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Avalanche Forecast

Archived

Feb 25th, 2026–Feb 28th, 2026

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

Regions

Waterton Lakes, Waterton.

New snow and strong winds will build reactive wind slabs and grow cornices. Stay clear of wind-loaded slopes and keep in mind that large avalanches may reach lower elevations from above.

Confidence

Moderate

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

Avalanche Summary

A few cornice triggered slab avalanches to size 2.5 were observed on Tuesday. While most were likely wind slabs, there is uncertainty to whether some could have run on buried persistent weak layers.

Snowpack Summary

Upper snowpack: Another 15 cm will fall with strong SW winds on top of 20 cm that fell early this week. This will continue to build wind slabs on lee slopes. It sits over a crust on solar slopes at and below treeline.

Mid snowpack: 30-50 cm of settling snow from last week's storms sits over a series of melt freeze crusts and faceted layers on polar aspects and on a thick crust on solar slopes.

Lower snowpack: is well settled.

Weather Summary

Thursday

Isolated flurries with up to 6 cm of snow. Low of -6 °C, High of -4 °C. SW wind gusting to 70 km/h. Freezing level of 1700 m.

Friday

Flurries up to 10 cm. Low of -5 °C, High of -4 °C. Wind SW gusting to 65 km/h. Freezing level of 1700 m.

Saturday

Isolated flurries. Up to 5 cm during the AM. Low of -6 °C, High of -2 °C. SW wind gusting to 50 km/h. Freezing level of 1900 m.

Current weather forecast: Mountain Weather Forecast

Terrain and Travel Advice

  • Approach lee and cross-loaded slopes with caution.
  • If triggered, wind slabs may step down to deeper layers, causing larger avalanches.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.