South Face of Lone Peak avalanche

South Face of Lone Peak avalanche

The Big Sky Ski Patrol triggered this avalanche on the south face of Lone Peak with minimal explosives. It broke 3-4' deep on facets at the ground and propagated 1200' wide. This instability also exists in the backcountry. Photo: Big Sky Ski Patrol

This image is from the following advisory:
GNFAC Avalanche Advisory for Thu Dec 8, 2016
GNFAC Avalanche Advisory for Fri Dec 9, 2016
GNFAC Avalanche Advisory for Sat Dec 10, 2016
GNFAC Avalanche Advisory for Sun Dec 11, 2016