A skier triggered a large (7'x25') cornice from the ridge above the Hourglass chute north of Bridger Bowl on 2/9. They were skiing along the ridgeline, 10-15' back from the edge when a large chunk broke off nearby. It entrained recent snow and ran over 1,000' into flat terrain across a common skin track, and broke trees up to 8" diameter. No one was caught.
Forecast link: GNFAC Avalanche Advisory for Sat Feb 10, 2018