Regions
Northwest Coastal.
Strong winds have produced wind slabs in lee and cross-loaded features. The best riding will be in areas sheltered from the wind and effects from the recent warming.
Weather Forecast
WEDNESDAY: Cloudy with light snowfall early morning, accumulation 2 to 5 cm, moderate southerly winds, alpine temperature -2 C, freezing level 1100 m.THURSDAY: Mostly cloudy with light snowfall, accumulation 1 to 3 cm, light northwesterly winds, alpine temperature -3 C, freezing level 900 m.FRIDAY: Mix of sun and cloud, light northwesterly winds, alpine temperature 0 C, freezing level 1500 m.
Avalanche Summary
Numerous wind slabs were triggered by skiers in immediate lee features. They were small (up to size 1.5) and generally on northerly aspects. Otherwise, widespread loose wet avalanche activity was noted in the region on southerly aspects, up to size 2.
Snowpack Summary
Strong easterly to southerly winds have redistributed recent snow and produced variable surfaces in alpine and treeline terrain, including wind slabs in lee and cross-loaded features. This overlies a sun crust on solar aspects and 5 to 20 mm surface hoar on sheltered, shady aspects at all elevation bands. Expect the snow surface to be a melt-freeze crust on solar aspects and on all aspects below 1400 m, up to 20 cm thick.Beneath this, layers of crusts, facets, and isolated surface hoar buried 50 to 100 cm exist below the surface from mid- and late-February. A surface hoar and crust layer from January is buried around 150 to 200 cm.Near the bottom of the snowpack, sugary facets exist in colder and dryer parts of the region, such as the far north.
Problems
Wind Slabs
Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.