Avalanche Forecast
Issued: Apr 17th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Cornices.
zryan,
Avalanche Canada
Avalanche activity is unlikely given the current cool and cloudy weather.
Continue to be mindful of your exposure to cornices when travelling on and below ridgelines.
Summary
Confidence
High - The snowpack structure is generally well understood.
Weather Forecast
SUNDAY NIGHT: Increasing cloud cover. Treeline temperatures dropping to -5 C. 20-30 km/h wind from the southeast.Â
MONDAY: High cloud in the morning, increasing throughout the day. Light flurries in the afternoon above 1400 m, rain below. 25-35 km/h wind from the southeast.
TUESDAY: Cloudy with precipitation, 5-15 cm of new snow accumulation above 1300 m, rain below. Treeline temperatures rising to -2 C. 30-50 km/h wind from the west.
WEDNESDAY: Partially cloudy. Treeline temperatures rising to 0 C. Light wind from the south.Â
Avalanche Summary
Avalanche activity the last week has primarily been large cornice failures on north and east-facing slopes. For the most part, these have not triggered avalanches on the slopes below.
Snowpack Summary
At treeline and above up to 20 cm of consolidated, wind-affected snow covers a crust all aspects up to 2200 m and mountain tops on solar aspects. Recent northeast wind has formed wind slabs on lee aspects below ridgetops and left a variety of wind-affected surfaces. Another prominent crust layer is found 30-70 cm deep.Â
Cornices are very large and exposure to slopes beneath them should be minimized, especially if the weather is sunny, warm, or windy.
Terrain and Travel
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
- Back off slopes as the surface becomes moist or wet with rising temperatures.
Problems
Cornices
Cornices may be weak and reactive to human triggers. Give them a wide berth when travelling on ridges. They are a significant hazard alone and may produce large slab avalanches as they fall onto the slope below. Cornice falls are more likely when the weather is sunny, warm, or windy.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 18th, 2022 4:00PM
