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Avalanche Forecast

Archived

Apr 5th, 2026–Apr 6th, 2026

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

Higher freezing levels and potential sun on Monday may increase avalanche danger as the day progresses. Start and end early, and monitor how conditions are changing in your specific area.

The danger rating reflects the highest hazard expected during the day.

Confidence

Avalanche Summary

Sunshine ski hill observed a size 2 wet loose that triggered a wind slab in the alpine. Also, they triggered a few small wind slabs with explosive control, along with a couple of small wet loose avalanches later in the day. No other avalanches observed.

Snowpack Summary

Moist snow was observed to 2000m on Sunday. Lingering wind slabs persist in the alpine. Sun crusts on solar aspects up to ridgeline. Shady aspects hold dry settled snow above 2100 m. The March 20th rain crust is 10 to 50cm deep and extends up to 2100-2300m. or higher. The Jan 24th persistent weak layer of facets and crust is down 70-160+ cm and becoming non-reactive. Below this, the snowpack is solid with no significant weaknesses.

Weather Summary

Monday: L-M SW winds, freezing levels up to 2600m and no snow. A mix of sun and cloud.

Tuesday: 5-10cm, depending on the location, with increased NW winds and valley-bottom freezing levels all day (-3 dropping to -8 over the day at treeline)

Wednesday: Light NW winds, freezing levels to 1800m, and a trace of snow.

Terrain and Travel Advice

  • Cornice failures could trigger large and destructive avalanches.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.