Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

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Limite del bosco
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In sintesi

Low avalanche danger continues throughout the forecast region on all aspects and elevations.  Normal caution is advised.  Use proper backcountry travel protocols to further reduce your risk while traveling through avalanche terrain.  Early season conditions exist in most areas.

 

 

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    0

    Normal caution is advised today while traveling in the backcountry.  Make sure to have a travel plan and discuss it with your group.  Watch out for unstable snow on isolated terrain features.  Expose only 1 member of your group to avalanche terrain at a time and re-group in areas out of avalanche terrain.  An early season snowpack exists throughout the area.

    Very isolated wind slabs will be possible on SE-S-SW-W-NW aspects today.  Continued NE/E winds in the strong to gale force range will allow for further scouring of snow near and above treeline.  E wind gusts are forecasted to be near 100mph through today.  In some areas, snow available for transport may be limited and this transported snow may be deposited on terrain with little to no snow coverage with many anchors.  If wind slabs do form, they are expected to be small, near ridges, and not extend very far downslope.  Watch for blowing snow, cornice formation, and wind pillow development.

    Weak faceted snow continues to exist near the base of the snowpack buried 1 to 3 feet deep on North aspects along the northern portion of the Sierra Crest above 8300' and in the Mt. Rose area above 9300'.  There have been no avalanches associated with this persistent slab and ongoing snowpack tests have indicated that this PWL would be hard to trigger at this time.  Practice proper travel protocols while ascending and descending in this specific terrain.  While triggering a persistent slab avalanche is unlikely, taking basic steps to reduce risk in this terrain makes sense. 

Avalanche Discussion

Observations on Castle Peak (Donner Pass area) showed active wind loading and wind scouring throughout the area.  Small wind slabs were forming from the north winds but were limited in size and extension downslope.  The small wind slabs encountered did not pose any issue for backountry travel in this area.  

Observations near Lincoln Ridge (Yuba Pass area) showed 2.5 feet of snow at 7500' on protected north aspects.  Unconsolidated snow existed in protected treed areas while upper elevation exposed areas showed more wind scouring. 

The deepest and most usable snowpack within the forecast area exists along the northern portion of the Sierra Crest. Along the Sierra Crest south of Tahoe City, snowpack depths decrease, even at the highest elevations. Recent storms have added to the snowpack in all areas but many rocks and shallowly buried obstacles still exist. The Mount Rose area in the NE portion of the forecast area has decent snowcover, but impact with rocks remains likely at the lower elevations in this area as well.

All of the recent avalanche and snowpack observations submitted by local users have been greatly appreciated and have contributed towards producing the best possible avalanche advisories. Please continue to submit observations through the "submit observations" buttons found throughout this website.

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