Avalanche Forecast
Regions: Coquihalla, Harrison-Fraser, Manning, Skagit.
A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.
Confidence
High
Avalanche Summary
Over the warm weekend, wet loose avalanches up to size 2 were observed. These type of avalanches have become unlikely as surfaces refreeze.
No persistent slab avalanche activity has been observed since over a week ago in the Manning area.
Snowpack Summary
Surfaces are crusty on all aspects and elevations. Below, 10 to 20 cm of snow is sandwiched between the surface and another crust.
A weak layer of facets and/or surface hoar is buried 50 to 120 cm deep. This layer has not produced avalanche activity for over a week but snowpack test results continued to show results in the Manning area.
A crust from December, buried 1 to 2 m deep, has been observed to be breaking down.
Weather Summary
Monday night
Partly cloudy. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -1°C. Freezing level 1000 m.
Tuesday
Mostly cloudy. 10 to 30 km/h south ridgetop wind. Treeline temperature 0°C. Freezing level 1500 m.
Wednesday
5 to 10 cm of snow overnight then clearing to a mix of sun and cloud. 10 to 30 km/h south ridgetop wind. Treeline temperature -1°C. Freezing level 1500 m.
Thursday
A mix of sun and cloud. 10 to 30 km/h northeast ridgetop wind. Treeline temperature 0°C. Freezing level 1700 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Triggering deep layers is more likely if the snow surface didn't freeze overnight.
- Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.
Avalanche Problems
Persistent Slabs
Over a week ago, large avalanches were observed on a buried weak layer. This layer continues to give results in snowpack tests, indicating a lingering possibility of triggering.
Aspects: North, North East, East, West, North West.
Elevations: Alpine, Treeline.
Likelihood: Possible
Expected Size: 2 - 3