak layer of lower density snow remains prominent just below surface wind slabs, formal and informal tests indicate that propagation following a collapse of this relative weak layer is unlikely and that bonding to the layers both above and below remains strong.

Surface wet snow that forms in response to daytime heating remains limited to the top one to three inches of the snowpack in most areas on SE-S-SW aspects. In general, the snowpack on these aspects remains supportable into the mid to late afternoon hours. Isolated pockets of less supportable wet snow have been noted in areas where the snowpack is comparatively shallow.

Regioni coperte