Avalanche forecast

Jasper

Dec 1 – 2, 2011Parks Canada
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Archived · expired 15 years ago

Avalanche danger

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

Forecasted extreme winds in the high alpine will increase wind slab development.

Avalanche problems

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    2–3
    Steep cross or lee winded slopes with steep convex roles are likely slab trigger zones. In the alpine the snowpack depth is highly variable. At treeline travel is good and the snowpack supportive.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    2–3
    The deep persistent slab can be triggered most easily where the snowpack is less than 100cm and wind stiffened. Snow depths are highly variable in the alpine. At and below 1,600m a 5cm rain crust down 15cm is adding increased stability.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Due to the number and quality of field observations

Regions covered