Thunderstorms are expected to develop late this afternoon over northern Iowa, generally between Interstate 80 to Highway 20. Heavy rain is likely with these storms where a widespread 0.50 to 2.00 inches are anticipated with a few localized areas possibly receiving over 3 inches by Tuesday morning. The rainfall rates of 1 to 3 inches per hour are possible at times and the rain may last for a long period over the same location. This could lead to areas of flash flooding by tonight into Tuesday morning. More thunderstorms with heavy rain are anticipated over portions of central to southern Iowa Tuesday into Wednesday and again Wednesday night into Thursday. Finally, a dry period is anticipated by late Friday across the state.