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

Points saillants

The avalanche danger remains LOW at all elevations and on all aspects. Continue to use normal caution when traveling in the backcountry.

Problèmes avalancheux

  • Cornices

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

    Human triggered avalanches remain unlikely. Unlikely does not mean impossible and some unstable snow could still lurk on isolated terrain features. Complex or extreme terrain like unsupported slopes above cliff bands, couliors, etc represent the places where unstable snow could linger in the form of small wind slabs. On the most sun-exposed SE-S-SW aspects a few small isolated wet snow instabilities could also from today. Continue to exercise caution and use best-practice backcountry travel techniques like avoiding terrain traps that magnifiy the consequences of small avalanches.

Avalanche Discussion

Yesterday on Red Lake Peak, a variety of wind packed, wind affected, and wind scoured snow surfaces existed on near and above treeline E-NE-N aspects. In some places hard wind slabs up to 18 inches thick still remained on the N-NE aspects. Softer snow existed on the more sheltered northerly aspects. Snowpit tests, ski cuts on wind loaded test slopes, hand pits, and general observations did not reveal signs of instability in these areas.

On the more sun-exposed SE-S-SW aspects of Red Lake Peak, 1-2 inches of soft melt-freeze snow (aka "corn") had formed on the surface up to 9800 ft. by 1-2 pm. Below this shallow layer of soft wet snow frozen and supportable melt-freeze snow existed. Ski cuts on steep sun-exposed test slopes did not trigger any wet snow instabilities.

Régions couvertes