Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 7 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

MODERATE avalanche danger will remain with wind slabs possible in near and above treeline areas.  LOW avalanche danger will continue in below treeline terrain.  This two day avalanche forecast will be updated on Thursday morning by 7am. 

Problemi valanghivi

  • Wind Slabs

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

    High winds and changing wind directions have been scouring exposed near and above treeline areas over the last week.  This has left wind exposed terrain with a variety of hard slabs, scoured firm crusts, and some areas of wind slabs.  NE/E winds peaked last night with gusts up to 90-100mph.  These winds should decrease somewhat today, but still remain moderate to strong.  Winds change early Wednesday morning to the W then to the NW and increase right back up to gale force by Wednesday afternoon.  With elevated wind speeds and changing wind directions, wind slabs could exist on any aspect in near and above treeline areas.   

    Available snow for transport is becoming limited, but blowing snow is still expected when gale force winds are occurring.  The best chances of finding soft snow will be in the most wind protected below treeline areas away from the wind slab problem.     

Avalanche Discussion

NE winds were moderate to strong on Mt. Judah (Donner Summit area) yesterday transporting snow.  Small wind slabs were building on SW-W aspects in near and above treeline areas.  These wind slabs were small in size and did not extend very far downslope.

Buried surface hoar was found at Tamarack Junction (Carson Pass area) yesterday.  This buried surface hoar was under a couple inches of new snow that fell yesterday.  Only slightly buried, this layer does not represent a current avalanche problem , but will require further monitoring.

Dense fog and freezing fog was reported in multiple locations yesterday morning. 

Regioni coperte