Avalanche forecast

Northwest Coastal

Apr 8 – 9, 2017Avalanche Canada
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Archived · expired 9 years ago

Avalanche danger

Mon
Tue
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
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Highlights

Cornices remain the primary concern. Solar radiation is a common cornice trigger. Limit your exposure when it's cloudy and completely avoid cornices when it's sunny.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    New snow and moderate southerly winds may have formed thin wind slabs in lee features below ridgetops on Saturday.

  • Cornices

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2–3
    Large cornices may become weak with daytime warming and have potential to trigger slabs on the slopes below.

Confidence

High -

Weather Forecast

SUNDAY: Mix of sun and cloud isolated flurries. Light southerly ridgetop winds. Freezing level around 1400 m.MONDAY: Mix of sun and cloud. Light southeasterly ridgetop winds. Freezing level around 1500 m.TUESDAY: Mix of sun and cloud. Light southeasterly ridgetop winds. Freezing level around 1500 m.

Avalanche Summary

No new avalanches were reported on Friday in this region.

Snowpack Summary

10-15 cm of new snow on Saturday with light to moderate southerly winds may have created small wind slabs on lee features below ridgetops. The new snow will likely be sitting on hard surfaces created by strong winds earlier in the week. A weak layer of facets and crusts are buried 100-150 cm down. The layer has been unreactive recently, but rapid warming of the snowpack or a large trigger, such as a cornice, may still have the potential to trigger it.

Regions covered