The National Weather Service in Great Falls says that at 11:21 p.m. on Wednesday, radar indicated strong thunderstorms were located along a line extending from 13 miles west of Choteau to near Fort Shaw to 22 miles southeast of Cascade. Movement was northeast at 35 mph.
Winds in excess of 40 mph and brief heavy rain are expected from all of these storms, but half inch hail is also possible from the storms northwest of Great Falls.
Locations impacted include…Great Falls, Conrad, Choteau, Fairfield, Belt, Dutton, Fort Shaw, Brady, Black Eagle, Fort Shaw, Power, Floweree, Eden, Stockett, FirstPeoples Buffalo Jump State Park, Ulm, Portage, Sluice Boxes State Park, Malmstrom Afb and Tracy.
People leaving the Montana State Fair in Great Falls are in the path of these storms and should prepare for the expected weather conditions. Wind gusts of 40 mph have already been reported at the Great Falls International Airport.
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle.