MISSOULA — The warmest day of the week is expected Tuesday as highs top out in the upper 40s to middle 50s. Widespread valley fog will be possible during the morning. Once this clears expect partly to mostly cloudy skies.
A weak cold front will move through the northern Rockies Wednesday. As it does, breezy winds along with valley rain and mountain snow will develop. Temperatures will be slightly cooler Wednesday topping out in the low to upper 40s.
Cooler air will continue to move in behind this front Thursday. As highs drop into the 30s to low 40s this will allow valleys to see precipitation fall as a rain/snow mix while mountains continue to see snow. Overall, several inches of snow can be expected over those mountain passes Wednesday and Thursday while very little or no impacts will be felt in the valleys.
Looking at the end of the week and continuing into the weekend, slightly cooler but drier air looks to move into the northern Rockies. This will allow precipitation to come to an end in the valleys with just a few light snow showers sticking around in the mountains. Temperatures will cool to the middle and upper 30s Friday and continue through Saturday and Sunday.