Avalanche forecast

Banff Yoho Kootenay

Feb 1 – 2, 2019Parks Canada
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Avalanche danger

Sat
Sun
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
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Highlights

Friday marks a change in conditions with an incoming storm. Pay attention to new snowfall amounts and what the wind is doing.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5
    Fresh wind slabs are expected from forecasted snow and winds on Friday.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely
    Size
    1–3
    A well settled mid-pack sits over top of a deep persistent facet layer (Dec 10 layer). Stability tests show moderate to hard results within this facet layer.

Weather Forecast

Snow beginning on Friday with various models forecasting between 10 and 20 cm along the divide by the end of the day. More snow on Saturday (up to 30 cm) and then very cold arctic air settles in for Sunday. Winds forecast to be mod to strong from the SW on Friday.

Snowpack Summary

Extensive wind effect in alpine from last weeks strong winds. The mid-pack is increasingly settled (up to P) down to the Dec 10 interface (down 60-130 cm). In shallower snowpack areas weak facets exist below the Dec 10 interface, and stability tests show moderate-hard results within the facets.

Avalanche Summary

No new avalanche activity

Confidence

Intensity of incoming weather systems is uncertain on Friday

Regions covered