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Avalanche Forecast

Archived

Mar 9th, 2026–Mar 12th, 2026

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

Regions

Waterton Lakes, Waterton.

UPDATE: 40 cm of snow has fallen across the park and has increased avalanche danger ratings.

Snow continues to fall. Newly formed wind slabs will be the primary concern with the forecasted stormy days ahead. Use caution in wind loaded features.

Confidence

Moderate

  • We are uncertain due to a limited number of field observations.

Avalanche Summary

Numerous size 1 dry loose avalanches were observed in steep features, and a few windslab avalanches to size 2 were observed Monday morning.

Snowpack Summary

40 cm of new snow is being redistributed into wind slabs in lee features. This sits over older wind slab in the alpine and over a new crust treeline and below treeline. Beneath this, 30–50 cm of settled snow overlies crusts and facets which is all moist treeline and below treeline. This moist snow is starting to refreeze due to colder temperatures. The lower snowpack is generally well settled.

Weather Summary

Monday

Isolated flurries up to 5 cm. High of -8 °C. Low of -11. Wind gusting to 50 km/hr

Tuesday

Scattered flurries up to 4 cm. High of -10 °C. Low of -13 °C. Wind gusting to 40 km/h.

Wednesday

Flurries, up to 11 cm. High of -4 °C. Low of -11 °C. Wind gusting to 65 km/h. Freezing level at 1400 m.

Current weather forecast: Mountain Weather Forecast

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Loose avalanches may step down to deeper layers, resulting in larger avalanches.

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.