15-16
This avalanche likley occured naturally around Feb 1. It was in heavily wind loaded terrain. 1-2 feet deep and ran over 1000 feet vertical. This is an example of the type of terrain where you could trigger a large avalanche on facets or depth hoar. Photo: B. VandenBos
Forecast link: GNFAC Avalanche Forecast for Sat Feb 6, 2016
GNFAC Avalanche Advisory for Fri Feb 5, 2016
Snowpack and Avalanche Discussion
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
GNFAC Avalanche Advisory for Thu Feb 4, 2016
Snowpack and Avalanche Discussion
Bridger Range
GNFAC Avalanche Advisory for Wed Feb 3, 2016
Snowpack and Avalanche Discussion
Bridger Range
GNFAC Avalanche Advisory for Tue Feb 2, 2016
Snowpack and Avalanche Discussion
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
This avalanche was triggered by a snowmobiler about 1/4 of the way up a wind-loaded southeast facing slope at 8,000 feet. It broke up to 18" deep, 150' wide and ran approx 300' slope distance. Photo: B. Rasmussen
One of our observers saw another skier trigger this small slab avalanche on a north-facing slope around 9,000', 2-3' deep and about 35' wide. Given how shallow it is, it might be a repeat avalanche, running on depth hoar near the ground. Photo: B. Fredlund