Boletín de aludes

Banff Yoho Kootenay

Nov 25 – 26, 2014Parks Canada
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Archivado · caducó 12 years ago

Peligro de aludes

Tue
Wed
Alta montaña
1 · Débil
Límite del bosque
1 · Débil
Bajo el límite
Sin grado
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Lo esencial

The hazard in steep alpine gullies near the divide has increased to Moderate. Areas with less snow and wind remain Low. This is a good time to re familiarize yourself with the danger ratings and what types of avalanches are expected at each level.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    Isolated, small wind slabs have been triggered on the November rain crust in steep gullies or wind loaded features. These would be of consequence if they were triggered above a terrain trap, or if they pushed you off of a cliff or ice climb.

  • Loose Dry

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    Significant sluffing in steep alpine gullies has been observed over the last two days near the divide along the Icefields Parkway with sluffs reaching the tops of the run out zones. This will be less of a problem in areas with little recent snow.

Weather Forecast

Tuesday looks like a pretty nice day with a few flurries and light winds. The snow is expected to begin on Wednesday and continue through the next couple days with significant amounts being forecast along with moderate to strong SW winds. The avalanche hazard will quickly increase when this arrives.

Snowpack Summary

Below tree line there is not enough snow for avalanches. Above 1900m a buried rain crust that formed in early November lies 20-40cm above the ground. This along with surface hoar in some areas is being buried by light snow and will create a good sliding layer as the new snow accumulates. Some lee slopes near the divide have thin wind slabs.

Avalanche Summary

A few small skier triggered avalanches have been reported in the last several days. Most of the failure have been in steep wind loaded terrain. Large sluffs were observed today on steep NE aspects near the divide on the Icefields parkway. These were big enough to push a climber off of a cliff or into a terrain trap.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Wednesday

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