This natural avalanche occured on a wind loaded slope on Lone Mountain late Friday night. It is notable because Big Sky is not open, and the snowpack there is similar to the snowpack in other high alpine locations. This avalanche broke near the ground about 3 feet deep and 500 feet across. It ran about 1000 feet and deposited snow 6 feet deep at the toe of the debris.
Forecast link: GNFAC Avalanche Forecast for Thu Nov 5, 2009