Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 9 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Low avalanche danger continues throughout the forecast area at all elevations.  Isolated hard wind slabs in near treeline and above treeline terrain represent an unlikely, but not impossible avalanche problem.  Look for unstable snow on isolated terrain features.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1

    Isolated hard wind slabs could exist on NW-N-NE aspects in near treeline and above treeline terrain.  Last weeks NE/E wind event has scoured most slopes near treeline and above and has created very dense and strong hard wind slabs.  Where these hard wind slabs sit on top of old near surface facets, snowpack tests have shown weakness with this combination. This avalanche problem has become unlikely to occur, but concern still exists on unsupported slopes and steep complex terrain.  

    Any avalanche involving this problem could have large consequences with our low snowpack conditions.  Look for slopes with smooth, wind sculpted surfaces, and avoid areas with any type of hollow sounding snow.  

Avalanche Discussion

-Snow coverage is deepest above 8000' in the northern part of the forecast region (areas above Emerald Bay).  Minimal snow coverage exists below 8000'.  In the southern part of the forecast area, snow coverage is deepest above 8500' with varying amounts of usable snow.  Snow coverage is decreasing on southerly aspects at higher elevations. 

-Hard wind slabs with underlying loose faceted snow observed on Needle Peak Ridge (Granite Chief Wilderness), Elephants Back (Carson Pass area) and Relay Peak (Mt. Rose area) during the last week.

-Widespread firm, wind scoured snow surfaces found on most near and above treeline terrain.

Regioni coperte