Avalanche Forecast
Issued: Apr 23rd, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs.
jsmith,
Avalanche Canada
Triggering large persistent slab avalanches may remain possible in specific alpine areas.
Avoid steep or convex slopes in the alpine where triggering slabs is more likely.
Summary
Confidence
Moderate
Avalanche Summary
No new avalanches were reported in this region on Monday.
Numerous slab avalanches up to size 2.5 were reported on a variety of aspects in the alpine on Saturday.
The slab avalanches likely failed on either a crust or a weak layer of surface hoar, depending on the aspect of the slope. Strong solar radiation often increases the likelihood of triggering both loose and slab avalanches. See MIN 1 and 2.
Snowpack Summary
A mix of wind affected and soft snow can be found in the alpine. Sunny aspects have a crust on the surface that may soften with daytime heating.
A few large slab avalanches were recently reported on a variety of aspects on steep alpine slopes. They likely failed on either a crust or a weak layer of surface hoar down 30 to 70 cm.
Cornices are large and looming at this time of year.
Weather Summary
Tuesday night
Mostly cloudy with isolated flurries, 0 to 5 cm snow. 5 to 10 km/h north ridgetop wind. Treeline temperature -4 °C. Freezing level 700 m.
Wednesday
Mix of sun and cloud. 10 to 20 km/h north ridgetop wind. Treeline temperature +3 °C. Freezing level 1600 m.
Thursday
Sunny. 10 to 20 km/h north ridgetop wind. Treeline temperature +4 °C. Freezing level 1700 m.
Friday
Sunny. 10 to 20 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level 1500 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Be aware of the potential for surprisingly large avalanches due to deeply buried weak layers.
- Avoid steep convex slopes.
- Be alert to conditions that change with elevation and sun exposure.
- Cornice failures could trigger very large and destructive avalanches.
- Back off slopes as the surface becomes moist or wet with rising temperatures.
Problems
Persistent Slabs
A few large slab avalanches were recently reported on a variety of aspects on steep alpine slopes. They likely failed on either a crust or a weak layer of surface hoar down 30 to 70 cm.
Aspects: All aspects.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 24th, 2024 4:00PM
