AVALANCHE WARNING
ISSUED ON DECEMBER 13 2009 AT 5 am
The Gallatin National Forest Avalanche Center is issuing a Backcountry Avalanche Warning for the southern Gallatin and southern Madison Ranges, the Lionhead area near West Yellowstone, the mountains around Cooke City and the Washburn Range in northern Yellowstone National Park. New snow over the last 24 hours was deposited on an extremely weak snowpack. Today the avalanche danger is HIGH on all slopes. Areas of unstable snow exist. Natural and human triggered avalanches are likely. Avalanche terrain including avalanche runout zones should be avoided.
You are urged to call the Gallatin National Forest Avalanche Advisory for more detailed information at 406-587-6981 or log onto their website at www.mtavalanche.com
This warning will either be terminated or updated by 6:30 AM on December 14, 2009