Avalanche forecast

Banff Yoho Kootenay

Nov 18 – 19, 2012Parks Canada
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Archived · expired 14 years ago

Avalanche danger

Sun
Mon
Alpine
2 · Moderate
Treeline
1 · Low
Below
No rating
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Highlights

The strength of the SW flow seems to ebb by the time it arrives in our region. As a result, expect little change unless we receive a good pulse of moisture on Monday.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    With the strong winds and snow forecasted, new soft slabs will begin forming on Sunday in alpine and treeline locations. These new slabs will initially be touchy. Currently, slabs that are found in lee features have been stubborn to move.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–3
    Deep slabs size 2-3 have been noted on isolated steep alpine slopes over the past week. Failure plane was at the bottom of the snow pack on firn or glacier ice. No new have been reported these last few days but are still possible in the high alpine.

Weather Forecast

Forecast models indicate the main pulse of moisture may pass further to the south of our region. Expect unsettled weather Sunday with a pulse of snow (15-20cm) Monday. Freezing levels will drop to valley bottom, winds will be strong from the SW

Snowpack Summary

The new snow that may fall on Sunday/Monday will be accompanied by strong SW winds. This will likely create touchy soft/hard slabs at alpine and treeline elevations, especially in lee features. Pay attention to the amount of snow that is falling, as well the ridge-top winds above you.

Avalanche Summary

No natural activity reported today.

Confidence

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

Regions covered