Avalanche forecast

Jasper

Feb 18 – 19, 2018Parks Canada
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Archived · expired 9 years ago

Avalanche danger

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

Persistent weaknesses are present and active in the northern bulletin region, like the slack-country off Marmot Basin Ski Hill, Portal Creek, and the Tonquin.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2
    Variable direction, strong upper elevation winds are continuing to create fresh windslabs and stiffen the snow surface well into Treeline locations.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–3
    Whumpfing and cracking are signs of this layer's reactivity. Expect long propagation with a wind-stiffened snow surface.

Snowpack Summary

Available snow has been redistributed by strong, variable direction winds. At all elevations, where transported, new wind slabs will be sensitive to triggering. A persistent slab, down 50 to 80cm, is prevalent through the forecast region. Any large TL avalanche terrain that has not obviously avalanched should be expertly managed or, avoided.

Avalanche Summary

No new avalanche activity observed or reported.

Confidence

Weather Forecast

Gusty North winds expected to persist overnight and through the day Sunday. Temperatures will continue to drop with overnight temperatures to -27, and Sunday's daytime high near -23 for the whole bulletin region.

Regions covered