WINTER WEATHER ADVISORY through Wednesday morning for most areas west of the divide, except the Missoula and Bitterroot Valleys along with the Butte area. This advisory does includes the Kalispell and Polson area. Snowfall of 1 to 4 inches in the valleys with 4 to 9 inches in the mountains.
WINTER STORM WARNING for Lookout Pass to Haugan along I-90 where up to a foot of snow is possible.
WINTER WEATHER ADVISORY for most all other passes from Lolo and Lost Trail Passes east to Monida and Targhee Passes. This includes the West Yellowstone area. Snowfall of 4 to 9 inches is expected.