Boletín de aludes

South Coast

Mar 17 – 18, 2015Avalanche Canada
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Archivado · caducó 12 years ago

Peligro de aludes

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

Winds have created a variable snowpack. Be alert to conditions that change with aspect and elevation.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–4
    Touchy wind slabs have formed on many slopes. Cornices may be fragile and could break off further back from the edge than expected. Wind slabs could fail on a buried crust, creating surprisingly large avalanches.

Confidence

Fair - Intensity of incoming weather systems is uncertain

Weather Forecast

Generally light precipitation is expected on Wednesday, with the freezing level around 1700 m and winds light to moderate from the S to SW. Moderate snow is expected on Thursday and Friday (5-10 cm /day) above about 1800 m (rain at lower elevations). Winds are moderate to strong from the S to SW.

Avalanche Summary

A cycle of wind slabs and storm slabs (most size 1, up to size 2) was reported on Sunday and Monday. These failed naturally and were triggered remotely by skiers as well. Many were on north aspects. A snowmobiler also triggered an avalanche on Sunday (see https://bit.ly/19wEv36).

Snowpack Summary

Wind slabs and wind-affected surfaces are the main theme at the snow surface. Cornices may also be fragile. Older, buried wind slabs may be hard to spot. A crust/facet combo down 10-60 cm produces moderate, sudden results in snowpack tests. In the neighbouring Sea-to-Sky region, this layer has shown enough reactivity to call it a persistent slab problem. Maybe it is the same inland? Let us know. A second, deeper crust, marks the boundary with a lower snowpack that is reported to be generally well-settled and strong. Below treeline, the diminishing snowpack is trending isothermal (same temperature throughout).

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