EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaCorson, SD Effective8/17/2026, 5:32:00 PM CDT Expires8/17/2026, 6:15:00 PM CDT Severe Thunderstorm Warning issued...
Forecasts
SPC Day 1/2/3 outlooks, convective outlooks
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaCass, MN; Itasca, MN; St. Louis, MN Effective8/17/2026, 5:22:00 PM CDT Expires8/17/2026, 6:15:00 PM...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaJohnston, OK Effective8/17/2026, 5:24:00 PM CDT Expires8/17/2026, 6:15:00 PM CDT Severe Thunderstorm Warning issued...
EventSpecial Weather Statement SeverityModerate UrgencyExpected CertaintyObserved AreaDawes; Box Butte Effective8/17/2026, 5:26:00 PM CDT Expires8/17/2026, 6:00:00 PM CDT Special Weather Statement...
EventSpecial Weather Statement SeverityModerate UrgencyExpected CertaintyObserved AreaJohnston Effective8/17/2026, 5:09:00 PM CDT Expires8/17/2026, 5:45:00 PM CDT Special Weather Statement issued August...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaOtter Tail, MN; Wadena, MN Effective8/17/2026, 5:04:00 PM CDT Expires8/17/2026, 6:00:00 PM CDT Severe...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaFall River, SD Effective8/17/2026, 5:05:00 PM CDT Expires8/17/2026, 6:00:00 PM CDT Severe Thunderstorm Warning...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaPerkins, SD Effective8/17/2026, 4:59:00 PM CDT Expires8/17/2026, 6:00:00 PM CDT Severe Thunderstorm Warning issued...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaHaakon, SD; Ziebach, SD Effective8/17/2026, 4:49:00 PM CDT Expires8/17/2026, 6:00:00 PM CDT Severe Thunderstorm...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaDewey, SD; Stanley, SD; Sully, SD Effective8/17/2026, 4:52:00 PM CDT Expires8/17/2026, 5:45:00 PM CDT...