Boletín de aludes

Central Sierra Nevada

Sierra Avalanche Center
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Peligro de aludes

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

Lo esencial

Avalanche activity has become unlikely for most of the forecast area. Still, triggering an avalanche may not be impossible on an isolated terrain feature in extreme terrain filled in with wind-blown snow. Continue to use best-practice backcountry travel techniques, such as only exposing one person at a time to steep slopes and assessing the snow and terrain as you travel.

The next update to the avalanche forecast will occur on Jan 2, 2025 @ 7:00 am.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    1–2

    The slabs of wind-blown snow formed on leeward slopes during the last storm continue to bond to themselves and the old snow surfaces below them. As the snowpack gets stronger, triggering an avalanche becomes more difficult. At this point, avalanche activity has grown unlikely for most of the forecast area. When the winds increase on Wednesday, limited snow remains available for transport near and above treeline.

    Most people will not see signs of unstable snow or trigger avalanches today. Still, unlikely does not mean impossible. An unstable wind slab or two may still lurk on an isolated terrain feature, especially in extreme terrain like steep alpine couloirs or exposed cliffy areas or on a hanging snowfield without support from below. Unfortunately, unexpected avalanches can have more serious consequences in this terrain.  

    Continue to identify areas where wind-blown snow has piled up by looking for clues like cornices above a slope, piles of drifted snow, and wind-created surface textures. If you see signs of unstable snow like cracking or hollow sounding/feeling snow, you may have found one of those isolated spots where a wind slab might linger. In this case, moving on to a different area makes sense. In general, smoother, softer, and more consistent snow exists in areas sheltered from the winds. 

Avalanche Discussion

Despite the incremental loading during the recent storms, no signs of instability related to the deeper weak layers that linger above 8,000' to 8,500' in the eastern and southern portions of the forecast area have been reported. A thick layer of refreezing wet snow exists above these layers in many places. As this wet snow refreezes, the snowpack will continue to gain strength. 

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