WINTER STORM WATCH late Friday through Saturday for Glacier Park, the Flathead and Mission Valleys along with the Seeley Swan area. Snowfall of 3 to 8 inches in the valleys and 8 to 16 inches in the mountains. This includes Kalispell, Polson, MacDonald and Rogers Passes.
HIGH WIND WARNING until midnight Friday for Lincoln, Helena and Norris Hill in Madison County. West winds 20 to 45 mph with gusts up to 65 mph.
AVALANCHE WARNING for the Gallatin National Forest near Bozeman.
A moist and mild Pacific flow will keep clouds rolling across the area through Friday. There is a chance of sprinkles and rain showers around Missoula and Kalispell, with more widespread rain developing Friday afternoon. An arctic cold front will begin moving into western Montana Friday night and Saturday. The rain will change to snow area wide, including Butte and Bozeman. Strong winds will accompany the front with much colder air following in its wake. Accumulating snow is likely area wide, with 3 to 6 inches and locally up to 8 inches in northwest Montana around Kalispell. We can expect 2 to 4 inches in Bozeman and 1 to 3 inches in Missoula and Butte.
Lows Thursday night in the 30s with highs Friday back to the 40s. Highs will drop to the 10s in Kalispell on Saturday with 30s elsewhere. By Saturday night, lows will fall to the single digits below 0 in Bozeman and Kalispell, above 0 in Butte to around 10 in Missoula. Highs Sunday only in the 10s. Wind chills will drop well below 0 area wide by Sunday.