Avalanche forecast

Banff Yoho Kootenay

Nov 24 – 25, 2015Parks Canada
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Avalanche danger

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

Another storm is crossing the region on Monday night and we expect another 10 cm at treeline. This will form fresh windslabs, but otherwise conditions should remain relatively good with a nice refresh of soft snow on the surface.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    Fresh snow from Mon night and Tues will be blown into windslabs in leeward areas. We do not expect this condition to become terribly widespread, and any avalanches should remain relatively small - but watch out for tender windslabs on Tuesday.

Weather Forecast

Moist Pacific air traveling in a westerly flow aloft collides with cold, arctic air descending from the north. Models are indicating 10 cm at treeline for most areas in the Rockies, with winds shifting to north starting Monday night. Expect strong, gusty winds and blizzard like conditions as the cold front passes through. Clear skies by Tues night.

Snowpack Summary

5-10 cm of storm snow from Monday evening overlies widespread wind effected terrain above treeline, and a soft well settled snowpack below treeline. Expect the new snow to be blown into fresh windslabs in isolated leeward areas, typically 20-30 cm thick and they may trigger easily on Wednesday immediately following the storm.

Avalanche Summary

No new avalanches were reported or observed on Monday.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Tuesday

Regions covered