Avalanche forecast

Banff Yoho Kootenay

Nov 21 – 22, 2025Avalanche Canada
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Avalanche danger

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

Highlights

Watch for wind slab development in alpine areas on Friday as winds increase.

Avalanche problems

  • Wind Slabs

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

    Recent snowfall (5–15 cm) is available for wind transport. Strengthening winds on Friday will likely form small wind slabs on lee aspects in the alpine. These slabs may be consequential for climbers and skiers in very steep terrain.

Confidence

Moderate

Avalanche Summary

No new natural avalanches observed or reported on Wednesday.

Snowpack Summary

Limited early-season observations suggest a generally well-settled Rockies snowpack with no significant weak layers. Last week’s warm, wet weather produced a Nov 13 rain crust up to 2300 m. In the short term, this crust adds stability. 5–15 cm of dry snow lies at treeline and above, with (so far) little wind transport reported. Overall, early-season travel conditions are good, with treeline snow depths of 40–70 cm.

Weather Summary

No snow for Friday, but increasing SW winds (40-60 km/h in the alpine), freezing levels to 1700m, and treeline temperatures staying around -5C.

Click here for Environment Canada links to weather tables for the region.

Terrain and Travel Advice

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

Regions covered