From an email:
From afar, observed a large R4/5 D3, to the ground, off of the entire NE shoulder of Fox Mtn. (see attached photo) as well as a couple of scattered R1/D1 wind slabs on upper elevations on E/NE aspects.
Location
Mt Fox
Avalanche Details: Large natural avalanche on Mt. Fox, Cooke City
Forecast link: GNFAC Avalanche Forecast for Thu Jan 16, 2020
Cooke City, 2020-01-15
Forecast link: GNFAC Avalanche Forecast for Thu Jan 16, 2020