GNFAC Avalanche Advisory for Sun Mar 19, 2017
Bridger Range Madison Range Gallatin Range Cooke City
Lionhead area near West Yellowstone
GNFAC Avalanche Forecast for Sat Mar 18, 2017
Temperatures did not drop below freezing last night. However, clear skies allowed for radiational cooling, which will firm up the snow surface. This will eliminate the wet snow avalanche hazard during the early morning hours.
GNFAC Avalanche Forecast for Fri Mar 17, 2017
The mountains around Cooke City got lucky last night and picked up 6-8” of snow totaling .8” of SWE. This new snow will improve riding conditions, but it will also bump up the avalanche danger. Wind slabs and wet loose avalanches will both be a concern today. Wind slabs will be most widespread on upper elevation slopes leeward to W-SW winds. These won’t be exceptionally large, but they could pack enough punch to ruin the day and send you back to the pub.
GNFAC Avalanche Advisory for Thu Mar 16, 2017
Today, wet snow avalanches are the primary concern. Below 9,000’, temperatures have not dropped below freezing for multiple days (video).
GNFAC Avalanche Forecast for Wed Mar 15, 2017
Bridger Range Madison Range Gallatin Range
Lionhead area near West Yellowstone Cooke City
Roller balls are a sign that the surface of the snow is getting moist and weak. Photo: G. Antonioli
Roller balls are a sign that the surface of the snow is getting moist and weak. Photo: G. Antonioli
Cornices have grown large and overhang far over the edge. They are ready to break, especially with the warmer, above freezing temperatures. Photo: G. Antonioli
Forecast link: GNFAC Avalanche Forecast for Wed Mar 15, 2017GNFAC Avalanche Advisory for Thu Mar 16, 2017GNFAC Avalanche Forecast for Fri Mar 17, 2017GNFAC Avalanche Forecast for Sat Mar 18, 2017GNFAC Avalanche Advisory for Sun Mar 19, 2017GNFAC Avalanche Forecast for Mon Mar 20, 2017GNFAC Avalanche Advisory for Fri Mar 24, 2017