GNFAC Avalanche Forecast for Thu Dec 15, 2016
Snowpack and Avalanche Discussion
Bridger Range Northern Gallatin Range
Primary Problem – Wind Slabs
Secondary Problem – Deep Persistent Slabs
16-17
GNFAC Avalanche Advisory for Wed Dec 14, 2016
Snowpack and Avalanche Discussion
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
On Monday, December 12, a cornice was kicked off the ridge at Bridger Bowl and it triggered the slope below. The van-sized cornice broke easily and pulled away farther back than expected. Cornices need to be given a wide berth. Photo: Bridger Ski Patrol
Forecast link: GNFAC Avalanche Advisory for Fri Dec 16, 2016
On Saturday, December 11, a snowmobiler was completely buried in the 2nd Yellowmule of Buck Ridge. From am email:
On Saturday, December 11 a snowmobiler was completely buried in the 2nd Yellowmulke of Buck Ridge. From am email:
Forecast link: GNFAC Avalanche Advisory for Wed Dec 14, 2016
The north face of Mt. Blackmore avalanched on Dec 10 or 11. It likely failed on the layer of facets on the ground, like all the other instabilities in the areas. Photo: G. Antonioli
GNFAC Avalanche Advisory for Tue Dec 13, 2016
Snowpack and Avalanche Discussion
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
Looking down the path from the crown gives an idea of it's steepness and runout zone. The slope averaged 40 degrees with it's steepest part measured at 43 degrees. The victim was found in the trees marked by the red X. Photo: GNFAC
Forecast link: GNFAC Avalanche Advisory for Tue Dec 13, 2016
The avalanche broke on a layer of well-developed facets that are sitting on an ice crust. The crack in the snowpit wall is a remnant slab that cracked, but did not slide down the hill in the avalanche. Photo: GNFAC
Forecast link: GNFAC Avalanche Advisory for Tue Dec 13, 2016