Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
4 · Forte
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Non aggiornato — questo bollettino è scaduto 10 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Areas of HIGH avalanche danger will continue to exist today at all elevations. Localized convective snow showers are expected to create periods of high intensity snowfall. Widespread avalanche activity occurred yesterday and likely continued to occur last night. Wind slabs and storm slabs remain ongoing avalanche problems.

Travel in or below avalanche terrain is not recommended. Avoid avalanche runout zones.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    2

    Wind slabs remain an ongoing avalanche problem in many areas. The vast majority of wind slabs will be found near treeline and above treeline. Some wind slabs likely exist in below treeline areas due to the strength of the winds last night. The majority of wind slabs are expected to exist on NW-N-NE-E-SE-S aspects but could exist in isolated areas on SW-W aspects as well. Forecast wind speeds are fairly optimal for wind loading today.

    Travel in or below avalanche terrain is not advised. Avoid avalanche runout zones.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    2

    The mix of fluctuating snow level last night combined with high intensity snowfall is likely to have created storm slab instability within the recent new snow. Additional snowfall today and localized high intensity convective snow showers will allow for the continued development of storm slabs. Avalanche size could range from small to rather large depending on how much of the total storm snow is involved.

    Travel in or below avalanche terrain is not recommended. Avoid avalanche runout zones.

Avalanche Discussion

Observations made yesterday on Andesite Peak (Donner Summit area) noted natural and human triggered avalanche activity in near treeline and below treeline areas. Storm slabs and wind slabs failing around 1 foot deep near the base of the recent storm snow were seen on NE-E aspects. Information received from the West Shore Tahoe area reported widespread avalanche activity with numerous crowns, cracks, and debris piles well below treeline and on relatively lower angle slopes in the Jakes Peak/Hidden Peak area.

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