Avalanche warnings in effect for Western Montana backcountry The Flathead and West-Central Montana avalanche centers have both issued a warning for the backcountry, listing avalanche danger as high. and last updated 2021-01-13 19:40:55-05 MISSOULA â The Flathead and West-Central Montana avalanche centers have both issued a warning for the backcountry, listing avalanche danger as high. A powerful and very wet Pacific weather system has been the catalyst for multiple avalanche warnings across western Montana. Flathead Avalanche Center Avalanche Specialist Clancy Nelson says weather conditions have led to dangerous conditions in northwest Montana. âWe got rapid loading since yesterday morning with over two inches of water at a lot of our weather stations. Snowpacks are really bad at adapting to rapid change.â