GNFAC Avalanche Advisory for Sat Jan 15, 2011
The southern Madison and southern Gallatin Ranges, the Lionhead area near West Yellowstone, the mountains around Cooke City and the Washburn Range:
GNFAC Avalanche Advisory for Fri Jan 14, 2011
The southern Madison and southern Gallatin Ranges, the Lionhead area near West Yellowstone, the mountains around Cooke City and the Washburn Range:
GNFAC Avalanche Forecast for Thu Jan 13, 2011
The northern Madison Range:
GNFAC Avalanche Advisory for Wed Jan 12, 2011
The northern Madison Range:
GNFAC Avalanche Advisory for Tue Jan 11, 2011
The northern Madison Range:
GNFAC Avalanche Advisory for Mon Jan 10, 2011
The northern Madison Range:
The northern Madison Range, specifically the mountains around Big Sky, holds the weakest snowpack in our advisory area. The main culprit for this current designation is a layer of buried surface hoar located 2-3 feet below the surface in many areas. This layer formed over three weeks ago and has gradually gained strength. This strengthening is a trend we like to see but it does cause some stability assessment problems.
The debris was extensive and very, very dense. The crown is visible in the upper right corner of the photo. Photo: GNFAC
The debris was quite extensive given the small area the avalanche released from. The densely packed slab was thick over most of the slope adding a lot of volume to the avalanche. It slid 800-1,000 feet down the slope. Photo: GNFAC
Randy Elliott investigates the avalanche in Argentina Bowl off the south summit of Saddle Peak. Facets underlying a knife hard wind slab broke when a skier initiated the fracture from a thin spot on the slope. Photo: GNFAC
Forecast link: GNFAC Avalanche Advisory for Wed Jan 12, 2011