Avalanche forecast

Jasper

Feb 11 – 12, 2020Parks Canada
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Archived · expired 7 years ago

Avalanche danger

Wed
Thu
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
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Highlights

Southern aspects getting a mix of strong winds and solar punch making conditions challenging.

Looks for sheltered north aspects for good, dry snow.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–3

    Wind slabs are prevalent through the forecast region. Their sensitivity will vary particularly with local loading and wind patterns.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely
    Size
    1.5–3

    Shallow snowpack zones and/or large triggers such as cornice failures could trigger this deep layer. The consequences would be severe!

Weather Forecast

A re-shuffling of weather systems to remain offshore and so, for the near future should leave us with fairly benign weather conditions to the region over the next couple of days. Alpine wind speeds expected to abate to light values for Tuesday and Wednesday. 

See Weather synopsis here: Avalanche Canada Mountain Weather Forecast

Snowpack Summary

SW winds have created deep pockets of windslab and pronounced cornice development on North aspects. Mixed slab character, support and sensitivity in the mid-pack is bridging the deeper basal facets and depth hoar. Average HS at treeline: ~160cm.

Avalanche Summary

Previous large avalanches observed on Northerly aspects and triggered by large loads (like cornices).

Confidence

Regions covered