Lawinenlagebericht

Central Sierra Nevada

Sierra Avalanche Center
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Lawinengefahr

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Waldgrenze
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Unterhalb
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Kernpunkte

LOW avalanche danger exists on all aspects and elevations. LOW danger does not mean "no danger" and small avalanches could still occur in isolated areas or extreme terrain. Practice safe backcountry travel habits like moving one at a time from safe zone to safe zone to reduce your risk while traveling through avalanche terrain. Early season conditions exist with numerous exposed and shallowly buried obstacles in most areas.

Lawinenprobleme

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    Avalanche activity remains unlikely today; however, some unstable snow could still exist on isolated terrain features especially in complex or extreme terrain. Small avalanches can have big consequences especially when the snowpack remains shallow. Even though the avalanche danger remains LOW continue to practice safe back-country travel habits. Make a travel plan, discuss it with your group, and share it with someone who will not be on your trip. Continue to evaluate the snowpack and terrain and watch out for those isolated terrain features where unstable snow may remain. When moving into or through potential avalanche terrain, only expose one member of your group at a time. Identify safe zones out of avalanche terrain and re-group in those areas. Practicing these techniques now will make them habits that will serve you well when increased avalanche danger exists.

    While LOW avalanche danger means less avalanche hazard, the shallow snowpack means more exposed and shallowly buried obstacles to hit. Collisions with these exposed or barely covered rocks, logs, stumps, trees, and other hard immovable objects can break equipment and people. Enjoy the snow, but be careful so that the enjoyment will last all season long.

Avalanche Discussion

Yesterday observations from Grouse Rocks and Red Lake Peak showed widespread wind scouring on the exposed near and above treeline slopes. Wind created surfaces like wind crusts, sastrugi, ripples, etc. existed across a wide variety of aspects and extended into some traditionally sheltered areas. Observations from these areas did not reveal any signs of instability. A snowpit submitted by a Level 1 avalanche class from a lower elevation E facing aspect on Donner Summit showed a shallow snowpack consisting of mostly consolidated snow. 

On a N aspect on Red Lake Peak snowpit data showed a persistent weak layer buried near the base of the snowpack, but tests on this layer indicated that triggering it has become unlikley. While it may not represent a current avalanche problem, it still warrants monitoring to see if it could re-awaken during a future loading event. Persistent weak layers have been found on N aspects along the Sierra Crest above 8300' and in the Mt. Rose area above 9300'. There have been no avalanches associated with these layers.

The Sierra Crest north of Tahoe City and the Mt. Rose backcountry harbor the deepest and most usable snowpack within the forecast area. Even in these more snow covered areas early season conditions still persist and many obstacles remain. Along the Sierra Crest south of Tahoe City, the snowpack becomes more shallow with many more exposed and barely covered obstacles even at the upper elevations.

We greatly appreciate all of the recent avalanche and snowpack observations submitted by local users. This data helps us craft better advisories. Please continue to submit observations through the "submit observations" buttons found throughout this website. Remember any information you have can help. Simple weather and snowpack observations like how deep do you sink in the snow,  have you seen any avalanches or signs of instability, did you see snow blowing at the ridgelines are all helpful. Of course, we will take more detailed observations like snowpit data, videos, or photos as well. 

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