The Storm Prediction Prediction Center has issued Severe Thunderstorm Watch #224 for Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll, Cass, Cerro Gordo, Cherokee, Clay, Crawford, Dickinson, Emmet, Franklin, Fremont, Greene Guthrie, Hamilton, Hancock, Harrison, Humboldt, Ida, Kossuth, Mills, Monona, Montgomery, O’Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Pottawattamie, Sac, Shelby, Sioux, Webster, Winnebago, Woodbury, Worth, and Wright counties until 2AM tomorrow.