This drift collapsed and cracked 30 feet wide, accompanied by an audible "whumph", as we skinned over it. 12/15/18 West side of Bridger Range. Recent strong winds formed hard slabs over weak surface hoar and facets. Photo: GNFAC
Advisory Year
Avalanche Details: Cracking and "whumphing" drifts, Bridgers
Bridger Range, 2018-12-15