Avalanche Forecast
Regions: Sea To Sky.
Confidence
Fair - Timing, track, or intensity of incoming weather is uncertain
Weather Forecast
The big story for the forecast period is an intense frontal system lined-up to hit the South Coast on Monday night. WInds will be in the strong to extreme range with heavy snow accumulations. Tuesday: moderate snowfall tapering off around mid-day - moderate to strong southwest winds decreasing throughout the day - freezing level at 1100m Wednesday: very light snowfall - light southwest winds - freezing levels at 900m Thursday: Mix of sun and cloud as a clearing trend develops - light north winds - freezing level at 1100m
Avalanche Summary
On Sunday, ski cutting and explosives control produced numerous size 1-1.5 windslab avalanches that ran within snow that fell over the previous 24hrs. Expect widespread wind and storm slab avalanche activity with potential to step down to the deeper March 26 interface with weather forecast for Monday night.
Snowpack Summary
Light to moderate new snow accumulations have added to the 75-100cm that fell last week. Winds have mostly been moderate with strong gusts creating wind slabs on lee slopes. The past week's snow overlies reactive surfaces that were buried on March 26. This interface consists of a crust which exists on all aspects except true north facing slopes at treeline and in the alpine, where small surface hoar may be present in sheltered places. Below the March 26 interface, the snowpack is well settled and bonded. Cornices are huge, and will continue to grow with the forecast weather pattern.
Avalanche Problems
Wind Slabs
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood: Very Likely
Expected Size: 1 - 5
Storm Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood: Likely
Expected Size: 1 - 6
Cornices
Aspects: North, North East, East, South East.
Elevations: Alpine.
Likelihood: Likely
Expected Size: 1 - 6