Boletín de aludes

Central Sierra Nevada

Sierra Avalanche Center
Ver en el mapa

Peligro de aludes

Wed
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
Desactualizado: este boletín caducó 4 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Warm weather and strong March sunshine will create wet snow that could slide down slopes today. Watch and feel for signs of unstable wet snow like wet surface snow, rollerballs, pinwheels, or recent avalanches. When you see clues like these, it’s time to move away from steep slopes that are capable of producing avalanches.

Problemas de aludes

  • Loose Wet

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

    Clear skies overnight should have allowed the snowpack to radiate enough heat out into the atmosphere for it to refreeze despite above freezing temperatures in many places last night. Strong sun and warm weather today will melt through this refreeze quickly creating a layer of wet snow on many slopes. Wet loose avalanches will be possible as the day warms up. Some of these could entrain enough snow to cause problems for backcountry travelers especially if they occur on long steep slopes or around terrain traps like gullies, cliffs, and creeks that magnify the consequences of these avalanches. Wet snow will be most prevalent on the E-SE-S-SW-W aspects, but some wet snow could also form on northerly aspects due to the high sun angles at this time of year. 

    Signs of potentially unstable wet snow include rollerballs, pinwheels, boot-top deep wet snow, or recent wet loose avalanches. Traveling on lower-angle terrain that is not below avalanche terrain or timing your travel to be off the snow before it gets too wet represent good strategies to avoid wet snow problems.

Avalanche Discussion

  • Observers reported some small skier-triggered wet snow sluffs around 11:30 am yesterday. Rollerballs and pinwheels also occurred yesterday on all aspects by noon. 
  • Snowmelt on SE-S-SW aspects has exposed bare ground in many areas limiting snow travel options on some of these aspects.
  • Melt-freeze crusts, previous wind scouring, and snowmelt should have limited the amount of blowing snow last night despite strong NE winds. 
  • The old facet layer that was buried on Feb 14 still exists on some NW-N-NE aspects. Data and observations indicate that it is gaining strength. 

Regiones cubiertas