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Avalanche Forecast

Archived

Nov 4th, 2025–Nov 5th, 2025

Alpine
Early Season
Treeline
Early Season
Below Treeline
Early Season
Alpine
Early Season
Treeline
Early Season
Below Treeline
Early Season
Alpine
Early Season
Treeline
Early Season
Below Treeline
Early Season

Regions

Banff Yoho Kootenay, Little Yoho, Banff, East Side 93N, Kootenay, Lake Louise, LLSA, Sunshine, West Side 93N, Field.

Avalanche danger rose over the weekend in alpine areas, as 15-30 cm of storm snow was blown into windslabs by SW winds with gusts reaching 100 km/hr. Ice climbers and others seeking the deepest snow in gully areas could be surprised by a wind slab or a sluff. This condition should improve with stable weather on Tuesday and Wednesday.

Confidence

Low

Avalanche Summary

Minimal information is available right now, but we expect small windslabs isolated to leeward slopes and gully features (i.e., ice climbs) where the snow has accumulated.

Snowpack Summary

Weekend storm totals of 25-30 cm of new snow on the continental divide areas, with total snowpack depths of 40-60 cm at treeline. Strong winds through the storm have created windslabs in alpine areas that could be triggered but will stabilize through the week with the cool temperatures.

One report from a field team at Bow Summit described the snowpack as very shallow but supportive for travelling.

Weather Summary

Tues and Wed both show a mix of sun & clouds with cool temps, and light winds. Treeline overnight lows to -10°C and daytime highs near -4°C. No new snow is expected.

Banff National Park forecast

Yoho National Park forecast

Kootenay National Park forecast

Western Canada weather maps

Terrain and Travel Advice

  • Use ridges or ribs to avoid areas of wind-loaded snow.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.