Boletín de aludes

Banff Yoho Kootenay

Mar 14 – 15, 2013Parks Canada
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Archivado · caducó 14 years ago

Peligro de aludes

Sat
Sun
Alta montaña
4 · Fuerte
Límite del bosque
3 · Notable
Bajo el límite
3 · Notable
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Lo esencial

Cooler temp's will help bring the danger levels down, but it will take a few days for the new snow to stabilize at all elevations. Use conservative terrain choices.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely - Very Likely
    Tamaño
    1–3
    Strong W winds are developing wind slabs on lee aspects and will be sensitive to human triggering.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely - Very Likely
    Tamaño
    1–3
    40-60cm storm slabs are poorly bonded to older surfaces. Touchy conditions at all elevations.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–3
    Rain to 1900m has created unstable conditions below tree-line. Travel is not recommended until the temperatures cool down.

Weather Forecast

The snow will ease off tomorrow and we should see freezing levels drop to 1200m by the end of the day. Winds will also decrease to moderate from the west. We may even see broken, patchy clouds east of the Divide. Saturday may bring another disturbance, with convective cells bringing light snow, moderate gusty winds, and a further drop in temp's.

Snowpack Summary

Up to 50cm of storm snow has fallen in the last 2 days, with higher amounts observed west of the Divide and up Hwy 93N. Storm slabs have formed on the surface and are bonded poorly to the older surfaces. Below tree-line, the rain has saturated the surface layers and created very unstable conditions.

Avalanche Summary

Lots of natural activity observed today, especially below tree-line in Yoho. Numerous deep, wet slabs to size 3 were seen failing and running to the valley floor. A party of 3 skiers in the Lake Louise backcountry remotely triggered a size 2 slab avalanche from 100m away, 50-60cm deep, 40m wide, and running 200m.

Confidence

Due to the number of field observations

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