Boletín de aludes

Central Sierra Nevada

Sierra Avalanche Center
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Peligro de aludes

Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
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Desactualizado: este boletín caducó 8 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

MODERATE avalanche danger will continue as daytime warming occurs due to a loose wet avalanche problem.  Loose wet avalanches will become possible at all elevations today.  Avoid avalanche terrain with unsupportable wet snow.

Problemas de aludes

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1

    Loose wet avalanches will become possible on all aspects and elevations as daytime warming occurs.  Warmer overnight temperatures along with increased cloud cover should provide a more marginal overnight refreeze of the snow surface in most locations.  Snow surface supportability could deteriorate more quickly this morning than over the last several days when a better refreeze occurred.  Roller balls, pinwheels, and loose wet avalanches large enough to injure or bury a backcountry user (size D2) are possible today.    

    Measuring boot and/or ski penetrations are good ways to constantly monitor the snow surface and supportability throughout the day.  Avoid avalanche terrain where natural or human triggered roller balls are occurring.  Unstable snowpack conditions can quickly develop as the snow loses supportability and strength.  

Avalanche Discussion

* Observations yesterday targeted the Feb. facet layer that has been responsible for widespread deep slab avalanche cycles in March.  On Jakes Peak (West Shore area) snowpack tests showed failure on this layer and propagation potential.  Concern exists that the atmospheric river storm forecasted for Fri/Sat could overload and weaken this layer causing failure.

*  Spring snow conditions existed on Jakes Peak (West Shore area) into the midday.  Mostly supportable conditions with soft wet surface snow was present in most areas by 11am.  Unsupportable snow existed throughout the area especially in dense trees, shallow snowpack areas, and around rocks and bushes.  Wet instabilities were limited to small roller balls while downskiing.

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