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Avalanche Forecast

Archived

Mar 11th, 2026–Mar 14th, 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.

New snow continues into the weekend, and winds are forecasted to increase.

Wind slabs will continue to form throughout the stormy days ahead. Use caution in wind loaded features as rider triggered wind slabs are likely.

Confidence

Moderate

  • We are uncertain due to the timing, track, and intensity of the incoming weather system.

Avalanche Summary

Earlier this week, several size 1 dry loose avalanches were observed in steep, sheltered alpine features. As well, a few wind slab avalanches to size 2 were observed in treeline and below treeline features.

Snowpack Summary

Up to 55cm of new snow is being redistributed into wind slabs in lee features. This sits over variable surfaces in the alpine and a new 3-8cm thick crust treeline and below treeline. Beneath this, 30–50 cm of settled snow overlies crusts and facets which is moist at lower below treeline elevations. The lower snowpack is generally well settled.

Weather Summary

Thursday

Flurries. Up to 9 cm of snow. Low of -5 °C. High of 0 °C. Wind gusting to 100 km/h. Freezing level at 2100 metres.

Friday

Isolated flurries. Low of -7 °C. High of -3 °C. Wind gusting to 60 km/h. Freezing level at 1400 metres.

Saturday

Periods of snow with totaling 15 cm. Low of -15 °C. High of -3 °C. Winds gusting to 60 km/h. Freezing level at valley bottom.

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 start small, but they can grow and push you into dangerous 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.