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

LOW avalanche danger exists on all elevations and aspects. Continue to use normal caution and practice safe travel habits when traveling in the backcountry.

Problèmes avalancheux

  • Cornices

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

    A strong well bonded snowpack with a weaker snow near the surface and no slab above this weaker snow means that natural and human triggered avalanches remain unlikely today. Unlikely does not mean impossible and small isolated areas of unstable snow could linger on isolated terrain features especially in complex or extreme terrain like couliors, gullies, areas around cliffs, or unsupported slopes. Practice safe travel habits like traveling one at a time in avalanche terrain and regrouping in safe zones. Other backcountry hazards remain including icy conditions on some exposed near and above treeline slopes and a shallow snowpack with lots of obstacles.

Avalanche Discussion

Observations from Red Lake Peak, Becker Peak, Deep Creek, and Donner Summit yesterday continued to show variable conditions. The most consistent conditions existed on northerly aspects sheltered from the N-NE winds where several inches of soft unconsolidated snow exists above a deteriorating rain crust. On the sun exposed S-SW-W aspects on Red Lake, Becker, and on the south side of the Deep Creek Ridge, warm air temps combined with the sunshine to melt the snow surface leaving soft wet snow on the surface in some areas. Firm scoured crusts still existed on slopes exposed to the N-NE winds in all of these areas especially on near and above treeline N-NE-E aspects. Below the upper rain crust a thin weak layer that could become a future problem continues to form in all of these areas. Snowpit data indicates a strong and well bonded snowpack below that thin weak layer. Observations from Becker Peak and Deep Creek show a shallow snowpack below 7500 ft. with very little snowpack below 7000 ft.

Régions couvertes