Lots of naturals and maybe a rider triggered avalanche seen today. Steep solar aspects had lots of wet loose activity and small cornice/pillow fall.
22-23
Southern gallatin deep slab
I went through the area of Three Rivers Peak yesterday, and there had been a pretty nice cycle of large slides recently. One on the east face of Three Rivers broke 6-800’ wide 2-10’+ deep, and ran full track. It only had a couple inches of snow on it, so I think it ran sometime during the recent warm days. Some of the walls along the slide were over 20’ high, and I imagine the debris pile might make it through the summer.
I also observed a couple older slides on E\NE aspects that were older, but not a whole lot smaller.
From obs. 4/7/23: "I went through the area of Three Rivers Peak yesterday, and there had been a pretty nice cycle of large slides recently. One on the east face of Three Rivers broke 6-800’ wide 2-10’+ deep, and ran full track. It only had a couple inches of snow on it, so I think it ran sometime during the recent warm days. Some of the walls along the slide were over 20’ high, and I imagine the debris pile might make it through the summer. I also observed a couple older slides on E\NE aspects that were older, but not a whole lot smaller." Photo: S. Reinsel
Forecast link: GNFAC Avalanche Forecast for Sun Apr 9, 2023
From obs. 4/7/23: "I went through the area of Three Rivers Peak yesterday, and there had been a pretty nice cycle of large slides recently. One on the east face of Three Rivers broke 6-800’ wide 2-10’+ deep, and ran full track. It only had a couple inches of snow on it, so I think it ran sometime during the recent warm days. Some of the walls along the slide were over 20’ high, and I imagine the debris pile might make it through the summer. I also observed a couple older slides on E\NE aspects that were older, but not a whole lot smaller." Photo: S. Reinsel
Forecast link: GNFAC Avalanche Forecast for Sat Apr 8, 2023GNFAC Avalanche Forecast for Fri Apr 14, 2023
From obs. 4/7/23: "I went through the area of Three Rivers Peak yesterday, and there had been a pretty nice cycle of large slides recently. One on the east face of Three Rivers broke 6-800’ wide 2-10’+ deep, and ran full track. It only had a couple inches of snow on it, so I think it ran sometime during the recent warm days. Some of the walls along the slide were over 20’ high, and I imagine the debris pile might make it through the summer. I also observed a couple older slides on E\NE aspects that were older, but not a whole lot smaller." Photo: S. Reinsel
Forecast link: GNFAC Avalanche Forecast for Sun Apr 9, 2023GNFAC Avalanche Forecast for Tue May 2, 2023
From obs. 4/7/23: "I went through the area of Three Rivers Peak yesterday, and there had been a pretty nice cycle of large slides recently. One on the east face of Three Rivers broke 6-800’ wide 2-10’+ deep, and ran full track. It only had a couple inches of snow on it, so I think it ran sometime during the recent warm days. Some of the walls along the slide were over 20’ high, and I imagine the debris pile might make it through the summer. I also observed a couple older slides on E\NE aspects that were older, but not a whole lot smaller." Photo: S. Reinsel
Forecast link: GNFAC Avalanche Forecast for Sat Apr 8, 2023
Snowmobile triggered wind slab Storm Castle
From obs 4/7/23: "Small wind slab triggered by snowmobile. Slope was assessed by group as wind blown before climb. No one was caught. East facing slope, Storm castle Ridge. Photo one shows trigger point where the Snowmobiler carved hard and set off the slab deeper in the snowpack"
From obs 4/7/23: "Small wind slab triggered by snowmobile. Slope was assessed by group as wind blown before climb. No one was caught. East facing slope, Storm castle Ridge. Photo one shows trigger point where the Snowmobiler carved hard and set off the slab deeper in the snowpack"
Forecast link: GNFAC Avalanche Forecast for Sat Apr 8, 2023
From obs 4/7/23: "Small wind slab triggered by snowmobile. Slope was assessed by group as wind blown before climb. No one was caught. East facing slope, Storm castle Ridge. Photo one shows trigger point where the Snowmobiler carved hard and set off the slab deeper in the snowpack."
Forecast link: GNFAC Avalanche Forecast for Sun Apr 9, 2023
From obs 4/7/23: "Small wind slab triggered by snowmobile. Slope was assessed by group as wind blown before climb. No one was caught. East facing slope, Storm castle Ridge. Photo one shows trigger point where the Snowmobiler carved hard and set off the slab deeper in the snowpack"