Snowmobilers up Portal Creek in the northern Gallatin Range experienced cracking/collapsing and triggered this small avalanche. The slide broke 1' foot deep and nearly 100' wide. Fortunately, nobody was caught. Avalanche activity is the best indicator the snowpack is unstable. Photo: A. Donovan
Advisory Year
Avalanche Details: Cracking/collapsing and human triggered slide, Portal Creek
Forecast link: GNFAC Avalanche Forecast for Fri Jan 11, 2019
Northern Gallatin, 2019-01-10
Forecast link: GNFAC Avalanche Forecast for Fri Jan 11, 2019