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 12 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Avalanche danger remains LOW for all elevations and aspects.

Normal caution is advised.

Problemi valanghivi

  • Cornices

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

    Warming air temperatures at the upper elevations are expected to produce a few inches of surface wet snow as daytime warming progresses. Any areas of wet snow instability that form today are expected to remain minimal and not pose a significant threat to backcountry travelers. Areas around exposed rocks and bushes may become full depth wet snow. These areas already have well established free water drainage and are not expected to pose much of an instability issue.

    On northerly aspects the weak layer of generally poorly developed near crust facets that exists below the uppermost rain crust within the snowpack warrants continued monitoring. Finding an area where this weak layer is capped by a slab with the proper characteristics for a slab avalanche to occur remains highly unlikely. As evidenced by the recent small avalanche on Castle Peak, it is not an impossibility. Do not allow this dry spell to generate complacency for best practice travel techniques in and around avalanche terrain.

Avalanche Discussion

Observations made yesterday on Tamarack Peak (Mount Rose area) revealed no evidence of instability. Upper elevation northerly aspects continue to exhibit faceting in the mid and upper snowpack. In the vast majority of areas, any relative weak layers lack an overlying slab conducive to slab avalanche activity. The recent small slab avalanche that occurred sometime within the past week or so on Castle Peak on a NW aspect at 8,500' (more info) indicates that very isolated areas exist where the slab/weak layer combination is conducive to slab avalanche activity. Recent observations from around the forecast area indicate that these places are very few, very isolated, and difficult to find.

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