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Avalanche Forecast

Archived

Nov 10th, 2025–Nov 11th, 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.

Watch out for building hazard due to sluffing in steep gullies and new windslab development.

Monitor local weather conditions at Avalanche Canada's website.

Confidence

Low

Avalanche Summary

No new avalanches observed or reported on Monday. On Saturday, 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.

Snowpack Summary

5–10 cm of storm snow on Sunday 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

Previous strong to extreme ridgetop winds are expected to ease early in the week. Unsettled weather will persist, with another round of precipitation forecast for Wednesday. Snow accumulation will be heaviest in the western part of the region, with up to 10 cm expected at higher elevations. Freezing levels over the next few days will range between 1,500 and 2,000 m.

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.