GNFAC Avalanche Advisory for Mon Feb 2, 2015
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
Winter is doing its best to make a return. After weeks of above average temperatures and below average precipitation, this latest round of snow is a welcomed sight. While 4-6 inches will improve overall riding conditions, it will also increase the avalanche danger.
GNFAC Avalanche Forecast for Sun Feb 1, 2015
Cooke City
GNFAC Avalanche Advisory for Sat Jan 31, 2015
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
Fresh surface hoar was observed in the Lionhead area near West Yellowstone. Photo J. Norlander.
This new layer of surface hoar was observed north of Cooke City. This layer could become a significant problem once buried. Photo B. Zevora
Forecast link: GNFAC Avalanche Forecast for Sun Feb 1, 2015
GNFAC Avalanche Advisory for Fri Jan 30, 2015
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
The Yellowstone Club Ski Patrol observed tons of surface hoar crystals on Jan 29. Some were nearly 1 cm in size. These can become a future weak layer once a slab of snow forms on top of them. Think of a stack of bricks (slab) resting on potato chips (surface hoar). Hopefully strong winds will return knock down these crystals before snow falls. Photo: YCSP
Forecast link: GNFAC Avalanche Advisory for Fri Jan 30, 2015GNFAC Avalanche Advisory for Sat Jan 31, 2015GNFAC Avalanche Forecast for Sun Feb 1, 2015GNFAC Avalanche Advisory for Mon Feb 2, 2015GNFAC Avalanche Advisory for Tue Feb 3, 2015GNFAC Avalanche Advisory for Wed Feb 4, 2015GNFAC Avalanche Advisory for Thu Feb 5, 2015
This small wind slab was triggered by a snowmobile when it hit the rock seen in crown of the avalanche. This slope is NNE facing and just under 10K feet in elevation. Photo: S. Strenge
GNFAC Avalanche Advisory for Thu Jan 29, 2015
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City