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 exists for all elevations until new snow starts to accumulate this afternoon/evening. Some areas of instability can still exist on isolated terrain features during LOW danger.

Once it begins snowing, the avalanche danger will increase rapidly as WIND SLABS and STORM SLABS form. During the night natural avalanches will become possible and the avalanche danger will rise to CONSIDERABLE. Expect dangerous avalanche conditions in the backcountry tonight and tomorrow. Check back tomorrow morning for the latest updates. 

Problemi valanghivi

  • Cornices

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

    While avalanche activity will remain unlikely during the day today, some unstable snow may still linger on isolated terrain features especially in complex or extreme terrain like couliors, steep convex rollovers, or unsupported snow slopes.

    As new snow starts to fall this afternoon, WIND SLABS and STORM SLABS will start to build on top of the snowpack. These will increase in size quickly during the night due to intense snowfall rates and strong winds. They will form faster than they can bond to the old snow. Some weaknesses will likely form within the storm snow as well. Human triggered wind slab and storm slab avalanches will become likely tonight and some natural avalanches will be possible. If the storm arrives sooner than expected, these avalanche problems will also form sooner. If for some reason backcountry travel is required tonight, dangerous avalanche conditions will exist. Expect dangerous avalanche conditions in the backcountry tomorrow as well as the storm continues.

Avalanche Discussion

Yesterday observations on Castle Peak and on Rubicon Peak found soft unconsolidated snow remaining on the N aspects above 8000 ft, and a mix of frozen crusts and wet sticky snow below 8000 ft. on northerly aspects and on all other aspects up to above 9000 ft. Snowpit data and general observations did not reveal signs of lingering slab instabilities and indicated that the snowpack should be ready to handle new snow loading. 

Regioni coperte