Flathead Pass Avalanche

Flathead Pass Avalanche

This avalanche was triggered by a cornice drop from the ridge above.  It broke nearly 1,000 feet wide and ran 1,000 vertical with a crown face of 3-5 feet.  It failed on facets near the ground.  Photo by Matt Weiland 

This image is from the following advisory:
GNFAC Avalanche Advisory for Sun Feb 21, 2010
GNFAC Avalanche Advisory for Mon Feb 22, 2010
GNFAC Avalanche Advisory for Tue Feb 23, 2010
GNFAC Avalanche Advisory for Wed Feb 24, 2010