Jasper

We are entering a period of changing weather, which will affect avalanche conditions. Reassess your usual ski lines, as shifting winds will redistribute wind slabs to new locations. Ice climbers should avoid routes with overhead exposure, as even a small loose dry avalanche could knock you off your feet.

WednesdayUp to 6 cms expected by Wednesday night. Strong westerly ridgetop winds will arrive with freezing levels at valley bottom and alpine temperatures around -7 C.

Up to 10 cms expected by Thursday afternoon. Expect strong southwesterly winds with temperatures dropping throughout the day to -14 C.

• Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
• Back off if you encounter whumpfing, hollow sounds, or shooting cracks.

Tuesday road patrol observed few small wind slab avalanches initiating at ridge tops and running as loose dry for short distance. Marmot Basin reported a small natural avalanche scrubbing to ground in the alpine on north aspect, suspected to be triggered out of steep rocky terrain

The snowpack is 60-120cm in depth at tree line. 10-30cm sits atop a weakening melt freeze crust and surface hoar layer from early December. The middle of the snowpack is facetted and there is a deep persistent layer at the base of the snowpack consisting of a decomposing melt freeze crust and depth hoar.