WINTER STORM WARNING late Friday through Saturday for Glacier Park, the Flathead and Mission Valleys along with the Seeley Swan area. Snowfall of 3 to 6 inches in the valleys and 8 to 20 inches in the mountains. This includes Kalispell, Polson, MacDonald and Rogers Passes. Subzero wind chill is expected Saturday morning with 30 mph wind gusts with isolated areas seeing gusts over 40 mph.
WINTER WEATHER ADVISORY for the Missoula, Butte, and Bozeman areas as well as Libby, Ovando, Philipsburg, Hamilton, Garrison, Drummond, Boulder, Townsend and White Sulphur Springs. Snowfall amounts will vary between 1 and 4 inches depending on elevation for valleys and between 6 inches and a foot of snow in many mountainous areas.
Friday night arctic air pushes south into the Kalispell area. Rain will quickly turn to snow with windy conditions and plummeting temperatures. The front will reach Missoula by mid day Saturday and the Butte and Bozeman areas during the afternoon. If you're attending either playoff game in Missoula or Bozeman, prepare for a mix of rain and snow changing to snow with increasing winds and falling temperatures.
Lows Friday night falling to the 10s in Kalispell, but remaining in the 30s in Missoula, Butte and Bozeman. Highs Saturday in the 10s in Kalispell and the 30s elsewhere with falling temperatures in the afternoon. Winds up to 30 and 40 mph will drop wind chills well below zero by Saturday night and Sunday. Actual lows Sunday morning will be in the single digits above to below zero. Highs Sunday in the 10s.
A chance of snow Monday with highs warming back to the 20s to lower 30s.