14-15
The new snow is creating unstable conditions in our advisory area. Eric looks at small-grained facets (stripe in the snow) at Buck Ridge where we easily got our stability test to propagate (ECTP 11). This recipe of new snow on top of weak facets or surface hoar is found throughout southwest Montana. We made a video and snowpit profile at this location. Photo: GNFAC
GNFAC Avalanche Forecast for Sun Dec 21, 2014
Gallatin Range Madison Range Lionhead area near West Yellowstone Cooke City
A stripe of weak surface hoar was obvious in the snowpack. It will be ready to produce avalanches as soon as more snow falls or the wind blows. Both are in the forecast. See the full pit profile for stability test and pit data at: http://www.mtavalanche.com/images/14/sage-basin-snowpit-profile
GNFAC Avalanche Advisory for Sat Dec 20, 2014
Bridger Range Gallatin Range Madison Range Lionhead area near West Yellowstone Cooke City
GNFAC Avalanche Advisory for Fri Dec 19, 2014
Bridger Range Gallatin Range Madison Range
Lionhead area near West Yellowstone
Forecast link: GNFAC Avalanche Advisory for Sat Dec 20, 2014