Avalanche forecast

Banff Yoho Kootenay

Dec 8 – 9, 2011Parks Canada
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Avalanche danger

Thu
Fri
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Highlights

A temperature inversion is forecast for Thursday. Upper elevation temperatures may get close to zero degrees. Pay attention to alpine slopes that may be warming up.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    2–3
    Strong winds have been moving snow from the west and north for the last few days and hard wind slabs have formed. It is likely that any slab will immediately step down to the weak base. Choose moderate slope angles & low consequence terrain

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    2–3
    The weak base of depth hoar and facets is now less sensitive to human triggering , however skier triggered and natural avalanches have recently been observed on this layer. A natural with a 400 m crown was observed on Mt Lefroy today.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Regions covered