Boletín de aludes

Purcells

Mar 5 – 6, 2015Avalanche Canada
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Archivado · caducó 12 years ago

Peligro de aludes

Sat
Sun
Alta montaña
1 · Débil
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil

Lo esencial

There may be another light dusting of snow, with small wind slabs forming, but really there is little change to speak of.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Fresh touchy wind slabs may be lurking in a variety of places. Although not expected to be large, they could take you for a ride.

Confidence

Good - The weather pattern is stable

Weather Forecast

Friday: A mix of sun and cloud with a slight chance of flurries. The freezing level is around 1800-2000 m and ridge winds are light or moderate from the W. Saturday: A mix of sun and cloud. The freezing level remains near 1800 m and winds ease to light. Sunday: Mainly sunny. The freezing level jumps to a little over 2000 m and wind could rise to moderate SW by the end of the day.

Avalanche Summary

Recent reports include several dry loose sluffs in steep terrain, and thin soft wind slabs reacting to slope cuts with minimal propagation. Explosive testing also resulted in one cornice fall that did not trigger a slab on the slope below.

Snowpack Summary

Roughly 5-10 cm of recent storm snow adds to the variable amounts of dry facetted snow on top of the mid-February crust with associated buried surface hoar in sheltered areas, or more recent melt-freeze crusts on sun-exposed slopes. The late-Jan crust/surface hoar layer can be found about a metre below the surface in deeper snowpack areas. The mid-January surface hoar, can be found below that. These layers have gained significant strength, and chances of triggering these weaknesses have decreased dramatically. However, triggering may be possible with a large input such as cornice fall, or an avalanche stepping down, especially on slopes that see a lot of sun.

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