Bulletin d’avalanche

Central Sierra Nevada

Sierra Avalanche Center
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Danger d’avalanche

Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Périmé — ce bulletin a expiré 7 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

LOW avalanche danger will exist at all elevations while the snow surface remains frozen this morning. The avalanche danger will quickly increase to MODERATE and loose wet avalanches will become possible as the day warms up. 

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1

    Last night's clear skies should have allowed enough heat to escape from the snowpack for a thin refreeze even though temperatures remained above freezing. Today's strong sun and warm daytime temperatures will quickly melt thought this refreeze. Loose wet avalanches will become possible as the crust melts. Some of these could entrain enough snow to have consequences for backcountry travelers, especially on long steep sunny slopes where more recent snow exists. 

    Conditions will switch from supportable and frozen to loose and wet in a short amount of time. Once the snow surface starts to become unsupportable it is time to either get off the snow or focus on low angle slopes. Today is one of those great days for recreating on snow in the morning then switching activities entirely in the afternoon.

Avalanche Discussion

* Yesterday on Stevens Peak ankle deep wet snow existed on sun-exposed aspects at all elevations by 11:30 am. Ski cuts triggered roller balls and at least one D1 loose wet avalanche around noon.

* Widespread loose wet avalanche activity has occurred since the new snowfall on Monday night. 

Régions couvertes