Avalanche Forecast
Issued: Apr 5th, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
jpercival,
Avalanche Canada
Keep your guard up as you get into open, wind-affected terrain. Large natural and human-triggered wind slabs have occurred in the alpine in recent days.
Summary
Confidence
Moderate
Avalanche Summary
On Wednesday, operators in the region reported natural and remotely triggered wind slabs up to size 2.5 on north and west aspects in the alpine. These large remotely triggered avalanches are a strong indicator of an unstable snowpack!
Similar activity may continue and riders should continue to avoid wind-loaded areas in the alpine and treeline.
Snowpack Summary
At upper elevations, 10 to 40 cm of recent snowfall has been redeposited by strong winds. Below this, small facets have been found that overlie a hard crust. The hard crust is located on all aspects and at all elevations elevations, with the exception of north-facing slopes over 2000 m.
A layer of weak faceted snow above a crust formed in early February is now buried 50 to 120 cm deep. This layer is generally getting stronger and is shielded by crusts above it. It has not produced any recent avalanches.
Weather Summary
Friday Night
Cloudy with clear periods. Ridge wind 15 to 30 km/h from the southwest. Treeline temperatures drop to -6 °C. Freezing level drops to valley bottom.
Saturday
A mix of sun and cloud. Ridge wind light from the southwest. Treeline temperatures reach a high of 0 °C. Freezing level rises to 1800 m.
Sunday
A mix of sun and cloud with isolated flurries. Ridge wind 15 to 30 km/h from the southwest. Treeline temperatures reach a high of 0 °C. Freezing level rises to near 2000 m.
Monday
Mostly cloudy with light flurries. Ridge winds 20 to 40 km/h from the southwest. Treeline temperatures reach a high of 0 °C. Freezing level rises to near 2000 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Recent wind has varied in direction so watch for wind slabs on all aspects.
- Avoid areas where the snow feels stiff and/or slabby.
- Remote triggering is a concern, watch out for adjacent and overhead slopes.
Problems
Wind Slabs
Up to 40 cm of recent snowfall was accompanied by strong southwest winds forming reactive wind slabs in the alpine. Winds have shifted to the northeast and may form fresh wind slabs in an atypical, reverse-loading pattern.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 6th, 2024 4:00PM
