If outdoors, consider seeking shelter inside a building.

At 1126 PM CDT, Doppler radar was tracking a strong thunderstorm near Waverly, moving northeast at 20 mph. HAZARD...Half inch hail and additional rainfall up to one inch. SOURCE...Radar indicated. IMPACT...Minor hail damage to vegetation is possible. Ponding of water on roadways, low visibilities, and rises in small streams and creeks. Locations impacted include... Waverly, Sumner, Tripoli, Shell Rock, Janesville, Frederika, and Waverly Municipal Airport.