Area closures in Jasper National Park for caribou in winter. No backcountry access in the Tonquin, Brazeau, and north boundary regions of the park. For details follow the “Seasonal closures” link in the Resources below (bottom of page).
Tuesday's 40cm storm had some moderate Southwest winds which loaded some slopes into windslabs.
The Nov. 4 crust is down 60cm to 80cm at tree line. Wind slabs potentially could step down to this layer or even deeper to the basal instability creating large destructive avalanches. Caution at thick to thin snowpack areas.
Deep persistent slabs are best managed by:
Cornices are best managed by:
Cooler temperatures, no snow, calm to light winds and mostly clear skies are forecasted for the next few days.
40cm of storm snow from Dec 8th with moderate SW winds resulted in mainly ridgetop or exposed treeline wind slabs. The snow is settling. It overlies a variety of surfaces like hard slabs in the alpine and treeline, facets and isolated surface hoar at treeline, and crusts on steep solar aspects. The depth of the Nov 4th rain crust is 60-80cm down.
Wednesday noted numerous loose dry natural avalanches size 1.5 on all aspects and elevations and explosive control resulted in a few slab avalanches size 2 and one size 3 on a Northeast alpine feature. Thursday's patrol noted no new avalanches and the visibility was excellent.