GNFAC Avalanche Advisory for Mon Jan 25, 2010
Snowpack and Avalanche Discussion
The Madison Range, Southern Gallatin Range and the Lionhead area near West Yellowstone:
09-10
Cracks were observed in wind affected snow just south of Bridger Bowl where they propagated very long distances. This is a clear sign of instability in the new snow. Avalanches involving the new snow can often trigger avalanches deeper in the snowpack Photo: R. Petroff
Forecast link: GNFAC Avalanche Forecast for Sat Jan 23, 2010
GNFAC Avalanche Forecast for Sat Jan 23, 2010
Snowpack and Avalanche Discussion
The Southern Gallatin and Southern Madison Ranges, and the Lionhead area near West Yellowstone:
GNFAC Avalanche Forecast for Fri Jan 22, 2010
Snowpack and Avalanche Discussion
The Madison Range, the southern Gallatin Range, and the Lionhead area near West Yellowstone:
This avalanche occured naturally on the 17th hole at the Moonlight Basin Golf Course. It's not a good sign when avalanches are occuring on golf courses. Photo S. Reznicek
GNFAC Avalanche Advisory for Fri Jan 22, 2010
Snowpack and Avalanche Discussion
The Madison Range, the southern Gallatin Range, and the Lionhead area near West Yellowstone:
GNFAC Avalanche Advisory for Thu Jan 21, 2010
Snowpack and Avalanche Discussion
The Madison Range, the southern Gallatin Range, and the Lionhead area near West Yellowstone:
When this ECT failed, instead of fracturing and sliding forward as they usually do, the block dropped 4 inches down, collapsing and crushing the very large facets underneath it. This is unique and the only time we've ever seen this happen. We think its an indicator of how weak the facets are on the ground. We had lots of collapsing and cracking as we ascended the slope. This slope was in the southern Madison Range (Henrys Lake Mountains) and 26 degrees steep. Photo by GNFAC.
GNFAC Avalanche Advisory for Wed Jan 20, 2010
Snowpack and Avalanche Discussion
The Madison Range, the southern Gallatin Range, and the Lionhead area near West Yellowstone: