Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Tue
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 5 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Continued warm weather and a potentially poor refreeze mean that wet loose avalanches may be possible in some areas as the day warms up. If the snow feels too mushy, or if you start sinking into boot-top-deep wet snow, consider moving away from avalanche terrain.

Problemi valanghivi

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5

    Expect variable snow conditions that change during the day. Some places may remain mostly firm, some may get wet and mushy. Pay attention to the snow as you travel. If the snow starts feeling mushy, unsupportable, or you start sinking up to your boot-tops in wet snow, it's time to consider moving away from avalanche terrain. 

    Variable cloud cover and temperatures overnight likely led to a variable refreeze, with stronger refreezes in areas with clearer skies and colder temperatures, and weaker refreezes in areas with warmer temperatures and clouds. While today may be slightly cooler than previous days, it should still get warm enough to form wet snow in some places. Cloud cover may help limit how fast the wet snow forms on typically sunny slopes, but it may also help distribute warmth to typically shady slopes. Wet surface snow could form on a variety of aspects today, and wet loose avalanches may become possible on some slopes if enough wet snow develops. 

    Repeated melt-freeze cycles and previous rain events have transformed the snowpack into late-spring or even summer-like snow with well-established drainage. This means that most wet loose avalanches should remain small. Still, an isolated, larger wet loose avalanche might be possible on a long, steep slope, where a small wet loose avalanche could entrain more snow as it slides downhill. Keep in mind that small avalanches can have increased consequences in exposed terrain.

Avalanche Discussion

Rain, snow, and wind will bring other avalanche problems back to the forecast area in the next few days. 

March's record-setting heat and strong sun have caused dramatic snowmelt on all aspects and elevations, especially below 8000'. Large areas of bare ground and open, flowing creeks with few to no snow bridges are making the approaches to terrain difficult in many places. Areas with available snow and minimal walking are limited to the highest trailheads in our forecast region.

Northerly aspects offer better snow coverage, but obstacles like rocks, stumps, and logs have melted out on these slopes as well.

Long, sliding falls remain a hazard in areas with frozen snow surfaces.

Regioni coperte