Boletín de aludes

Purcells

Apr 17 – 18, 2013Avalanche Canada
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Archivado · caducó 13 years ago

Peligro de aludes

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

If you have any snowpack or avalanche observations, feel free to send them to [email protected]. We'd love to hear from you.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–4
    Wind slabs exist on a variety of aspects at treeline and above. Cornices have grown large. Be aware of overhead hazard and stay back on ridgelines.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–6
    A weak interface buried in the upper metre of the snowpack can create surprisingly large avalanches. It's been reactive in nearby regions, and remains a concern with professionals. Be cautious in alpine terrain.

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain

Weather Forecast

Thursday: Overcast. Light precipitation amounts. Ridgetop winds light-moderate from the West. Freezing levels rising to 1900 m. Friday: Overcast. Light precipitation amounts. Ridgetop winds moderate from the West. Freezing levels 1900 m. Saturday: Overcast. Light-moderate precipitation amounts. Ridgetop winds light- moderate from the NW. Freezing levels 1600 m and falling to valley bottom overnight.

Avalanche Summary

On Tuesday, a natural size 2 cornice fall was reported from an East aspect at 2400 m. This failure occurred under the influence of the sun and did not pull a slab on the slope below. In the adjacent region a size 2 slab avalanche was skier triggered on a NW aspect at 2500 m. The hard slab failed 3 m above the skier. There were no injuries. On Sunday, a naturally triggered size 2.5 slab failed on a buried crust. In Glacier National Park, skiers triggered a size 3 slab on a buried crust on an east aspect in the alpine on Monday.

Snowpack Summary

Recent storm snow and variable winds have formed wind slabs at treeline and above. Cornices on ridgelines have grown large, and pose a threat to slopes below.A weak interface buried early April is down about 60-120 cm and consists of a crust on solar aspects, and surface hoar on high-elevation northerly aspects. The slab above this interface may be reaching it's tipping point with additional loading from forecast snow and wind.

Regiones cubiertas