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 12 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Avalanche danger is LOW for all elevation and aspects. Small isolated areas of loose wet instability will form today in response to daytime heating on slopes 37 degrees and steeper. These areas of instability are not expected to pose a significant hazard to backcountry travelers due to minimal size. Normal caution is advised.

Problèmes avalancheux

  • Cornices

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

    Clear skies overnight and near to below freezing air temperatures are expected to have allowed for a strong snow surface refreeze largely due to radiational cooling. Areas of wet snow will form today in response to daytime heating. The deepest wet snow will form on aspects that receive the greatest amount of solar radiation, generally SE-S-SW-W. The NW-N-NE-E aspects that remain somewhat transitional will also experience snow surface melting. Strong rain crust and older melt freeze-crust that extend below the top few inches of the snow surface are expected to keep significant instability from forming today on any aspect. Minor human triggered loose wet instabilities that occur today are expected to remain small and not pose a significant hazard to backcountry travelers without the involvement of cliffs and/or highly defined terrain traps.

Avalanche Discussion

Observations made yesterday on Rubicon Peak (West Shore Tahoe area) and in High Meadows (north of Freel Peak) revealed transitional snow surface conditions on NW-N-NE-E aspects and well established melt-freeze conditions on SE-S-SW-W aspects. Observed wet snow instabilities during the afternoon hours were minor and inconsequential. Rain crust and melt-freeze crust located a few inches below the snow surface kept conditions ski and boot supportable well into the afternoon hours.

Régions couvertes