Bollettino valanghe

Northwest Inland

Mar 15 – 16, 2012Avalanche Canada
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Archiviato · scaduto 15 years ago

Pericolo valanghe

Sat
Sun
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    New wind slabs are forecast to develop below ridgecrests, in gullies and behind terrain features.

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–5
    Large cornices exist in alpine terrain. A failure could be destructive by itself, and could also trigger an avalanche on the slope below.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    3–5
    The likelihood of triggering persistent layers buried in early February is greatest on steep, unsupported terrain . Although no recent avalanches have been reported, the chances of triggering may increase with solar radiation forecast for the weekend

Confidence

Fair - Due to variable snowpack conditions

Weather Forecast

Friday: Light snowfall - light southwest winds - freezing level at 800m Saturday: very light snowfall with a chance of intermittent sun - light and variable winds increasing in the evening freezing level at 600m Sunday: scattered cloud - light and variable winds - freezing level at 500m

Avalanche Summary

Sluffing in steep terrain was observed on Wednesday. Observations from the region have been very limited.

Snowpack Summary

Moderate amounts of low density snow sit over a variety of old surfaces that include widely distributed hard wind slabs, or melt freeze crusts that exist on most aspects below 1000m and on solar aspects as high as 1600m. In exposed areas the newer snow has been shifted into deeper pockets of soft wind slab. The mid February persistent weak layer interface, comprised of spotty surface hoar, facets and crusts, is buried approximately 80cm below the surface. No recent activity has been reported on this interface, but it should still be on your radar, particularly in steeper, unsupported terrain. Cornices in the area are also reported to be very large and primed for triggering.

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