Blackcomb Backcountry Pattison Trorey Decker

Skies mostly cloudy with flurries. Winds light at ridgetop from SW. Temps -5 to -2 Size 3.5 observed on Decker 9th Hole entraining and displacing rocks. Cornice on Decker Glacier approach is starting to peel off rocks exposing holes. Skied NW, N slopes. Between 10-15cms of low density snow on those aspects overlaying a 4f layer above 2100m with the 4F layer degrading to a stiff melt freeze below that elevation. Some sizeable avalanche debris fragments on S slopes