Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Open full map
Non aggiornato — questo bollettino è scaduto 13 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Near and above treeline pockets of MODERATE avalanche danger still exist on wind loaded slopes 35 degrees and steeper on NW-N-NE-E-SE aspects due to lingering wind slabs. In wind protected areas below treeline and in wind scoured areas near and above treeline, avalanche danger remains LOW.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2

    Most of the wind slabs that still exist on on the leeward NW-N-NE-E-SE aspects remain relatively small and difficult to trigger. However, some wind slabs 1-2 ft in depth still linger in the most heavily wind loaded areas that received the most snow on Saturday night. Complex and/or extreme terrain including "cliffy" areas, unsupported slopes, couliors, etc represent the most likely places to find these pockets of larger more fragile wind slabs where human triggered wind slab avalanches will remain possible today.

Avalanche Discussion

Strong winds continued to move snow from the windward aspects to the leeward aspects near the ridgelines in the Mt. Rose and Carson Pass areas yesterday. Wind slabs up to 16 inches deep existed on leeward aspects in both of those areas. On Red Lake Peak observations and snowpit data collected near the avalanche that occurred on 2/16 showed that the wind slabs in that steep and complex wind loaded terrain remain fragile and susceptible to human triggering. On Incline Lake Peak and on Tamarack Peak data indicated that the wind slabs remain more difficult to trigger. On Tamarack Peak ski cuts on unsupported/undercut test slopes that held those wind slabs did cause them to fail. On similar supported/non-undercut test slopes ski cuts did not cause any cracks or failures.

Regioni coperte