A backcountry skier wrote, "...observed a fairly large, cornice-triggered avalanche on an east aspect at 9600’ that looked to be several hours old. The crown was 40-100 cm deep, and it looked like it failed about 20 cm into the facets that make up the lower half of the snowpack in this region."
Location
Advisory Year
Avalanche Details: Cornice triggered avalanche in Divide Basin, Hyalite
Forecast link: GNFAC Avalanche Forecast for Tue Jan 5, 2021
Northern Gallatin, 2021-01-04
Forecast link: GNFAC Avalanche Forecast for Tue Jan 5, 2021