GNFAC Avalanche Advisory for Thu Dec 6, 2012
Snowpack and Avalanche Discussion
12-13
We found a layer of buried surface hoar in Sage Basin of the Taylor Fork area in the southern Madison Range on a NE facing slope at 9000 ft. It could easily produce an avalanche and it produced unstable results in stability tests (ECTP12). Unfortunately it does not exist everywhere and we do not yet have a good sense of its distribution; however, it does not seem to exist on slopes that have experienced any amount of wind. Photo: GNFAC
GNFAC Avalanche Advisory for Wed Dec 5, 2012
Snowpack and Avalanche Discussion
GNFAC Avalanche Advisory for Tue Dec 4, 2012
Snowpack and Avalanche Discussion
Northern Madison, 2012-12-04
This pit was dug on the flanks of a slide in the 2nd Yellowmule. Strong winds and recent snow heavily loaded north facing slopes. Weak snow near the ground is struggling to support the most recent load. Photo GNFAC
The slide was triggered not far from the rider in this photo. It's at the entrance to the 2nd Yellowmule. This slope was heavily wind loaded during the most recent storm. Weak snow at the ground could not support the load. Photo GNFAC
This slide was remotely triggered and propagated over 200 meters wide. The slope is northeast facing around 9,000 ft. This event is a clear indication weak snow at the ground is struggeling to support the new load. Shady, upper elevation slopes are the most likely to hold weak snow. Photo GNFAC
GNFAC Avalanche Advisory for Mon Dec 3, 2012
Snowpack and Avalanche Discussion
Cooke City Southern Madison Range Southern Gallatin Range
Lionhead
Forecast link: GNFAC Avalanche Advisory for Mon Dec 3, 2012