GNFAC Avalanche Forecast for Wed Dec 28, 2016
Snowpack and Avalanche Discussion
Madison Range Southern Gallatin Range
Lionhead area near West Yellowstone Cooke City
16-17
GNFAC Avalanche Advisory for Tue Dec 27, 2016
Snowpack and Avalanche Discussion
Bridger Range Gallatin Range Madison Range
Lionhead area near West Yellowstone
Winds either scoured or loaded all exposed slopes over the last 48 hours. Winds blew from every directon at all elevations. This photo was taken up Hyalite in the N. Gallatin Range. Photo: B. VandenBos
Evidence of strong winds were everywhere yesterday. These ripples of wind blown snow are evidence of crossloading on slopes. This picture was taken up Hyalite in the N. Gallatin Range. Photo: B. VandenBos
GNFAC Avalanche Advisory for Mon Dec 26, 2016
Snowpack and Avalanche Discussion
Bridger Range Gallatin Range Madison Range
Lionhead area near West Yellowstone
The bottom 15cm of the snowpack consisted of large depth hoar crystals (4+mm). As we skied up we heard one large collapse on this layer and in our snowpit this layer failed at ECTP12 and 17. Either sign of instability (the collapse or the poor test scores) was enough for us to choose not to ski the steeper gully. Photo: GNFAC
GNFAC Avalanche Advisory for Sun Dec 25, 2016
Snowpack and Avalanche Discussion
Southern Madison Range Southern Gallatin Range
Lionhead area near West Yellowstone
GNFAC Avalanche Forecast for Sat Dec 24, 2016
Snowpack and Avalanche Discussion
Cooke City Southern Gallatin Range
Southern Madison Range Lionhead area near West Yellowstone