Avalanche forecast

Jasper

Dec 19 – 20, 2011Parks Canada
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Archived · expired 15 years ago

Avalanche danger

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

With up to 35cm of storm snow in isolated locations, very little natural activity was noted and visibility was excellent. Don't be lulled into false sense of security as many slopes may be awaiting the human trigger.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–3
    Windslabs persist near exposed ridgetops and cross loaded gulleys.

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2
    Anywhere from 5-35cm of new snow fell Saturday evening. It appears to be bonding well as winds were light and temperatures warm when storm arrived. Winds are just now slabbing the storm snow.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–3
    Basal facet collapses are still being noted in test pits yet layers are bridging well above. Caution likely shallow snowpack trigger zones.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Regions covered