EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaDubuque, IA Effective8/21/2026, 4:26:00 PM CDT Expires8/21/2026, 5:30:00 PM CDT Severe Thunderstorm Warning issued...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaClay, KS; Dickinson, KS Effective8/21/2026, 4:27:00 PM CDT Expires8/21/2026, 5:00:00 PM CDT Severe Thunderstorm...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaClayton, IA Effective8/21/2026, 4:28:00 PM CDT Expires8/21/2026, 4:45:00 PM CDT Severe Thunderstorm Warning issued...
EventTornado Warning SeverityExtreme UrgencyImmediate CertaintyObserved AreaDane, WI Effective8/21/2026, 4:18:00 PM CDT Expires8/21/2026, 5:00:00 PM CDT Tornado Warning issued August 21...
EventSpecial Weather Statement SeverityModerate UrgencyExpected CertaintyObserved AreaAtchison; Leavenworth Effective8/21/2026, 4:11:00 PM CDT Expires8/21/2026, 4:45:00 PM CDT Special Weather Statement issued...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaCuster, SD; Fall River, SD Effective8/21/2026, 4:13:00 PM CDT Expires8/21/2026, 5:15:00 PM CDT Severe...
EventSpecial Weather Statement SeverityModerate UrgencyExpected CertaintyObserved AreaCloud; Ottawa Effective8/21/2026, 4:03:00 PM CDT Expires8/21/2026, 4:30:00 PM CDT Special Weather Statement issued...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaMarshall, MN; Roseau, MN Effective8/21/2026, 3:57:00 PM CDT Expires8/21/2026, 5:00:00 PM CDT Severe Thunderstorm...
EventSevere Thunderstorm Watch SeveritySevere UrgencyFuture CertaintyPossible AreaColumbia, WI Effective8/21/2026, 4:00:00 PM CDT Expires8/21/2026, 10:00:00 PM CDT Severe Thunderstorm Watch issued...
EventSpecial Weather Statement SeverityModerate UrgencyExpected CertaintyObserved AreaSouthern Foothills; Central Black Hills; Southern Black Hills; Custer Co Plains; Hermosa Foothills; Eastern...