Several surges of Pacific moisture will move across western Montana. Each one will bring a better chance of rain and snow. The first will move into the area by Friday afternoon. Rain and snow showers will overspread the region. A break will occur early Saturday. By evening, there will be a good chance of rain and snow. By Sunday, snow levels will have risen from 3000 feet Saturday evening to 5000 feet. After several inches of snow at the passes, even the passes will transition to rain. Outside of the precipitation, skies will be mostly cloudy. Lows Thursday night in the 20s with highs Friday in the 30s. Highs will rise to the mid 30s to mid 40s by Sunday and Monday.
Periodic valley rain and mountain snow will be possible Tuesday and Christmas Eve of next week. By Christmas Eve, the weather models are suggesting that an arctic front will bring much colder air to the area. During the transition there will be a chance of snow along with gusty winds. Highs will drop to the upper 20s and 30s Christmas Eve to the 20s Christmas Day.