Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Sat
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 4 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Strong sunshine and warm air temperatures today will create widespread areas of wet surface snow.  Watch out for areas of unstable wet surface snow in sun exposed avalanche terrain. Exercise caution in or below avalanche terrain and consider exiting the area when signs of unstable wet snow such as rollerballs, pinwheels, or recent avalanches are occurring.

Problemi valanghivi

  • Loose Wet

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

    A strong snow surface refreeze is expected to have occurred last night. As daytime warming progresses under the strong mid-March sun, snow surface melt will allow for the possibility of wet loose avalanches.  This will mainly cause concern for avalanche terrain across ENE-SE-S-SW-WNW aspects. Wet loose snow avalanches, mostly triggered by backcountry travelers are possible today.

    Areas of unstable snow are expected to develop as the day progresses, especially during the late morning and afternoon hours. Signs of potentially unstable wet snow such as rollerballs, pinwheels, or recent wet loose avalanches indicate that it is time to exercise increased caution in or below avalanche terrain. When signs of unstable snow are present, consider exiting the area. Even a small avalanche can become consequential when occurring on long open slopes, above rocks or cliffs, or into a terrain trap.

    Triggering rollerballs and pinwheels like this is an indication that it is time to exercise increased caution in avalanche terrain.

Avalanche Discussion

  • Rain and wet snow on Tuesday created supportable to breakable crust in many areas, especially below 8,600' or so.
  • Snowmelt on SE-S-SW aspects has exposed bare ground in many areas. Over snow travel options are limited on these aspects.
  • The old facet layer that was buried on Feb 14 appears to have gained sufficient strength to handle tomorrow's new snow loading event. It is unlikely that an avalanche problem will occur on this layer.

Regioni coperte