Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Mar 12th, 2024–Mar 13th, 2024
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
Alpine
4: High
The avalanche danger rating in the alpine will be high
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
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high

Regions: Coquihalla, Manning, Skagit.

Recent snow and wind have created dangerous avalanche conditions. Stick to smaller, low-angle slopes.

Confidence

Moderate

Avalanche Summary

Reports of avalanche activity have been limited. A notable size 2 persistent slab avalanche was observed in Manning Park (photo below). It likely occurred naturally over the weekend. A few small (size 1) storm and wind slab avalanches were observed over the weekend.

Snowpack Summary

Tuesday's storm brought 15 to 30 cm of snow, likely forming fresh slabs at upper elevations and wind-loaded terrain. This snow sits above a thin crust on south aspects and settling powder on north aspects.

There has been evidence of two persistent weak layers roughly 80 to 120 cm deep. The upper one is a thin layer of facets and crusts or surface hoar while the deeper one is facets above a thick crust. While we have not seen many reports of persistent slab avalanches in this region, these layers should not be trusted based on notable activity in neighbouring regions.

Weather Summary

Tuesday Night

Cloudy. 30 km/h west ridgetop wind. Treeline temperature -6 °C.

Wednesday

Cloudy. 20 km/h northwest ridgetop wind. Treeline temperature -4 °C with freezing level rising to 1200 m.

Thursday

Mostly sunny. 35 km/h northwest ridgetop wind. Treeline temperature +2°C with freezing level climbing to 3000 m.

Friday

Mostly sunny. 10 km/h northeast ridgetop wind. Treeline temperature +8 °C with freezing level climbing to 3300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Storm snow and wind is forming touchy slabs. Use caution in lee areas in the alpine and treeline.
  • Carefully monitor the bond between the new snow and old surface.
  • In times of uncertainty conservative terrain choices are our best defense.

Avalanche Problems

Storm Slabs

Fresh snow from Tuesday has left slabs that will likely be reactive in steep terrain, especially on wind-loaded slopes.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Persistent Slabs

Buried weak layers are most concerning at treeline elevations. Small slab avalanches may step down to this layer resulting in large, destructive avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 2 - 3