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Archived

Avalanche Forecast

Mar 26th, 2025–Mar 27th, 2025
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Akamina, Bull, Crowsnest North, Crowsnest South, Elkford East, Elkford West, South Rockies.

Natural avalanche activity is expected to continue while temperatures and freezing levels remain elevated. Travel in avalanche terrain is not recommended

Confidence

Moderate

Avalanche Summary

On Wednesday, numerous natural wet loose avalanches were observed to size 2.

Large natural persistent slab avalanches have run on buried weak layers in recent days. A size 2.5 was observed near Castle on Monday, and the Field Team reported a size 2.5 in the Crowsnest area on Wednesday.

Snowpack Summary

Limited overnight refreeze will keep surfaces moist to wet until freezing levels drop throughout the day.

Where still intact, a melt-freeze crust is found 20 to 40 cm deep, except on high-elevation north and east-facing slopes.

A persistent weak layer of surface hoar or facets from late January is buried 70 to 120 cm deep. It is most likely to be triggered on steep, rocky, convex slopes on northerly and easterly aspects at treeline and above.

Weather Summary

Wednesday Night

Partly cloudy with scattered showers. 10 to 20 km/h south ridgetop wind. Treeline temperature +2 °C. Freezing level 2500 m.

Thursday

Mostly cloudy with scattered showers. 20 to 30 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level falling to 2000 m.

Friday

Mostly cloudy with scattered flurries, 5 to 7 cm. 10 to 20 km/h variable ridgetop wind. Treeline temperature -2 °C. Freezing level 1000 to 2000 m.

Saturday

Mostly cloudy with isolated flurries, 1 to 2 cm. 10 to 20 km/h southwest ridgetop wind. Treeline temperature - 4 °C. Freezing level 1000 to 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large avalanches due to buried weak layers.
  • The likelihood of deep persistent slab avalanches will increase with each day of warm weather.
  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.
  • Only the most simple non-avalanche terrain with no overhead hazard is appropriate at this time.

Avalanche Problems

Persistent Slabs

A persistent weak layer of surface hoar or facets is buried 70 to 120 cm deep. This layer will remain reactive with warm temperatures and high freezing levels.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 3

Cornices

Cornices are becoming weak with warm temperatures and sun. A large cornice fall can be dangerous on its own, and can also trigger deep slabs on slopes below.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1.5 - 3