Avalanche Forecast
Issued: Dec 17th, 2014 8:00AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs.
danyelle magnan,
Parks Canada
If you are walking around today notice the large surface hoar that has been growing, and remember it on the weekend when they will become a real concern if the forecast snow arrives.
Summary
Weather Forecast
Today we should see increasing cloud with isolated flurries, light SW winds at ridge top, and an alpine high of -4'C. Thurs and Friday will be mostly cloudy with flurries, light but gusty SW winds and alpine highs of -1. The new snow will bury and preserve big surface hoar that will be an issue when the real snow comes over the weekend.
Snowpack Summary
New surface hoar, up to 2cm in size, is growing on a rain crust to 2100m and on settling snow above 2100m. Pockets of surface hoar that was buried in early Dec is down ~40cm, is spotty in distribution, but may be triggerable if present. Well settled mid-pack with 30cm crust/facet basal weakness (Nov 9) observed in certain locations.
Avalanche Summary
No new avalanches have been observed since Dec 12th.
Confidence
Problems
Persistent Slabs
The November crust weaknesses at the bottom of the snowpack are difficult to trigger, but if they fail the consequences will be very high.
Avoid shallow snowpack areas where triggering is more likely.Be wary of slopes that did not previously avalanche.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 18th, 2014 8:00AM
