Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Open full map
Non aggiornato — questo bollettino è scaduto 10 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Low danger exists on all aspects and elevations this morning.  As daytime warming occurs and as slopes receive direct sun, avalanche danger will rise to Moderate on E-SE-S-SW-W aspects due to the possibility of loose wet avalanches.  Most of these loose wet avalanches will be in the form of point releases, pinwheels, and roller balls.  Evaluate terrain and monitor changing conditions in your area.   

Problemi valanghivi

  • Loose Wet

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

    More sun and slightly warming temperatures will increase the chances for loose wet instabilities today.  Most of these instabilities will be in the form of roller balls, point releases or pinwheels and could occur on E-SE-S-SW-W aspects at all elevations on slopes steeper than 35 degrees.  In areas that receive large periods of sun with intense solar radiation, expect more widespread loose wet activity to occur.  The size of these loose wet avalanches could be much larger north of Hwy. 50 where we received more recent storm snow.

    Look for small surface instabilities like roller balls, pinwheels, or point releases. Once the surface snow becomes wet it's time to change aspects and move off and away from slopes that are 35 degrees or steeper. Terrain traps like gullies, creeks, and cliffs can greatly increase the risk of any size loose wet avalanches.

Avalanche Discussion

Observations were made and received yesterday from Tamarack Peak (Mt. Rose area) and Blue Lakes (Carson Pass area).  The Tamarack Peak area showed settlement of the recent storm snow with improved bonding to the underlying melt freeze crust.  Signs of wind scouring from NW winds were present with small wind slabs noted on SE aspects along ridgelines.  Sunny skies were present with little signs of loose wet instabilities.  Sun crusts were developing on all solar aspects.

At Blue Lakes there were large periods of sun throughout the morning and into the early afternoon.  Much less recent storm snow fell this far south with 2-3'' of snow on top of a supportable melt freeze crust.  Very minor evidence of any wind occurring in this area with no signs of wind slab development.  Small roller balls were occurring on E-SE aspects by mid day. 

Regioni coperte