From obs. 4/4/20: "Avalanche today up portal creek. 2 1/2 ft crown and 4 - 5 ft runout. Triggered by snowmobile. Everyone was safe!"
Location
Advisory Year
Avalanche Details: Snowmobile triggered slab Portal Creek
Forecast link: GNFAC Avalanche Forecast for Sun Apr 5, 2020GNFAC Avalanche Forecast for Mon Apr 6, 2020
Northern Gallatin, 2020-04-04
Forecast link: GNFAC Avalanche Forecast for Sun Apr 5, 2020GNFAC Avalanche Forecast for Mon Apr 6, 2020