Bollettino valanghe

Central Sierra Nevada

Sierra Avalanche Center
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Pericolo valanghe

Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
3 · Marcato
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Non aggiornato — questo bollettino è scaduto 9 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Avalanche danger will increase to CONSIDERABLE today as a storm system moves through the forecast area. Wind slab and storm slab avalanche problems are expected today. Loose wet avalanche problems are also a possibility. A gradual increase in snowpack instability is expected this morning, transitioning to a rapid increase in snowpack instability this afternoon. Dangerous avalanche conditions will form today. Identify and avoid potentially unstable slopes.

Problemi valanghivi

  • Wind Slabs

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

    New snow and wind will allow wind slabs to build throughout the day today with a period of rapid development expected this afternoon and evening. The vast majority of wind slabs will form near treeline and above treeline on NW-N-NE-E-SE aspects today. Wind slabs could also form in isolated areas on S-SW-W aspects, as well as in isolated areas below treeline.

    Identify and avoid steep slopes where drifting snow is accumulating, slopes that are below cornice features, and steep slopes with newly formed wind pillows.

  • Loose Dry

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

    The period of high intensity snowfall that is expected this afternoon and evening may create storm slabs. Varying snow levels today could also create upside down storm snow layering. These storm slabs could form in wind protected areas near treeline and below treeline on all aspects. On E-SE-S-SW-W aspects, new snow will likely deposit on top of melt-freeze crust formed yesterday. On NW-N-NE aspects new snow could deposit on top of either melt-freeze crust or recent storm snow, depending on elevation and slope angle.

    Look for areas of snow surface cracking while making fresh tracks either uphill or down. Avoid steep slopes in areas where snow surface cracking exists.

  • Loose Wet

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

    New snow that is deposited this morning could be rained on as snow levels rise today up to around 6,500' to 7,000'. Small loose wet avalanches could occur in areas that receive rain on snow today.

    Avoid travel on or below steep slopes where rain is falling on a few inches or more of recent new snow.

Regioni coperte