At 426 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from 9 miles southwest of Gowrie to 8 miles northeast of Jefferson to 4 miles northeast of Perry. Movement was east at 40 mph. HAZARD...Wind gusts up to 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Boone, Madrid, Ogden, Gowrie, Boone Speedway, Dayton, Grand Junction, Churdan, Sheldahl, Harcourt, Rippey, Paton, Boxholm, Pilot Mound, Luther, Fraser, Dana, Beaver, Berkley, and Boone Municipal Airport.