Avalanche forecast

Banff Yoho Kootenay

Nov 22 – 23, 2011Parks Canada
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Avalanche danger

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

Rising temps, increasing wind, and accumulations of up to 20cm expected late on Tues. Danger rating will start to rise. Pay attention to local/immediate conditions that are out of character with forecast ie. high danger earlier than expected.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2
    Currently, layer is only at high elevation lee aspects. However, as the storm tracks through the forecast region, it will become loaded and more sensitive to triggering. Also watch for local accumulations and developing storm slabs late on Tues.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    The basal facets and depth hoar layer is between 30 and 50cm deep. Steep open features are to be treated with caution. This layer will be of particular concern when it is loaded with new snow starting Tuesday afternoon.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Intensity of incoming weather systems is uncertain on Wednesday

Regions covered