Bollettino valanghe

Eastside Region

Eastern Sierra Avalanche Center
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Pericolo valanghe

Sat
Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 4 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

 Increasing winds may create fresh wind slabs in leeward terrain features. Keep an eye out for blowing snow and recent drifting. Use caution around steep leeward terrain.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5

    New wind slabs could be found today at upper elevations where strong southwest winds are drifting loose surface snow into leeward terrain features. Last night, winds increased to over 50 mph at ridgetops. There is potential for blowing snow and new wind slab accumulation in isolated areas today. Snow plumes over ridges and blowing snow on the snow surface are indications that wind slabs may be building in your area. The size of new wind slabs should be limited by the amount of available snow above the treeline. Windward slopes have already been wind scoured and melt-freeze crusts are holding snow in place on south aspects.  Reassess surface conditions as you encounter terrain features that block or re-direct wind and use extra caution when transitioning to steep terrain. Be on the lookout for fresh cohesive wind-deposited snow. Shooting cracks or hollow-sounding snow are good indications that the problem exists in the terrain around you. 

    (1/31/2023)

    Localized cracking in soft wind slabs. East aspect in the June area.

Avalanche Discussion

Wind slab likelihood has increased today from unlikely to possible due to the potential for new wind slab formation with today's wind. Danger has been kept at Low (Level 1) because there is relatively little snow available for transport. While some new slab development is possible, resulting wind slabs are likely to be small and isolated in distribution. 

A winter storm watch is in effect for Mono County from Saturday night to Sunday night. Observations over the past week have focused on faceting in the upper snowpack during the recent period of clear weather. Now is a good time to take an inventory of snow surfaces on a variety of aspects and elevations. Today's surface snow will likely be next week's weak layer. Once these surfaces are buried by this weekend's storm it will be more difficult to track their distribution across the terrain. 

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