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

Points saillants

LOW avalanche danger will exist at all elevations today. Daytime warming may allow some small loose wet avalanche problems to form on some isolated sun-exposed terrain features where snow coverage exists.

Problèmes avalancheux

  • Loose Wet

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

    Some thin high clouds and increased winds may slow down today's melting, but warm temperatures and sunshine should still allow wet snow to form on sun-exposed E-SE-S-SW-W aspects. Since limited snow cover exists on the SE-S-SW-W aspects and the snowpack has already been through several melt-freeze cycles, this wet snow should remain shallow keeping wet snow instabilities small and isolated as well. Small roller balls, pinwheels, or loose wet avalanches that do not entrain enough snow to bury a person (D1 in size) may form on some isolated terrain features. Steep E-SE aspects where more snow exists and/or where the recent snow has not fully transitioned to melt-freeze snow represent the best places to trigger a small, isolated loose wet avalanche.

Avalanche Discussion

* Spring-like corn snow formed on SE-S-SW aspects where snow cover existed in the Bear Valley backcountry yesterday by 10 am. Ski cuts on S facing test slopes on Incline Lake Peak triggered small roller balls and pinwheels at that time as well.

* Little to no snow cover existed on the sun-exposed SE-S-SW aspects below 8500 ft. in the Bear Valley backcountry and on Incline Lake Peak.  

* Snowpit data and observations on northerly aspects in the Bear Valley backcountry and on Incline Lake Peak showed a well-consolidated snowpack with cold unconsolidated surface snow on some open true N facing slopes. Wet sticky snow/breakable crusts existed on tree covered slopes or on more sun-exposed NW and ENE aspects in the Bear Valley backcountry. Below 7800 ft. coverage on north aspects decreased in the Bear Valley backcountry.

Régions couvertes