Boletín de aludes

Jasper

Jan 10 – 11, 2014Parks Canada
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Archivado · caducó 13 years ago

Peligro de aludes

Fri
Sat
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    The upper snowpack is a stratified layer of multiple windslabs. Recent field tests have produced failures with moderate shear strength. Currently this condition is less prevalent at treeline. Forecasted snowfall and wind will increase this concern.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3
    Many avalanche paths have already slid in the 2,400 m - 2,800 m range. Slopes that have not failed are expected to fail with the increased snow loading and winds this weekend.

Weather Forecast

A forecast of snow flurries and light winds should do little to change the avalanche hazard in the next 24 hours.

Snowpack Summary

Last weekend's storm snow overlies older wind slabs. In the alpine this newer snow has itself be blown into storm slabs which shear with easy to moderate force. The base of the snowpack is weak and unstable at all elevations. Near treeline the midpack is supportive and untracked powder can be found in wind sheltered locations.

Avalanche Summary

Increased loading with new snow and wind forecast for the weekend will renew avalanche activity at treeline and above. Field team noted the debris of 2 sz 2.5 slab avalanches which had released in the last 24 hours on the basal facets at alpine elevations. Control work with large explosives only produced small slides below treeline today.

Confidence

Intensity of incoming weather systems is uncertain on Saturday

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