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

Points saillants

Snow surface melt could allow for small areas of loose wet instabilities to form during the afternoon hours on wind protected slopes with direct sun exposure. Areas of very firm snow surfaces exist with a potential sliding fall hazard. LOW avalanche danger exists with normal caution advised.

Problèmes avalancheux

  • Cornices

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

    A decent snow surface refreeze is expected to have occurred last night with below freezing air temperatures at the mid and upper elevations. Some overnight cloud cover may have contributed to a weaker refreeze below about 7,000' to 7,500' where overnight air temperatures remained above freezing. Cloud cover is a bit of a wild card today and may reduce snow surface melt on E-SE-S-SW-W aspects. Increasing SW winds will also slow snow surface melt today on wind exposed slopes. Where cloud cover remains thin, wind protected slopes in direct sun will likely soften during the late morning to midday hours. Some small areas of loose wet instabilities could form this afternoon with wind protected slopes in direct sun exposure being the most suspect.

    There are lots of areas with firm snow surfaces out there and sliding falls remain a concern. Plan accordingly in terms of terrain, route selection, group ability, and equipment.

Avalanche Discussion

* Diurnal melt-freeze conditions continue on sun exposed E-SE-S-SW-W aspects.

* Highly variable snow surface conditions exist on NW-N-NE aspects. Mostly firm conditions exist near and above treeline. A mix of breakable crust and pockets of softer surface snow exist in NE wind protected areas below treeline.

* No reports of new loose wet avalanches have been received this week.

Régions couvertes