Forecast snowfall amounts vary across the region. Areas that receive more than 20 cm of new snow may face higher avalanche danger than anticipated.
Storm slab size and reactivity are expected to increase with the arrival of new snow overnight, particularly in areas where it overlays a smooth melt-freeze crust.
A couple of naturally triggered storm slab avalanches were reported over the weekend on various aspects in high alpine terrain.
A naturally triggered size 2.5 persistent slab avalanche was reported on an east aspect in the alpine on Saturday. The slab failed on a crust below recent storm snow. It was in steep, rocky, wind-affected terrain below an alpine ridgetop.
Overnight snowfall may bury a variety of surfaces, including hard crusts, moist snow, or dry, powder snow.
The new snow may form cohesive, surface slabs in areas affected by wind or late in the day, resulting from daytime warming.
A series of crusts exist in the upper snowpack.
Monday Night
Cloudy with 0 to 15 cm of snow at higher elevations, with as much as 25 cm in areas around Revelstoke. Freezing level 1200 m. 10 to 30 km/h west ridgetop wind. Treeline temperature -5 °C.
Tuesday
Cloudy with 0 to 10 cm of snow at higher elevations. Freezing level 1200 m. 10 to 30 km/h northwest ridgetop wind. Treeline temperature -5 °C.
Wednesday
Mix of sun and cloud. 0 to 20 km/h north ridgetop wind. Treeline temperature -5 °C. Freezing level 1400 m.
Thursday
Mostly sunny. 0 to 20 north ridgetop wind. Treeline temperature -5 °C. Freezing level 1400 m.
More details can be found in the Mountain Weather Forecast.
