Boletín de aludes

Banff Yoho Kootenay

Nov 18 – 19, 2011Parks Canada
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Archivado · caducó 15 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

Easily triggered avalanches up to size 1.5 have been observed in the last week. Open steep terrain with wind loading should be carefully evaluated or avoided. This severely limits choice as this is the terrain with enough snow to travel. JBW

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    All slopes that look inviting for skiing have a wind slab over depth hoar layering. Cracking, whumphing and skier triggered avalanches have been observed. This layer collapses with Easy results. Pick lower angled low consequence terrain.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2
    Steep open slopes at and above treeline have a soft to hard wind slab that is sensitive to human triggering near the ground on the basal depth hoar. In isolated areas the Nov 7 surface hoar layer fails and then steps down. Sa size 1.5 at Bow Summit

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the number and quality of field observations

Regiones cubiertas