Avalanche forecast

Banff Yoho Kootenay

Dec 31, 2011 – Jan 1, 2012Parks Canada
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Archived · expired 15 years ago

Avalanche danger

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

Avalanche control planned for Mt. Bosworth, Stephen and Field tomorrow mid-day. Please no recreation of any sort on these peaks tomorrow. LP

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–3
    Since Dec 24, storm snow amounts total 40 cm (Lake Louise), 55 (Sunshine) , 60 (Bow Summit). SW winds have created touchy slabs 60-150 cm thick. Natural avalanches continue with on-going wind loading. Winds will taper and skies will clear tomorrow.

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    The December 10 surface hoar is down approximately 60-70 cm. The distribution of this layer is spotty but mostly on the west side of the Divide (Mt. Whymper, Takakaw Falls). Avoid steep walled gully features, or steeper open slopes.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    2–3
    Large windslab releases continue to step down into the basal weak facets creating large avalanches. Size 3 Natural over Sacre Blue climb on Rundle today, photos on the mountain conditions report.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Regions covered