Avalanche Forecast
Issued: Apr 19th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
BW,
Avalanche Canada
Watch for fresh wind slabs as you transition into alpine terrain.
Summary
Confidence
Moderate
Avalanche Summary
Several natural and cornice triggered wind and storm slabs have been reported over the past several days. A large deep release was reported out of the north side of Surprise Pass on Tuesday. Ski-hills only reported small loose dry avalanches out of steep terrain today.
Snowpack Summary
15-40 cm of snow in past week (most around Lake Louise) overlies previous storm snow at upper elevations and rain-crusts below 1800 m. Recent strong winds have created wind-slabs in the alpine. The basal depth hoar is only a concern in shallow snowpack areas. Lower elevations have a temperature crust on all aspects.
Weather Summary
Thursday: Isolated showers or alpine flurries in the morning and light convective activity in the afternoon along the divide. Up to 5 cm of snow forecasted. Freezing levels between 14-1700 m. Light winds.
Friday: Flurries with minor accumulations. Winds swing to SW and increase to moderate throughout the day. Freezing levels rise to 2000 m.
Terrain and Travel Advice
- Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
Problems
Wind Slabs
Recent snow (15-40 cm in past week) and strong winds will have created wind slabs in lee alpine terrain and may extend down into some tree-line features.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 20th, 2023 4:00PM
