Boletín de aludes

South Rockies

Mar 6 – 7, 2012Avalanche Canada
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Archivado · caducó 15 years ago

Peligro de aludes

Thu
Fri
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
3 · Notable
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Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    2–5
    Wind slabs fueled by gusty NW winds and new snow will be a widespread issue in wind exposed terrain.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    2–6
    Continued snowfall Monday night may be enough to wake up the Feb. 08 SH. Avalanches failing on this layer have the potential to be large and destructive.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–4
    New snow should bond well to the old snow surface, but be careful with convex rollers and unsupported slopes where the chances of triggering an avalanche are increased.

Confidence

Fair - Due to limited field observations

Weather Forecast

Until yesterday the weather story was all about snow with the last storm starting warm and finishing cold. Monday overnight a cold front came through. Looking forward the story for Wed & Thurs is sunshine - warm temperatures and SOLAR WARMING. Freezing overnight. Moderate NW winds. Friday becoming cloudy, maybe flurries ahead of the next forecast system.

Avalanche Summary

Tuesday reports are of solar triggered avalanches on sunny slopes (small and loose). Professionals were successfully & intentionally triggering small avalanches during control work in the new snow.

Snowpack Summary

20 to 50 cm of recent storm snow reported from the regions. Feb. 09 surface hoar is now down between 40 & 100cm. The depth varies throughout the region. This weak layer continue to perform and snowpack tests continue to show sudden moderate failures on this interface. The weekend's strong winds and mild temperatures formed the upper snowpack into a more cohesive slab. Lingering concern remains for basal facets, particularly in shallower snowpack areas with steep, rocky start zones. I suspect windslabs are developing with the forecast wind and recent snow.

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