Avalanche Forecast
Regions: Glacier.
Weather Forecast
Today will bring rising freezing levels (1600m) and moderate to strong SW winds. A pulse of snow should arrive tonight, bringing 10cm. Monday should be slightly cooler with flurries, but winds will increase to strong from the SW. More snow on Tuesday; 25cm with strong SW winds and freezing levels rising to 1400m.
Snowpack Summary
Extreme S winds on Saturday morning created wind slabs in the alpine. The December 9th persistent weak layer (surface hoar, sun crust and facets) is buried 60-100cm and is reactive where the overlying slab is dense. The November 21st persistent weak layer is down 120-160cm. Height of snow at treeline is approx 2m, and 1m at Rogers Pass.
Avalanche Summary
An extensive natural avalanche cycle occurred early Saturday morning, correlating with the high to extreme winds measured at that time. Numerous avalanches from sz 2 to 3's were observed both east and west of the summit from all aspects. A skier-triggered sz 1.5 avalanche off a gully sidewall partially buried one person in NRC Gully Saturday.
Confidence
Due to the number and quality of field observations
Avalanche Problems
Wind Slabs
Aspects: North, North East, East, West, North West.
Elevations: Alpine, Treeline.
Likelihood: Likely
Expected Size: 1.5 - 2.5
Persistent Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood: Likely
Expected Size: 2 - 3.5