Avalanche forecast

Banff Yoho Kootenay

Apr 3 – 4, 2026Avalanche Canada
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Avalanche danger

Sun
Mon
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low

Highlights

Skiing conditions have been excellent on sheltered northerly aspects.

Cornices are big and will fall down at some point. This could be enough to trigger a larger avalanche.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2

    Snow and wind from last week formed wind slabs that may still linger in alpine terrain. We have had few reports of these lately but suspect there are still lingering pockets that may be reactive

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–3

    A facet/crust interface from Jan is buried 70–180 cm deep. We are still seeing some hard, sudden test results at upper elevations (>2300m) where the Mar 20th rain crust does not exist. Large triggers like cornice falls or surface avalanches may trigger this layer.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

Lake Louise ski hill reported triggering some thin wind slabs with explosives in the alpine, which could be thicker in uncontrolled, out of bounds terrain.

Otherwise no new avalanches observed or reported.

Snowpack Summary

A few cms of new snow sits on variable wind effected snow in alpine and treeline features. A surface crust exists on solar aspects and on polar aspects up to 2100 m.

On polar aspects, 10–50 cm of snow overlies the March 20th rain crust, below 2300–2100 m, with some moderate sudden planar results.

Cornices are large and we are seeing regular failures.

The Jan 24th facet layer is buried 70–180 cm at treeline and in the alpine, some tests still producing hard, sudden results

Weather Summary

An upper ridge brings mainly benign weather for the next few days.

Friday: night: Low -5 °C at treeline

Saturday: Cloudy. 40 km/h west ridgetop wind. Treeline temperature -4 °C.

Sunday: Mix of sun and cloud. 30 km/h west ridgetop wind. Treeline temperature -3 °C.

Monday: Mix of sun and cloud. 30 km/h southwest ridgetop wind. Treeline temperature 0 °C.

Terrain and Travel Advice

  • Cornice failures could trigger large and destructive avalanches.

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