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
2 · Moderato
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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 MODERATE for all elevations and aspects on slopes 35 degrees and steeper due to a mix of loose wet snow and lingering wind slabs.

Problemi valanghivi

  • Loose Wet

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

    Widespread areas of wet snow are expected today on all aspect below 8,800'. Poor overnight refreeze and areas of rain this morning have kept loose wet avalanche concerns from yesterday ongoing on slopes 37 degrees and steeper. Small human triggered loose wet avalanches are possible today at nearly all elevations on E-SE-S-SW-W aspects and below 8,800' on NW-N-NE aspects. Natural loose wet avalanches will become possible again tonight as rainfall rates increase and snow level rises.

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    2

    Above 8,800', unstable wind slabs may linger in isolated areas of near treeline and above treeline terrain on NW-N-NE aspects. Isolated human triggered slab avalanches with slab depths of 1 to 3 feet are unlikely but not impossible today in these areas.

Avalanche Discussion

Observations made yesterday on Jake's Peak (West Shore Tahoe area) and on Donner Peak (Donner Summit area) showed warm air temperatures and minor loose wet snow instability. Small loose wet avalanches were observed to occur naturally beginning around 9 am as wet snow began to fall off of rocks and trees in steep terrain. These conditions continued throughout the day as sun breaks and solar heating through thin fog continued to increase air temperatures and partial clearing allowed for more incoming solar radiation.

Snowpit data collected near the summit of Jake's Peak in a previously wind loaded area indicated that isolated areas of unstable wind slab remain on N-NE aspects above 8,800'.

Regioni coperte