Recreational Observation

22 degree slope with a northerly aspect

Feb. 6, 2016, 2 p.m. PST

Weather: Cool & clear

Snowpack: Solid 14" top layer over weak hoarfrost layer

Area Description: Pt 6191 about a half mile south of Lillian Mountain east of Blewett Pass

Avalanches: A party of six snowshoed east of Blewett Pass this past Saturday (Feb 6th) to point 6191 about a half mile south of Mt Lillian east of Blewett Pass. As we approached the summit at 6120 elevation on a 22 degree slope in trees with a northerly aspect we set off a “wompf!” and saw a crack propagate approximately 50 feet across the slope 7 feet above us. Given the low slope angle the snow mass moved no more than ½”. We dug down along the crack and about 14 inches down we found the hoarfrost layer that gave way. Had we been on a slope with a steeper angle this might have been a more significant event.

Observation by William Ashby

Latitude: 47.324750

Longitude: -120.665039

Did you see any avalanches? No

Did you trigger any avalanches? No

Was anyone caught in an Avalanche? No