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Avalanche Forecast

Archived

Mar 13th, 2026–Mar 14th, 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 unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Crowsnest North, Crowsnest South.

Triggering large storm slabs is most likely in wind affected terrain.

Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Confidence

Moderate

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

Avalanche Summary

On Thursday, several naturally triggered storm slabs up to size 2 were reported on a variety of aspects at treeline and above.

Snowpack Summary

15 to 35 cm of recent snow and strong southwest winds have formed storm slabs that will be most reactive in wind-affected terrain.

The recent snow sits on a 3 to 10 cm thick crust on all aspects. The thickness of the crust depends on elevation.

A persistent weak layer of surface hoar and/or crust is down 30 to 50 cm. Avalanches are unlikely on this layer in areas where a supportive crust exists below the recent snow.

In shallow snowpack areas, depth hoar (large facets) can be found near the bottom of the snowpack.

Weather Summary

Friday Night
Mostly cloudy. 30 km/h west ridgetop wind. Treeline temperature -9 °C.

Saturday
Mostly cloudy. 0 to 5 cm of snow. 20 km/h north ridgetop wind. Treeline temperature -14 °C.

Sunday
Sunny. 20 km/h northwest ridgetop wind. Treeline temperature -14 °C.

Monday
Mostly cloudy. 70 km/h west ridgetop wind. Treeline temperature 0 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Use small, low consequence slopes to test the bond of the new snow.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Expect slab conditions to change drastically as you move into wind-exposed terrain.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.