BUTTE – SW flow is a little unstable today with thunderstorms developing this afternoon into the early evening hours tonight. These thunderstorms should be weak and short-lived but some could produce brief heavy rain, small hail and, gusty winds.
Wednesday more showers and thunderstorms are likely for SW Montana as a cold front approaches from the west by afternoon. Thunderstorms could be more widespread Wednesday afternoon and some could be a little stronger. So please be ready to seek shelter if you see threatening storm clouds Wednesday.
A bigger weather pattern change is coming by Thursday. A slow deep upper-level trough will sit over the western U.S. and produce a cool and wet weather pattern for most of Montana through next week.
City by City Forecast:
BOZEMAN: LOW: 47°; HIGH TUESDAY: 71°. Isolated afternoon thunderstorms today with partly cloudy skies overnight. Wednesday will be a better day for late day thunderstorms over Bozeman.
BUTTE: LOW: 43°; HIGH TUESDAY: 66°. A few showers and isolated rumbles this afternoon for Butte. Overnight mostly cloudy with scattered showers and a few afternoon thunderstorms Wednesday.
DILLON: LOW: 45°; HIGH TUESDAY: 73°. Mostly cloudy this afternoon with a few weak thunderstorms producing brief heavy rain and small hail. Storms should diminish after sunset. Wednesday look for more widespread showers and thunderstorms by afternoon.
WEST YELLOWSTONE: LOW: 35°; HIGH TUESDAY: 66°. Mostly cloudy tonight with a few isolated showers and weak rumbles. Wednesday more clouds, showers and afternoon thunderstorms are likely.