At 1006 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from Waupun to near Lac La Belle. Movement was east at 35 mph. HAZARD...Wind gusts up to 40 mph and penny size 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... Fond Du Lac, West Bend, Mequon, Hartford, Waupun, Ripon, Jackson, Mayville, Slinger, North Fond Du Lac, Kewaskum, Horicon, Juneau, Germantown, Lomira, Campbellsport, Theresa, Hustisford, Oakfield, and Rosendale. This includes the following highways... U.S. Highway 151 between mile markers 141 and 163, and between mile markers 165 and 169. Interstate 41 between mile markers 53 and 109. U.S. Highway 45 between mile markers 61 and 73.

At 954 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from 6 miles north of Watertown to near Jefferson. Movement was east at 30 mph. HAZARD...Wind gusts up to 40 mph and penny size 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, Watertown, Pewaukee, Hartland, Jefferson, Delafield, Wales, Okauchee Lake, Oconomowoc, Ottawa, Merton, Johnson Creek, Dousman, Lac La Belle, Ixonia, Rome, Ashippun, Lebanon, Nashotah, and Waterville. This includes the following highways... Interstate 94 between mile markers 265 and 293. Wisconsin Highway 26 between mile markers 31 and 49.

* WHAT...Heat index values up to 100 expected. * WHERE...Fond du Lac, Sheboygan, Kenosha, Milwaukee, Ozaukee, Racine, Washington, and Waukesha Counties. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.