The Storm Prediction Center has issued a Severe Thunderstorm watch effective until 2am Saturday morning for the following counties, Bremer, Butler, Cerro Gordo, Franklin, Hamilton, Hancock, Hardin, Humboldt, Kossuth, Webster, Winnebago, Worth, Wright, Allamakee, Chickasaw, Floyd, Howard, Mitchell and Winneshiek. Storms have developed along the cold front moving into the western and northwestern counties of the state. The main threats from these storms will be from large hail and strong damaging wind gusts.