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Avalanche Forecast

Archived

Nov 25th, 2025–Nov 26th, 2025

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

Winds are picking up—Watch for fresh wind slabs and loading on lee slopes as you travel through exposed terrain

Thanks to all the MIN posters for the information - keep it coming!

Confidence

Moderate

Avalanche Summary

A few small natural avalanches up to size 1 were observed on Tuesday in steep alpine terrain. These new slabs appeared to be freshly formed wind slabs failing on a mid-storm interface.

Snowpack Summary

20-50 cms of settling storm snow overlays a variety of surfaces and appears to be bonding for now. The lower snowpack is generally well-settled with no significant weak layers; however, a rain crust does exist below ~2300 m. Overall, early-season travel conditions are good at higher elevations, with treeline snow depths of 70–100 cm.

Weather Summary

Unsettled weather is expected through Friday, with only a trace of snow accumulation. Winds will be slightly elevated—reaching the moderate range at ridgecrest on Wednesday—before dropping back to light for the remainder of the week. Temperatures will remain seasonal (below freezing) before falling to around –20°C over the weekend.

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

Terrain and Travel Advice

  • Be careful with sluffing in steep terrain, especially above cliffs and terrain traps.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep 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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.