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GNFAC Avalanche Advisory for Tue Feb 7, 2012
Snowpack and Avalanche Discussion
The southern Madison and southern Gallatin Ranges, the Lionhead area near West Yellowstone and the mountains around Cooke City:
GNFAC Avalanche Forecast for Mon Feb 6, 2012
Snowpack and Avalanche Discussion
The southern Madison and southern Gallatin Ranges, the Lionhead area near West Yellowstone and the mountains around Cooke City:
The avalanche broke on Friday, February 3rd. It was likely a natural slide that failed on a thick layer of facets at the ground. Wind-loads from the southwest and south made hard slabs up to three feet thick. The slide ran 800 feet vertical (measured) and estimated to be 300 feet wide. Photo: GNFAC
The avalanche was up to three feet deep. It was mostly a hard slab of wind-loaded snow sitting on a widespread layer of facets. The steepness ranged from 40 to 45 degrees. Photo: GNFAC
Forecast link: GNFAC Avalanche Forecast for Mon Feb 6, 2012