Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

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In sintesi

LOW avalanche danger exists for all elevations through New Year's Day. Even though avalanche activity is unlikely, other problems could arise resulting from the firm and challenging snow surface conditions on most exposed slopes. This forecast will be updated again on January 2, 2019.

Problemi valanghivi

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    Challenging snow surface conditions resulting from the strong shifting winds over the last several days pose a potential problem in the backcountry. Expect to find a mix of firm scoured crusts, hard wind slabs, wind-sculpted snow, and exposed ground in wind-exposed near and above treeline terrain. Some wind-affected snow surfaces may also exist in below treeline terrain. In the most wind-sheltered below treeline terrain areas of soft snow may still exist. Avalanche activity remains unlikely, but finding a small unstable wind slab on an isolated terrain feature may not be impossible. 

    The difficult snow surfaces mentioned above could make traveling in exposed terrain onerous and any falls could have consequences. A travel plan that focuses on finding sheltered areas where soft snow may still exist could help find more fun snow and avoid unwanted surprises resulting from falls or an unlikely but not impossible wind slab. Continue to manage your group by using good travel techniques while moving through the backcountry.

Avalanche Discussion

* Observations yesterday from Silver Peak and Tamarack Peak found variable wind affected snow surfaces ranging from firm uneven sastrugi to hard wind slabs to exposed rain crusts to exposed dirt in exposed near and above treeline terrain.  

* Sheltered near and below treeline areas on Silver Peak still held some weak, soft, unconsolidated snow but areas where consistent soft snow existed were harder to find. 

* Snowpit data from Silver Peak showed that the weak snow layers existed in the upper third of the snowpack continue to lose strength. Monitoring these weaknesses will continue as they represent a potential problem during future loading events.

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