Avalanche forecast

Banff Yoho Kootenay

Nov 26 – 27, 2011Parks Canada
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Avalanche danger

Sat
Sun
Alpine
4 · High
Treeline
4 · High
Below
3 · Considerable
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Highlights

Unusually dangerous avalanche conditions exist. Another storm Saturday through Sunday may produce 30+ cm of snow with strong Westerly winds, further deteriorating conditions. Backcountry travel in avalanche terrain is not advised this weekend. SH

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Very Likely
    Size
    2–3
    As new snow accumulates this weekend, expect rapid wind slab formation, which will continue to overload the basal facets, increasing natural activity and the potential for human triggered avalanches.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Very Likely
    Size
    2–3
    Up to 45cm of snow deposited last Wed. formed wind slabs 60-100cm deep. This has overloaded the weak basal depth hoar and facets. Lake Louise and Sunshine ski areas reported widespread activity up to 2.5 today from explosive control, some 200m wide.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

on Saturday

Regions covered