Lawinenlagebericht

Central Sierra Nevada

Sierra Avalanche Center
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Lawinengefahr

Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
2 · Mässig
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Veraltet — dieser Lagebericht ist 9 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

MODERATE avalanche danger will exist on all aspects today due to rapid warming weakening the recent snow. Widespread loose wet avalanches will be likely today. The warming will also weaken existing slabs making human triggered wind and wet slab avalanches possible today as well.  Evaluate the snowpack and terrain carefully to identify where avalanche problems may exist and plan a route that avoids the potential avalanche problems. 

Lawinenprobleme

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1

    Widespread loose wet avalanche activity will become likely at all elevations today as the intense March sunshine warms up the new snow for the first time. Loose wet avalanches could entrain enough snow to cause problems for backcountry travelers and some larger loose wet avalanches that involve enough snow to bury a person could occur. The largest and most widespread loose wet avalanche activity should occur on sun-exposed E-SE-S-SW-W aspects but some loose wet activity could also occur on northerly aspects that receive sunshine.

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1

    The sunshine will also weaken the wind slabs that formed during the storm by warming them up and melting the bonds holding the snowpack together. Avalanches involving these sun-weakend and now wet wind slabs will be possible today. Sun-exposed E-SE and W aspects hold the best potential for these slab avalanches but wind slab avalanches will also be possible on NW-N-NE aspects especially in areas where these northerly aspects see some sun. Some wet slab avalanches may also be possible on sun-exposed SW and S aspects due to sun on new snow. 

Avalanche Discussion

Yesterday observations from below 7500 ft. on Hidden Peak found about 2 inches of new snow on top of a supportable frozen rain crust with wet snow below the crust. Above 7500 ft. new snow totals increased and up to 6 inches of new snow existed at the higher elevations. Winds remained light in this area yesterday and no signs of problematic wind slabs existed in the expected locations. Ski cuts on steep test slopes did trigger some small loose dry sluffs. Across the Lake on Tamarack Peak 6 to 12 inches of new snow existed. Some minor cracking occurred near the top of the Proletariate, but the cracks remained small and did not propagate very far.  

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