Avalanche forecast

Banff Yoho Kootenay

Nov 20 – 21, 2025Avalanche Canada
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Avalanche danger

Sat
Sun
Alpine
2 · Moderate
Treeline
1 · Low
Below
Early season

Highlights

Watch for fresh windslab development on Thursday as SW winds increase through the day, redistributing the 5 -15 cm of recent snow

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5

    5 - 15 cm of recent snow is available for transport into fresh windslabs, as the wind increases on Thursday. Look for isolated small windslab development in the lees of features in the alpine.

Confidence

Moderate

Avalanche Summary

No new natural avalanches observed or reported on Wednesday.

Snowpack Summary

Limited early-season observations indicate a generally well-settled Rockies snowpack with no significant weak layers. Last week's wet snow and rain left a rain crust (Nov 13) to 2300 m. In the short term, this adds stability to the snowpack and with 5-10 cm of dry snow on top, only isolated windslabs have been reported along with good early-season travel conditions. Treeline snow depths range from 40-70 cm.

Weather Summary

SW winds are forecasted to increase through Thursday and be strong to extreme on Friday. Alpine highs for Thursday will be around -5C with increasing cloud.

Terrain and Travel Advice

  • Pay attention to the wind; once it starts to blow, sensitive wind slabs are likely to form.

Regions covered