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Avalanche Forecast

Archived

Nov 5th, 2025–Nov 6th, 2025

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Early Season
Below Treeline
Early Season
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Early Season
Below Treeline
Early Season
Alpine
Natural avalanches unlikely, human triggered possible.
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.

Moderate to strong winds forecasted for Thursday will create fresh slabs in the alpine. Areas of main concern are gully features and steep lee slopes. Ice climbers should pay attention to local wind conditions. Up to date weather station observations can be obtained from Avalanche Canada's website.

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

Last weekends storm produced 25-30 cm of new snow along the continental divide, with settled snowpack depths now around 40-60 cm at treeline. Strong forecasted SW winds for Thursday will create fresh windslabs in lee alpine areas and cross-loaded features.

Weather Summary

Thursday and Friday bring unsettled weather along the divide with accumulations up to 10 cm by end of day on Friday. Saturday will be sunny and clear with arrival of a high pressure system.

Winds will be in the 40-50 km range from the SW.

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.