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Avalanche Forecast

Archived

Nov 30th, 2025–Dec 1st, 2025

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

Regions

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

Watch for wind slab development locally on Monday. Increasing winds may start to move the 20–40cm of recent snow.

Great skiing up high, but expect early-season hazards down low.

Confidence

Moderate

Avalanche Summary

No avalanches reported in the backcountry today. Sunshine Ski Hill was getting small wind slabs (size 1) with explosives in Delerium Dive.

Snowpack Summary

20-40 cm of storm snow from last weekend is settling and bonding. Isolated thin wind slabs exist on high-alpine lee aspects. Below ~2300 m, a rain crust exists below the storm snow. The mid- and lower-snowpack is well settled where thicker, and facetting (getting weaker) where thin. Tree-line snow depths range from 70-125cm.

Weather Summary

Monday will see increased NW alpine winds (up to 50 km/h), a trace of new snow, and, at treeline, daytime highs of -9C.

Not much changes on Tuesday except for lighter winds.

Click here for Environment Canada links to weather tables for the region.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.

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.