BUTTE – The atmosphere is slightly unstable this afternoon and with stronger surface heating and limited moisture thunderstorms are developing right on cue. Most of the thunderstorms will be on the weaker side and only a few will be strong. Regardless, all thunderstorms this afternoon and evening could produce brief heavy rain, small hail, frequent and deadly lightning, and gusty outflow winds.
When thunderstorms threaten your area please seek shelter immediately. Wait at least 30 minutes before heading back outdoors after the thunderstorm has passed by and watch for additional storms through midnight.
City by City Forecast:
BOZEMAN: LOW: 52°; HIGH FRIDAY: 76°. Scattered early evening thunderstorms are likely for Bozeman. Friday only a slight chance for a stray afternoon thunderstorm is possible.
BUTTE: LOW: 48°; HIGH FRIDAY: 76°. Scattered thunderstorms are likely for Butte through midnight and diminish overnight. Friday look for an isolated late afternoon thunderstorm.
DILLON: LOW: 47°; HIGH FRIDAY: 76°. Scattered thunderstorms are developing again this afternoon and evening for Dillon. Most storms will weaken and diminish after sunset. Friday a few mountain rumbles are possible otherwise partly cloudy and warm.
WEST YELLOWSTONE: LOW: 38°; HIGH FRIDAY: 68°. Scattered thunderstorms will continue to impact West Yellowstone and Yellowstone National Park through the early evening hours tonight. More storms are likely for this region again Friday afternoon and evening.
