Bulletin d’avalanche

Central Sierra Nevada

Sierra Avalanche Center
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Danger d’avalanche

Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 10 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Increased cloud cover and winds combined with cooler daytime highs should keep the avalanche danger LOW for all elevations and aspects today. Some small loose wet snow instabilities may still form on isolated terrain features on slopes that receive rain today. Use normal caution in the backcountry. 

As a series of storms starts impacting the forecast area this afternoon and evening, the avalanche danger will increase quickly and avalanche problems like wind slabs and storm slabs will begin to form. 

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    0

    Avalanche activity should remain unlikely today. The cloudy skies, increased winds, slightly cooler temperatures, and the fact that the snowpack has been through a prolonged melt-freeze cycle should limit the formation of wet snow instabilities today, and the predicted snow and rain amounts should not be enough to form new avalanche problems. Some small isolated loose wet snow instabilities like roller balls, pinwheels, and the occasional point release may still form on isolated terrain features below 8500 ft. especially on slopes that receive rain. 

    Once the snow starts accumulating the avalanche danger will increase, and avalanche problems like wind slabs and storm storm slabs will become increasingly likely and widespread. Wind slabs will begin forming tonight and could easily become a problem by tomorrow if the high end of forecasted snow amounts occurs. 

Avalanche Discussion

Observations yesterday on Red Lake Peak (Carson Pass area) found stable, strong, well bonded snow on all aspects and did not reveal any signs of instability. The southerly aspects held melt-freeze conditions with 1-2 inches of soft corn snow resting above a solid and supportable melt-freeze crust above 8400 ft. The northerly aspects above 8400 ft. held a mix of firm, dry, cold snow and wind packed surfaces. This data agrees with most of the other data gathered this week around the forecast area and indicates that the current snowpack should handle new loading well. 

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