Calm conditions remain around western Montana until the beginning of Sunday afternoon, when thunderstorms will begin to form ahead of a cold front pushing into the area. Storms will begin in the Kalispell area and move south through Missoula, reaching the Butte area around sunset. A few rumbles of thunder will be possible Sunday night around Bozeman.
Temperatures on Sunday begin in the 30s and work into the mid 60s to low 70s.
Memorial Day will be cooler with highs in the 50s and 60s. However, the track of the storm system that will be in the area has changed. We expect more sunshine and very little weather issues on Monday, outside of a few light showers around Kalispell and Bozeman.
This also means Tuesday's forecast looks a lot sunnier, and that means we're forecasting temperatures to be even warmer late in the week than in our previous forecasts. Under warm, dry air and sunny skies, expect highs to climb into the middle, even upper 80s by Friday. There is a realistic chance to see our first 90 degree reading in Montana this year.