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Archived

Avalanche Forecast

Mar 20th, 2025–Mar 21st, 2025
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: East Kakwa, Kakwa, McGregor, North Rockies, Pine Pass, Renshaw, Sugarbowl, Tumbler.

Use caution as you transfer into wind-affected terrain.

Human-triggered avalanches are possible.

Confidence

Moderate

Avalanche Summary

Three natural wind slab avalanches were reported on Wednesday. One large (size 2) and two were triggered by cornice failures. One size 2 and one small (size 1) naturally triggered wind slabs were reported on Tuesday.

Snowpack Summary

30 to 60 cm overlies a hard melt-freeze crust and surface hoar crystals in some wind-sheltered treeline terrain.

Variable winds have created windslabs on all aspects near or just below ridge crests in the alpine and treeline elevations.

A weak layer of surface hoar and/or faceted grains buried mid-February is around 50 to 100 cm deep. This layer seems to be gaining strength.

The lower snowpack is well-settled.

Weather Summary

Thursday night

Cloudy with 0 to 5 cm of snow. 20 to 40 km/h south ridgetop wind. Treeline temperature -4 °C.

Friday

Cloudy with 0 to 5 cm of snow. 20 to 40 km/h southwest ridgetop winds. Treeline temperature -5 °C. Freezing level 1300 m.

Saturday

Mix of sun and cloud with 0 to 5 cm of snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1300 m.

Sunday

Cloudy with 5 to 10 cm of snow. 40 to 60 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Expect slab conditions to change drastically as you move into wind-exposed terrain.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.

Avalanche Problems

Wind Slabs

Newly formed wind slabs could be reactive to human triggers.

Aspects: North, North East, East, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2