At 738 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Dousman to near Palmyra to Williams Bay. Movement was northeast at 35 mph. HAZARD...Wind gusts up to 50 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Waukesha, West Allis, New Berlin, Brookfield, Greenfield, Menomonee Falls, Muskego, Pewaukee, Sussex, Elkhorn, Hartland, Delavan, Hales Corners, Lake Geneva, Mukwonago, Delafield, Elm Grove, East Troy, Williams Bay, and Wales. This includes the following highways... U.S. Highway 12 between mile markers 320 and 331. Interstate 94 between mile markers 280 and 303. Interstate 43 between mile markers 19 and 59. Interstate 41 between mile markers 50 and 52.