Boletín de aludes

Banff Yoho Kootenay

Dec 7 – 8, 2014Parks Canada
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Archivado · caducó 12 years ago

Peligro de aludes

Sun
Mon
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Lo esencial

Warmer temperatures and moderate W winds will help create more of a slab over the weak base in our snowpack. Human triggered avalanches remain possible especially in areas with recent wind effect.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2
    Mild temperatures and moderate W winds will cause wind slabs to develop in exposed areas at tree line and above. Watch for pockets of hard slab near ridge tops and on cross loaded features.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    2–3
    The primary problem in the snowpack is the interface between the recent storm snow and the November 6th and 24th facet/crust interfaces. This is the problem responsible for the majority of the avalanches in the past week. Watch for remote triggering.

Weather Forecast

Mild temperatures, moderate W winds and a few flurries are forecast for tonight with a bit of a clearing trend on Sunday and Monday. Tuesday we may see a few more flurries but accumulations are expected to be minimal.

Snowpack Summary

Warmer temperatures today are promoting settlement of the upper snowpack and creating more of a slab over the basal facets especially in wind affected areas. The lower half of the snowpack is poorly structured, with facets (Nov 24th) below the recent storm snow, thin crusts (Nov 6th) below this, and then depth hoar near the ground.

Avalanche Summary

Little natural activity has been observed recently however explosive triggered slab avalanches up to size 2.5 were reported yesterday from the ski areas with the slab failing on the basal facets and crusts near the ground. These kinds avalanches would result in a dirty, rough ride through scree, rocks and trees and human triggering is possible.

Confidence

Due to the number of field observations

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