Avalanche forecast

Jasper

Nov 20 – 21, 2018Parks Canada
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Archived · expired 8 years ago

Avalanche danger

Wed
Thu
Alpine
2 · Moderate
Treeline
1 · Low
Below
No rating
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Highlights

Snowpack information for the high alpine is scarce, take a cautious approach and use a thorough assessment process if you venture into this terrain.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2
    Windslabs linger on NE to S alpine lee features. Most Westerly aspects are stripped bare from previous transport.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1.5–2.5
    Assume all skiable slopes have this crust, and assess the strength of the interface before jumping into any committing lines.

Weather Forecast

The current ridge of high pressure will hold until Wednesday, giving mostly clear skies and light ridge winds.  Treeline temperatures will fluctuate between -8 and 0. Click here for the Avalanche Canada mountain weather forecast.

Snowpack Summary

Winds have scoured W ridges to bare rock in many places. Windslabs can be found on NE through S, lee aspects. The Oct 25 crust is 2-4cm thick and down 60 to 80cm. Hard sudden collapse failures have been observed immediately below this crust in test profiles. Early season hazards lurking beneath the shallow snowpack remain a concern.

Avalanche Summary

Dry loose snow avalanches up to size 2 were observed recently from steep solar terrain in the alpine.

Confidence

Due to the number of field observations

Regions covered