The Storm Prediction Center has issued a Severe Thunderstorm watch effective until 3am Thursday morning for the following counties, Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque, Iowa, Jackson, Johnson, Jones, Keokuk, Linn, Louisa, Muscatine, Scott, Washington, Carroll IL, Jo Daviess IL, Rock Island IL and Whiteside IL. Thunderstorms have developed across the central portions of the state this evening and are currently moving to the east. These storms will be capable of producing large hail and damaging straight line winds along with some brief heavy rain and dangerous cloud to ground lightning. These storms have already produced some wind damage earlier and they remain a threat.