Avalanche forecast

Banff Yoho Kootenay

Nov 25 – 26, 2011Parks Canada
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Avalanche danger

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

A widespread avalanche cycle has been caused by the recent storm overloading the basal depth hoar. Another storm Friday will keep the danger HIGH.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Very Likely
    Size
    2–3
    Strong westerly winds with the storm have created thick soft to hard wind slabs in all open areas that are easily collapsing on the basal depth hoar and increasing the propagation width of the resulting avalanches.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Very Likely
    Size
    2–3
    A 40mm storm with strong winds has doubled to tripled the total season snowpack over the last 36 hrs. Natural and human triggered avalanches up to size three are occurring throughout the forecast area failing on the basal depth hoar.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Regions covered