Slab avalanche beside up track toward exit gully knob

Warmed up considerably throughout the day, snow quite heavy coming out through trees (~1000m asl). Skied east aspect 1500m to 1000m. (Cool Lars couloir). 1500-1400 had reactive snow with soft slab properties. 1400-1200 10-15cm of powder overlaying a strong crust. Lower 1200-1000 exiting through the creek had deep wet powder.