Avalanche forecast

Jasper

Dec 10 – 11, 2011Parks Canada
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Archived · expired 15 years ago

Avalanche danger

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

The thin wind slabs created by previous northerly winds are becoming more reactive especially on cross-loaded SW gulleys and bowls at treeline and above. Avoid being on or under terrain with these features.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    Thin cross-loaded slopes at tree line and above are becoming more reactive. Several natural avalanches to size 2 were observed on these features with today's rise in temperatures.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    2–3
    These slabs are sitting over a weak basal facet layer. Most large avalanches that have been observed recently have been on this layer. The layer is most easily triggered from shallow areas especially along the edge of fatter slopes.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

on Saturday

Regions covered