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Avalanche Forecast

Archived

Nov 12th, 2025–Nov 13th, 2025

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
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.

Precipitation is on the way. If snow arrives early or heavier than forecasted, avalanche danger will climb faster than indicated.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported today.

Snowpack Summary

Last weeks storm snow (~20cm) has settled. Recent warm temps have produced surface crusts at lower elevations (~2100m). Small wind slabs still exist in alpine lee and gully features due to recent strong wind. 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

Model guidance remains variable, but a storm parcel is expected to bring 10 to 35 cm of snow from Thursday into Friday, with higher amounts generally toward the northwest (Bow Summit) and lower totals to the southeast (Sunshine). Temps will stay warm through the event before dropping once precipitation ends. Winds will remain strong from the southwest throughout the period, prime conditions for slab formation.

Terrain and Travel Advice

  • Wind slabs are isolated, but may remain reactive.

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.