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Avalanche Forecast

Archived

Feb 2nd, 2026–Feb 3rd, 2026

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

Regions

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

A slab has formed over a weak layer in the upper snowpack. You can easily identify and assess this problem by digging down and watching for signs like cracking, whumphing, and recent avalanches.

Use the bulletin as a trip planning tool, then adjust your day based on field observations.

Confidence

Avalanche Summary

No new avalanches reported on Monday, but...

The MIN lit up late Saturday evening as people returned from their trips and reported multiple avalanche involvements up to size 2, all running 10-25 cm deep on the surface hoar/crust layer.

Mt Field, Boom Lake, Mt Whymper and the Tophat areas all saw action.

Snowpack Summary

10 - 20 cm of snow from last week now overlies the January 24 surface hoar weak layer. In places, this surface hoar has formed on a crust, providing a very planar surface for failure. As new snow, wind, and warm temperatures continue to build an overlying slab, this weak layer is becoming increasingly problematic. As a result, this weak layer poses a growing avalanche concern.

Weather Summary

A mix of sun and clouds is expected Tuesday and Wednesday, with only a trace of precipitation expected. Temperatures will remain seasonably warm, with freezing levels around 2000 m. Ridgetop wind speeds are expected to remain elevated over the next few days. Later in the week, a ridge of high pressure will build in, bringing clearer skies.

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the old surface.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.