A westerly, moist and relatively mild Pacific flow will bring clouds and shower chances to western Montana. A few light rain or snow showers are possible today, mainly along and north of I-90 from Missoula to Kalispell. Most of the precipitation will be confined to the mountains. Skies will be partly cloudy around Butte and Bozeman. Temperatures will remain near normal with highs in the 30s.
A stronger wave of moisture will bring a better chance a few rain and snow showers area wide Friday. The best chance of showers will occur this weekend. A strong push of mild and moist air will bring valley rain and high mountain snow Saturday night through Monday. Snow levels will rise, but not before several inches fall in the higher elevations.
Right now weather models are suggesting arctic air to invade the region Christmas Eve and Christmas day, with much colder temperatures and a chance of snow.