Avalanche forecast

Jasper

Dec 9 – 10, 2011Parks Canada
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Archived · expired 15 years ago

Avalanche danger

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

A temperature inversion is forecast for Friday. Temperatures may reach or exceed the freezing mark in the alpine. Ice climbers should consider this especially on routes with south facing overhead hazard, ie loaded snow slopes and/or pillows.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    This layer continues to settle and is becoming less of a concern. Steep cross loaded or lee slopes are likely trigger zones. Alpine snowpack depth remains highly variable. At treeline and below, travel is good.

  • 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

The weather pattern is stable on Friday

Regions covered