Avalanche forecast

Banff Yoho Kootenay

Apr 11 – 12, 2012Parks Canada
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Archived · expired 14 years ago

Avalanche danger

Fri
Sat
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
3 · Considerable
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Highlights

Temps will remain at or above 0 at valley bottom tomorrow with the possibility of rain. Up to 25cm of snow is expected at high elevations starting tomorrow midday. The danger rating will rise until the new snow has a chance to settle.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2–3
    Up to 30cm of new snow and accompanying wind will create fresh windslabs at higher elevations by Friday. These windslabs will likely settle quickly, due to the warm temperatures. The layer will be most active just after the storm.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    Currently the warm temps encourage the potential for loose and wet avalanches. As the temps cool off to below 0, the danger of loose wet avalanches decreases significantly. Pay attention to temps at your location and anticipate temps far above you.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–3
    The Feb 12 surface hoar is still causing isolated slides. Areas of most concern is terrain with a weak, shallow and rocky snow-pack. In deeper snow-pack areas these layers are not as reactive. Large triggers like cornices may trigger this layer.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Forecast snowfall amounts are uncertain on Thursday

Regions covered