EventSevere Thunderstorm Watch SeveritySevere UrgencyFuture CertaintyPossible AreaCalumet, WI; Waushara, WI; Winnebago, WI Effective8/18/2026, 2:49:00 PM CDT Expires8/18/2026, 10:00:00 PM CDT...
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EventSpecial Weather Statement SeverityModerate UrgencyExpected CertaintyObserved AreaColumbia; Dodge Effective8/18/2026, 2:44:00 PM CDT Expires8/18/2026, 3:45:00 PM CDT Special Weather Statement issued...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaMarinette, WI Effective8/18/2026, 2:44:00 PM CDT Expires8/18/2026, 3:30:00 PM CDT Severe Thunderstorm Warning issued...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaFillmore, MN; Olmsted, MN; Winona, MN Effective8/18/2026, 2:47:00 PM CDT Expires8/18/2026, 3:30:00 PM CDT...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaWinona, MN; Buffalo, WI; La Crosse, WI; Trempealeau, WI Effective8/18/2026, 2:36:00 PM CDT Expires8/18/2026,...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaClayton, IA; Grant, WI Effective8/18/2026, 2:28:00 PM CDT Expires8/18/2026, 3:30:00 PM CDT Severe Thunderstorm...
EventHeat Advisory SeverityModerate UrgencyExpected CertaintyLikely AreaBarton; Butler Effective8/18/2026, 2:15:00 PM CDT Expires8/18/2026, 8:00:00 PM CDT Heat Advisory issued August 18...
EventSevere Thunderstorm Warning SeveritySevere UrgencyImmediate CertaintyObserved AreaOlmsted, MN; Wabasha, MN Effective8/18/2026, 1:55:00 PM CDT Expires8/18/2026, 3:00:00 PM CDT Severe Thunderstorm...
EventHeat Advisory SeverityModerate UrgencyExpected CertaintyLikely AreaPawnee; Ford; Edwards; Meade Effective8/18/2026, 1:19:00 PM CDT Expires8/18/2026, 8:00:00 PM CDT Heat Advisory issued...
EventHeat Advisory SeverityModerate UrgencyExpected CertaintyLikely AreaFisher; Nolan; Haskell; Throckmorton; Jones; Shackelford; Taylor; Callahan Effective8/18/2026, 12:38:00 PM CDT Expires8/19/2026, 7:00:00 PM...