Boletín de aludes

Purcells

Feb 10 – 11, 2012Avalanche Canada
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Archivado · caducó 15 years ago

Peligro de aludes

Sun
Mon
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Problemas de aludes

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–6
    Watch for tender cornices at ridge tops. They may be destructive by themselves, and have potential to trigger large avalanches on the slope below.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    3–6
    Although a deep persistent slab would most likely require a large trigger, they're still possible; especially in thin snowpack areas or in unsupported, rocky terrain.

Confidence

Fair - Due to variable snowpack conditions

Weather Forecast

A firmly embedded ridge of high pressure over Alberta seems to be causing systems to fizzle once they reach the Columbia Mountains. Although there may be some sunny breaks on Saturday, conditions will be mostly cloudy for the forecast period with trace amounts of snowfall possible each day. Winds will be light and northwesterly with alpine temperatures trending from -7.0 on Saturday to -13.0 by Monday.

Avalanche Summary

No new avalanches to report.

Snowpack Summary

The snowpack is now generally well settled and riders are feeling increasingly confident in steeper terrain, particularly in areas with a deeper snowpack. Cooling has helped the snowpack to gain considerable strength since the warming last weekend and a crusts have now developed on slopes that saw direct sun. In the south of the region, it is thought that the January 13th surface hoar (buried about 40cm down) may still be reactive in isolated areas. Deep basal facets are widespread throughout the region. In most cases triggering is unlikely and would require a large trigger or a significant rise in temperature. Snowpack depths at 2000m sit at about 2m deep. If you're traveling around the mountains, it's a good time to take stock of current surface conditions (surface hoar/ crusts/ facets) that will become an issue once buried.

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