09-10
GNFAC Avalanche Advisory for Fri Apr 9, 2010
Snowpack and Avalanche Discussion
Wet Snow Avalanche Danger
This morning's cold temperatures and strong winds today should limit significant warming and wet snow avalanche activity. However, intense solar radiation this time of year can drastically change snow conditions in a matter of hours. With new snow and sunshine, the wet snow avalanche danger could rise to MODERATE this afternoon on all slopes with direct exposure to the sun.
Wind gusts reached 96 mph at the Yellowstone Club on Thursday, April 8th, and Lone Peak was not immune. Even with winds this strong, wind-loading was evident and on Friday numerous deep avalanches occurred in the backcountry on Cedar and Fan Mountains. Photo: Jay Moore
GNFAC Avalanche Forecast for Thu Apr 8, 2010
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:
GNFAC Avalanche Advisory for Wed Apr 7, 2010
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:
GNFAC Avalanche Forecast for Tue Apr 6, 2010
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:
This avalanche occured on north facing slopes near 9800ft outside the advisory area in the Absaroka Range. It was triggered as skiers jumped on the snow at the ridge top. They estimated depth to be 2-3 ft and the total width to be over 1000ft with a powder cloud that dusted the entire bowl. Fractures propagating over these long distances indicate the existence of a very sensitive weak layer stressed by recent snow and unstable conditions.
Three seperate avalanche crowns can be seen in this photo taken on Sunday, April 4, 2010. Recent avalanche activity is the #1 sign of unstable conditions on nearby slopes where skiing is not recommended.
GNFAC Avalanche Forecast for Mon Apr 5, 2010
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:
GNFAC Avalanche Forecast for Sun Apr 4, 2010
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: