The Storm Prediction Center has issued a Tornado Watch effective until Midnight for the following counties in Iowa, Adair, Adams, Appanoose, Audubon, Cass, Clarke, Dallas, Davis, Decatur, Guthrie, Jasper, Lucas, Madison, Mahaska, Marion, Monroe, Polk, Poweshiek, Ringgold, Taylor, Union, Wapello, Warren, Wayne, Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines, Dubuque, Henry, Iowa, Jackson, Jefferson, Johnson, Jones, Keokuk, Lee, Linn, Louisa, Muscatine, Scott, Van Buren, Washington.