Avalanche Forecast
Issued: Jan 27th, 2019 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Deep Persistent Slabs.
stephen holeczi,
Parks Canada
Thin and variable snowpack areas are of greatest concern for triggering the weaker basal facets.
Summary
Weather Forecast
Cooling temperatures (lows -15C at 3000m, high -12C) for Monday and slightly warmer on Tuesday. The extreme winds have died down and will be light to moderate from the NW. No real snow is forecast for the next 48 hours.
Snowpack Summary
10-20cm of snow over the last week over isolated suncrusts and surface hoar. Widespread wind effect in the alpine. Of greatest concern are the weak facets and depth hoar at the base of the snowpack. In thinner snowpack areas with less than 150 cm of snow, triggering a slab on these facets is more likely.
Avalanche Summary
No new avalanches observed or reported today.
Confidence
Problems
Deep Persistent Slabs
The weak Oct.26 facets and depth hoar at the base of the snowpack have a significant slab (50-130cm thick) sitting above them. The likelihood of triggering this layer has decreased, but if it does get triggered, the avalanche will be large in size.
Be aware of the potential for full depth avalanches due to weak layers at the base of the snowpack.Avoid thin, rocky or unsupported slopes.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 28th, 2019 4:00PM
