Boletín de aludes

Northwest Coastal

Feb 21 – 22, 2013Avalanche Canada
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Archivado · caducó 14 years ago

Peligro de aludes

Sat
Sun
Alta montaña
4 · Fuerte
Límite del bosque
4 · Fuerte
Bajo el límite
3 · Notable
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Lo esencial

Problemas de aludes

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–4
    The recent snow and wind have been building cornices on lee features. These cornices are likely weak and may fail at anytime. Cornice failure has the potential to trigger large avalanches.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Very Likely
    Tamaño
    2–6
    New snow may not bond well to the previous snow surface (surface hoar, wind slab, crust) and may be easily triggered by additional loading. Be especially wary of exposed north through east facing slopes where wind loading is likely.

Confidence

Fair - Timing of incoming weather is uncertain

Weather Forecast

Synopsis: A series of frontal systems is expected to affect the region over the next few days. The strongest system is on track for Friday. Friday: Heavy snowfall – 20-30 cm. The freezing level remains around 500-600 m and winds are moderate to strong from the west.Saturday: Cloudy with light snow. The freezing level is around 500 m and winds ease to moderate from the southwest. Sunday: Moderate to locally heavy snow. The freezing level is around 400-500 m.

Avalanche Summary

Most recent activity on Wednesday was limited to small loose wet or dry avalanches in steep terrain; however, observations were limited due to poor visibility.

Snowpack Summary

15-25 cm of new snow overlays a crust, old wind slab, or surface hoar depending on aspect and elevation. Pockets of new wind slab are likely in lee or ridges and terrain features and in cross-loaded gullies. Below this the recent storm snow has settled and gained strength over the past couple days. Cornices that now loom over many features may become weak with continued growth and/or daytime warming. The mid and lower snowpack layers are generally well settled.

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