Bulletin d’avalanche

Central Sierra Nevada

Sierra Avalanche Center
Voir sur la carte

Danger d’avalanche

Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible
Open full map
Périmé — ce bulletin a expiré 12 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

The avalanche danger remains LOW on all elevations and aspects. Some wet loose instabilities may become possible if any rain continues to fall on the snowpack today especially in areas north of I80 where the best chances for rain exist. Any wet snow instabilities that do form should remain small and isolated. Continue to practice safe travel habits and thoughtful decision making when traveling in the backcountry.

Problèmes avalancheux

  • Loose Wet

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

    Cloud cover, overnight temperatures above freezing, and continued light rain showers in some areas last night should have prevented a decent refreeze from occurring. This lack of refreeze combined with continued warm temperatures today and the slight possibility of continued light rain showers will mean that some small isolated wet loose snow instabilities may be possible today on any aspect or elevation where rain continues to fall. The last few weeks of melt-freeze cycles have created drainage channels in the snowpack that allow water to quickly drain out of the snowpack. This ability for the snowpack to deal with free water should help limit any wet snow instabilities that might form today to pinwheels, roller balls and small wet loose snow sluffs. If any wet snow instabilities do occur they will most likely happen in areas north of I80 that have received the most rain and where light rain remains possible today. In areas that have not received rain and do not receive rain today wet snow instabilities should remain unlikely.

Avalanche Discussion

Yesterday light rain created a thin soft layer of wet snow on all aspects and elevations up to at least 7800 ft. on Lincoln Ridge near Yuba Pass. This wet snow rested on top of a supportable snowpack in this area, and small (less than 12 inches in diameter) skier-triggered pinwheels represented the only observed wet snow instabilities. Snowpit data and tests targeting the weak layer near the buried rain crust indicated that this layer has gained some strength.

Régions couvertes