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Avalanche Forecast

Archived

Nov 8th, 2025–Nov 9th, 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.

Strong winds have eased but wind slabs remain in alpine lee areas. Expect further development of wind slabs on Sunday when windy conditions return.

Monitor local weather conditions at Avalanche Canada's website.

Confidence

Moderate

Avalanche Summary

Test firing of Mt Bosworth's remote avalanche control system (Gaz-Ex) produced two size 1.5 windslabs, both located on a South aspect at 2300m. Bombing at Lake Louise produced size 1 slabs in lee-loaded features. Sunshine Village ski cuts are producing shallow size 1 wind slabs at treeline in freshly loaded pockets.

Snowpack Summary

5–10 cm of storm snow has been redistributed into wind slabs in lee areas, especially in the alpine. Height of snow is 80-100cm in the alpine, 30–60 cm at treeline, and it tapers quickly below treeline. Early reports suggest that while the snowpack is generally thin, it supports the weight of a skier.

Weather Summary

Alpine temps are expected to climb to just above 0°C on Sunday, with the valleys reaching around +5°C. Skies will be partly mixed, but no precipitation is forecasted for Sunday. On Monday, expect up to ~5 cm of new snow with increasing cloud. Alpine winds will increase through the period, becoming strong from the west.

Western Canada weather maps

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • 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.