Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
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: Dogtooth, East Purcell, Purcells.

Dangerous avalanche conditions continue, with large, destructive natural avalanches remaining possible.

Confidence

Moderate

Avalanche Summary

Numerous natural, persistent, and deep persistent slab avalanche activity on Wednesday. Wet loose and wet slab activity was widespread throughout the region.

Snowpack Summary

A mix of 5 to 7 cm snow, moist surfaces, and thin, breakable crusts, depending on freezing levels and timing of incoming cooler temperatures and precipitation. Below lies a complex snowpack with several weak layers:

  • An interface from early March, 30 to 50 cm deep, consists of a crust on sunny slopes and lower elevations, and surface hoar or facets in sheltered, shaded upper elevations.

  • Persistent weak layers from February and January, including crusts, facets, and surface hoar, are buried 50 to 100 cm deep and remain a concern.

  • The bottom of the snowpack is composed of large facets, which are showing signs of becoming reactive again, with some very large avalanches recently failing on this layer.

Weather Summary

Wednesday Night

Cloudy, 5 to 7 cm snow, 10 to 20 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 2200 m.

Thursday

Mostly cloudy, mixed rain and snow, 3 to 5 cm. 20 to 30 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

Friday

Mostly cloudy with scattered flurries, 4 to 6 cm. 10 to 20 km/h southeast ridgetop wind. Treeline temperature -2 °C. Freezing level 1500 to 2000 m.

Saturday

Mostly cloudy, scattered flurries 3 to 5 cm. 10 to 15 km/h southwest wind. Treeline temperature 0 °C. Freezing level 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Cornice failures could trigger large and destructive avalanches.
  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.

Avalanche Problems

Persistent Slabs

Several buried weak layers exist throughout the snowpack. These layers will remain active as temperatures and freezing levels remain elevated.

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

Elevations: All elevations.

Likelihood: Likely

Expected Size: 2 - 3

Deep Persistent Slabs

There is evidence that weak layers near the bottom of the snowpack are starting to wake up. Avalanches on these layers will be large, destructive and may run full path.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 2.5 - 4