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 9 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

MODERATE avalanche danger continues at all elevations due to ongoing wind slab and loose wet avalanche problems. Human triggered avalanches are possible today. Natural avalanches are unlikely but not impossible in isolated areas. Identify and avoid areas of potential wind slab and loose wet avalanche problems. A small chance exists that a rapid warming situation could occur this afternoon.

Problemi valanghivi

  • Wind Slabs

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

    Additional wind and snow above 7,500' last night is expected to have created additional wind slab avalanche problems above 7,500'. The vast majority of wind slabs are expected near treeline and above treeline on NW-N-NE-E-SE aspects. Avalanche size could be large enough to bury or injure a person.

    Identify and avoid areas of recent wind slab formation often found below or adjacent to cornice formations and wind pillows.

  • Loose Wet

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

    Rain on snow has created wet surface snow on all aspects below 7,000' to 7,500'. Loose wet avalanche problems remain possible in these areas. Avalanche size could range from small to large enough to bury or injure a person, especially if a terrain trap is involved. In the unlikely event that significant sun breaks occur this afternoon, loose wet avalanche problems could extend to higher elevations.

    Avoid travel on or below steep slopes where a few inches or more of wet surface snow exists.

  • Persistent Slabs

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

    There is a small chance that skies could clear enough this afternoon to allow for sufficient incoming solar radiation to create a rapid warming situation. In the unlikely event that this occurs, wet slab avalanche problems could develop in sun exposed areas on any aspect that holds a few inches or more of new snow. Be cognizant of any sun breaks that occur today, especially if they last longer than a few minutes. It's getting to be mid to late April and solar radiation is much more intense and influential on snowpack instability than it was during February and March.

Avalanche Discussion

Observations made yesterday on Tamarack Peak (Mount Rose area) revealed light rain as high as 9,000' and moderate snow showers as low as 8,500'. Dense new snow in wind loaded areas showed some indications of a difficult to trigger wind slab avalanche problem.

Regioni coperte