Wind Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
Be careful transitioning into wind affected terrain, especially near ridge crests and rollovers.
Triggering wind slabs and persistent slabs remains possible in the region.
Be careful transitioning into wind affected terrain, especially near ridge crests and rollovers.
Persistent weak layers of crusts/facets or surface hoar in the top 200 cm of the snowpack may remain possible to trigger. Signs of instability may not be evident, so the best defence is choosing smaller, low-consequence terrain.
On Friday, explosives triggered a size 2.5 slab out of a north-facing treeline feature. It was up to 70 cm deep and suspected to have failed on a persistent weak layer, a crust from mid-March. Several size 1 skier-triggered slabs were also reported below treeline, along with naturally triggered storm slabs up to size 2.
Strong winds from variable directions left slabs and pressed surfaces in open and exposed terrain at upper elevations.
10 to 30 cm of softer settling snow can be found in wind-sheltered, shady areas. This snow is covering a variety of old surfaces, including surface hoar, facets, crusts, and/or wind-scoured snow. A new suncrust may have developed on sunny aspects.
There are multiple persistent weak layers consisting of crust/facets or surface hoar in the top 250 cm of the snowpack. While triggering these layers is trending unlikely, they present a low-probability, high-consequence problem.
Saturday Night
Mostly clear skies. 10 km/h west ridgetop wind. Treeline temperature -10 °C.
Sunday
Mix of sun and clouds. 10 km/h west ridgetop wind. Treeline temperature -11 °C.
Monday
Mostly cloudy. 0 to 5 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -10 °C.
Tuesday
Mostly cloudy. 4 to 6 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -6 °C.
More details can be found in the Mountain Weather Forecast.