Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Nov 11th, 2025–Nov 12th, 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 possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Early Season

Regions

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

There has been lots of wind combined with small amounts of new snow in the last week.

Watch out for reactive windslabs in steep alpine terrain.

Monitor local weather conditions at Avalanche Canada's website.

Confidence

Moderate

Avalanche Summary

No new avalanches observed or reported on Tuesday. 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 new snow over the last 3 days has been redistributed by strong to extreme winds 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

A slight reprieve from the windy conditions of the last few days on Wednesday with dry conditions and only moderate upper level SW winds. On Thursday, the winds start to pick up again into the strong to extreme range from the SW as a warm storm approaches from the coast. Expect 15-30 cm overnight Thursday and Friday with 2000-2500m freezing levels.

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.