08-09
GNFAC Avalanche Forecast for Sun Apr 5, 2009
Snowpack and Avalanche Discussion
The Bridger, Gallatin and Madison Ranges, the Lionhead area near West Yellowstone, the mountains around Cooke City and the Washburn Range:
Over the next three days the sun will be Public Enemy #1 as far as the snowpack is concerned. More specifically, above freezing temperatures and calm air coupled with direct solar radiation will quickly spike the avalanche danger as the snow surface gets wet.
GNFAC Avalanche Forecast for Fri Apr 3, 2009
Snowpack and Avalanche Discussion
The Bridger, Gallatin and Madison Ranges, and the Lionhead area near West Yellowstone:
GNFAC Avalanche Forecast for Wed Apr 1, 2009
Snowpack and Avalanche Discussion
The Bridger, Gallatin and Madison Ranges, and the Lionhead area near West Yellowstone:
GNFAC Avalanche Advisory for Mon Mar 30, 2009
Snowpack and Avalanche Discussion
The Bridger, Gallatin and Madison Ranges, and the Lionhead area near West Yellowstone: Today isn’t a real brain teaser when it comes to the avalanche danger. It’s going to be bad out there for a few simple reasons. It snowed. A lot. And it was windy too. And if that isn’t bad enough, it fell onto a snowpack that was avalanching BEFORE this storm. Last week natural and human triggered avalanche activity in the Bridgers, northern Gallatins and Madisons all ran on a layer of faceted snow two feet off the ground.
GNFAC Avalanche Forecast for Sun Mar 29, 2009
Snowpack and Avalanche Discussion
The Bridger, Gallatin and Madison Ranges, and the Lionhead area near West Yellowstone:
Skiers initiated this fracture on a slope with a thin snowpack just outside the advisory area and south of Livingston. They wisely skied this 30 degree slope for their first run because the fracture propagated to an adjacent slope and caused an avalanche
Forecast link: GNFAC Avalanche Forecast for Fri Apr 3, 2009