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GNFAC Avalanche Advisory for Wed Feb 1, 2012
Snowpack and Avalanche Discussion
The southern Madison and southern Gallatin Ranges, the Lionhead area near West Yellowstone and the mountains around Cooke City:
At upper elevations in the northern Gallatin Range, some slopes are scoured and some are loaded. Leeward slopes below the ridgelines will be the most likely to hold unstable snow. Photo GNFAC
Forecast link: GNFAC Avalanche Advisory for Wed Feb 1, 2012
As we skinned up the slope we got a large "whumph" and crack that propagated about 75 feet uphill. We dug into the crack and saw it was collapsing on a 1.5cm thick layer of well developed, feathery, surface hoar. This is Bulls-eye information that the snowpack is unstable. We made a video of the snowpit too: http://www.youtube.com/watch?v=NDthVJsSFjE Photo: GNFAC
GNFAC Avalanche Advisory for Tue Jan 31, 2012
Snowpack and Avalanche Discussion
The mountains around Cooke City:
GNFAC Avalanche Forecast for Mon Jan 30, 2012
Snowpack and Avalanche Discussion
The mountains around Cooke City:
This slide occurred on Mt Henderson outside of Cooke City. New snow and strong winds are continuing to push a weak layer of factes buried 2-3 feet deep past its breaking point. Photo Ben Zavora