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Avalanche Forecast

Archived

Nov 13th, 2025–Nov 14th, 2025

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

Regions

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

Snow, wind, and warm temperatures can be expected through Friday. This will result in increased avalanche hazard. A cautious approach to terrain selection is required for the next few days until conditions settle.

Confidence

Moderate

Avalanche Summary

No avalanches reported on Thursday, but lots of wind drifting occurring with stiff slabs up to 50 cm deep reported on the Wapta.

Snowpack Summary

Up to 30 cm of storm snow accompanied by warm temperatures and strong SW winds will have created fresh windslabs in lee treeline and alpine features. Snow depth is 90-110cm in the alpine, and 40–70 cm at treeline, Early reports suggest that while the snowpack is generally thin, the midpack is settled and supports the weight of a skier.

Weather Summary

A moist Pacific system will bring up to 20-30 cm to the region through Friday morning. Bow Summit area is forecasted for higher amounts and lesser amounts to the south. Temperatures will cool down on Friday with freezing levels near 1500m and ridgetop temperatures around -10. Winds will remain in the mod to strong range from the SW.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs 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.

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.