Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 12 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Avalanche danger remains LOW for all elevations and aspects.

Normal caution is advised.

Problemi valanghivi

  • Cornices

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

    A decent to strong snow surface refreeze is expected to have occurred again last night driven mostly by radiational cooling under clear skies. Sunny skies this morning and above freezing air temperatures at sunrise will allow wet surface snow to form in sun exposed areas as the morning progresses. As cloud cover increases from south to north over the forecast area today, the rate of surface wet snow formation will slow during the afternoon hours as compared to recent days. This is expected to keep areas of surface wet snow instability from forming today. If cloud cover does not materialize by early afternoon as forecast, isolated areas of small and generally inconsequential surface wet snow instability may form on steep sun exposed slopes.

    Other hazards to manage today include exposed rocks on southerly aspects and difficult to travel firm icy surfaces on near and above treeline northerly aspects.

Avalanche Discussion

Observations made yesterday on Waterhouse Peak (Luther Pass area) showed very thin snow cover below 8,000' making over snow travel difficult. Above 8,000' snowpack depth increased rapidly and over snow travel conditions were very manageable. This is representative of areas on the east side of Lake Tahoe. On the west side of the lake, decent snow cover is generally found above 7,200' to 7,500'. On Waterhouse Peak, fairly well developed near surface facets were noted above 8,000' on shaded northerly aspects in this area. With no major new snow loading events in the forecast, this is not an immediate concern. Otherwise, the snowpack was well bonded with good stability in the mid and basal layers. Wet surface snow up to 1 inch deep was observed on E aspects at 9,000' at 11 am. Shaded areas on northerly aspects held a thin surface crust from past melt-freeze cycles.

Regioni coperte