Avalanche forecast

Northwest Coastal

Nov 28 – 29, 2013Avalanche Canada
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Avalanche danger

Sat
Sun
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
1 · Low
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Highlights

Storm snow will add additional load to the shallow snow pack

Avalanche problems

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–4
    A layer @ 20cm from the surface as well as a crust layer 90 cm down may become reactive with the increased load from the new storm snow. In addition, forecast high winds accompanying the storm will produce wind slabs at tree line and in the alpine.

Weather Forecast

A series of Pacific lows with high winds will move through the area in the next few days. Although the timing is unclear from the models, by Saturday evening the area may have received up to 50mm of precipitation followed by an arctic outbreak for the beginning of the next week.

Avalanche Summary

No new avalanche activity has been reported to date. Expect wind slabs to develop during the storm. Additional loading may overload the weak layer 20 cm from the surface and/or the crust near the bottom of the snow pack.

Snowpack Summary

At the beginning of this storm cycle the snow pack was little more than a metre at 1000 M. elevation with two identifiable weak layers at 20cm and 90 cm from the surface. New snow will load the existing snow pack and may produce avalanche activity on these layers. Surface storm slabs are expected to develop during the storm cycle due to forecast high winds and new snow.

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