Avalanche forecast

Banff Yoho Kootenay

Jan 30 – 31, 2012Parks Canada
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Archived · expired 15 years ago

Avalanche danger

Mon
Tue
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Highlights

E

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    2–3
    Recent control in Yoho & field obs in Kootenay confirm the Jan 20 facet interface still active. 70-100 m sits over this layer. If a skier or cornice failure triggered a storm slab, it could step down to the facet interface & become a larger slide.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2–3
    This layer is of concern in thinner snowpack areas. In Kootenay yesterday, a skier triggered a 60 cm thick size 1.5 slab, propagated 50 m on a 35 deg, open wind affected slope. Skier was carried 150 m and lost their pole - thx for the report!

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    2–3
    Storm snow amounts vary from 35 cm West side of the Wapta, 20-25 - Sunshine, 20 - Lake Louise, and 15 - Bow Summit. Moderate to strong west winds has created reactive touchy slabs. Expect sizable sluffs off cliffs with ongoing strong winds tomorrow.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the number of field observations

Regions covered