The Severe Thunderstorm watch has been extended to include the following counties until 6am Adair, Adams, Audubon, Carroll, Cass, Crawford, Greene, Guthrie, Ringgold, Taylor, Union. The Severe Thunderstorm watch has been cancelled for the following counties, Butler, Franklin, Grundy, Hamilton, Hardin, Humboldt, Marshall, Poweshiek, Tama, Webster, Wright.