Groomer triggered slide, crown

Crown of an avalanche triggered on 2/27/2020 at 8:30 p.m. by a groomer between Storm Castle and Swan Creeks in the northern Gallatin Range. The driver was ok, but the machine did a full barrel roll and was very badly damaged. It broke 2-3' deep on weak sugary snow near the ground. It was on a West aspect at 7,500' elev., 100' wide, 600' long. Photo: GNFAC