Avalanche Forecast
Issued: Dec 13th, 2019 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs.
kdevine,
Avalanche Canada
The recent snow has added load to buried weak layers and may still be reactive to human triggers. Conservative terrain selection is recommended.
Summary
Confidence
Weather Forecast
FRIDAY NIGHT - Cloudy with clear periods and isolated flurries / light northeast winds / alpine low temperature near -7
SATURDAY - Mainly cloudy with isolated flurries / light west winds / alpine high temperature near -7
SUNDAY - A mix of sun and cloud / light northwest winds / alpine high temperature near -9
MONDAY - Cloudy with sunny periods / southwest winds, 20-30 km/h / alpine high temperature near -4
Avalanche Summary
On Friday, there were reports of several explosives triggered and natural avalanches up to size 2.
On Thursday, there were several reports of human and explosives triggered avalanches up to size 2. Some of these avalanches stepped down to a weak crust/facet layer that was buried in mid November.
No new avalanches were reported on Wednesday.
Snowpack Summary
15-25 cm of recent fresh snow likely sits on a weak layer of feathery surface hoar in many areas, as well as sugary faceted snow in some areas. There is a crust from mid November that is now down approximately 45-100 cm. Recent snowpack tests have shown that the snow above the crust is weak and could produce avalanches. The snowpack is unusually shallow and weak for the Sea to Sky region. Snowpack depths range between 80-200 cm and taper quickly at lower elevations.
Problems
Storm Slabs
Fresh storm slabs are likely sitting on a weak layer of surface hoar and/or facets. These slabs may be reactive to human triggers, especially in wind loaded areas. The potential exists for storm slabs to step down to a weak layer buried in mid November.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 14th, 2019 5:00PM
