A snowbiker got too close to edge of the ridge on Lionhead and broke a cornice which triggered an avalanche about 100 feet wide. His sled fell with the cornice but the rider was able to jump to safety. This is the second cornice triggered avalanche that caught riders this week. Photo: GNFAC
16-17
GNFAC Avalanche Advisory for Thu Mar 9, 2017
Snowpack and Avalanche Discussion
GNFAC Avalanche Advisory for Thu Mar 9, 2017
Snowpack and Avalanche Discussion
GNFAC Avalanche Advisory for Wed Mar 8, 2017
Snowpack and Avalanche Discussion
Lionhead area near West Yellowstone Cooke City
From an email: "Here is a wind slab that I triggered from where the picture was taken (About 40 ft away on the ridge line). This is the backside of Lick Creek in Hyalite. The slide was about 100ft wide with a crown ranging between 4-12 inches and did not run very far. A snow pit dug nearby showed no signs of instability, we were confident in skiing the non windloaded terrain nearby." Photo: K. Jamieson
We easily triggered this wind slab at Lionhead. There was a lot of cracking on thick, freshly formed wind slabs today. Heads up! Photo: GNFAC
GNFAC Avalanche Forecast for Tue Mar 7, 2017
Snowpack and Avalanche Discussion
Gallatin Range Madison Range Lionhead area near West Yellowstone Cooke City
A ski tourer south of Cooke City noted several small soft slab slab avalanches breaking in new snow – approx. 7” crown(s). None were deep and they all ran for short distances. Photo: J. Logan