Alert archive / Wisconsin / Severe Thunderstorm Warnings / 2026
Severe Thunderstorm Warnings in Wisconsin, August 2026
58 severe thunderstorm warnings in August 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in August 2026. Tap one for its archive.
- Severe Thunderstorm Warnings
- 58
- Busiest day
- August 18, 202617 severe thunderstorm warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 6:04 AM CDT | Severe Thunderstorm Warning | ARX | Buffalo, Trempealeau | 41 min |
| Aug 9, 7:41 AM CDT | Severe Thunderstorm Warning | ARX | Juneau, Monroe | 34 min |
| Aug 9, 9:00 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Green Lake, Marquette, Sauk | 45 min |
| Aug 9, 9:28 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Green Lake | 47 min |
| Aug 9, 9:45 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane | 45 min |
| Aug 9, 9:52 AM CDT | Severe Thunderstorm Warning | MKX | Dodge | 53 min |
| Aug 9, 10:19 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Jefferson | 41 min |
| Aug 9, 10:35 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson | 40 min |
| Aug 9, 11:03 AM CDT | Severe Thunderstorm Warning | MKX | Racine, Walworth, Waukesha | 27 min |
| Aug 9, 11:10 AM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Waukesha | 50 min |
| Aug 9, 11:28 AM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Walworth | 47 min |
| Aug 9, 10:50 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Walworth | 40 min |
| Aug 9, 11:49 PM CDT | Severe Thunderstorm Warning | MKX | Racine, Waukesha | 26 min |
| Aug 11, 2:41 AM CDT | Severe Thunderstorm Warning | MKX | Green, Rock | 18 min |
| Aug 11, 3:02 AM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 28 min |
| Aug 11, 7:37 AM CDT | Severe Thunderstorm Warning | ARX | Grant | 54 min |
| Aug 11, 8:47 AM CDT | Severe Thunderstorm Warning | MKX | Green, Lafayette | 52 min |
| Aug 11, 10:43 PM CDT | Severe Thunderstorm Warning | GRB | Marathon | 62 min |
| Aug 11, 11:26 PM CDT | Severe Thunderstorm Warning | GRB | Marathon, Portage, Wood | 64 min |
| Aug 12, 12:21 AM CDT | Severe Thunderstorm Warning | ARX | Clark | 9 min |
| Aug 12, 12:22 AM CDT | Severe Thunderstorm Warning | GRB | Wood | 38 min |
| Aug 12, 12:27 AM CDT | Severe Thunderstorm Warning | GRB | Marathon | 46 min |
| Aug 12, 12:34 AM CDT | Severe Thunderstorm Warning | GRB | Portage, Wood | 56 min |
| Aug 12, 1:05 AM CDT | Severe Thunderstorm Warning | GRB | Langlade, Marathon, Menominee, Shawano | 40 min |
| Aug 12, 1:20 AM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 25 min |
| Aug 12, 1:45 AM CDT | Severe Thunderstorm Warning | ARX | Adams | 26 min |
| Aug 12, 2:07 AM CDT | Severe Thunderstorm Warning | GRB | Menominee, Oconto | 53 min |
| Aug 12, 2:48 AM CDT | Severe Thunderstorm Warning | GRB | Marinette, Oconto | 42 min |
| Aug 18, 2:28 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 46 min |
| Aug 18, 2:36 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo, La Crosse, Trempealeau | 39 min |
| Aug 18, 2:44 PM CDT | Severe Thunderstorm Warning | GRB | Marinette | 33 min |
| Aug 18, 3:03 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Vernon | 57 min |
| Aug 18, 3:54 PM CDT | Severe Thunderstorm Warning | ARX | Juneau, Monroe, Richland, Vernon | 66 min |
| Aug 18, 3:55 PM CDT | Severe Thunderstorm Warning | GRB | Waushara | 49 min |
| Aug 18, 3:57 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Sauk | 78 min |
| Aug 18, 3:59 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 76 min |
| Aug 18, 4:52 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan | 38 min |
| Aug 18, 4:56 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac | 49 min |
| Aug 18, 5:08 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Sauk | 52 min |
| Aug 18, 5:16 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 33 min |
| Aug 18, 5:27 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac, Sheboygan, Washington | 63 min |
| Aug 18, 5:42 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Dodge, Jefferson | 63 min |
| Aug 18, 5:54 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Washington | 36 min |
| Aug 18, 6:23 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Dodge, Jefferson, Milwaukee, Ozaukee, Washington and 1 more | 67 min |
| Aug 18, 6:54 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Racine, Waukesha | 51 min |
| Aug 21, 2:30 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant | 46 min |
| Aug 21, 3:23 PM CDT | Severe Thunderstorm Warning | MKX | Iowa, Sauk | 52 min |
| Aug 21, 3:54 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa | 66 min |
| Aug 21, 6:40 PM CDT | Severe Thunderstorm Warning | GRB | Outagamie, Waupaca | 45 min |
| Aug 21, 7:03 PM CDT | Severe Thunderstorm Warning | GRB | Waushara, Winnebago | 29 min |
| Aug 25, 5:23 PM CDT | Severe Thunderstorm Warning | DLH | Douglas | 67 min |
| Aug 25, 5:52 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Douglas, Washburn | 53 min |
| Aug 25, 6:38 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Douglas, Washburn | 67 min |
| Aug 25, 7:48 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 57 min |
| Aug 26, 1:29 AM CDT | Severe Thunderstorm Warning | ARX | Crawford, Vernon | 34 min |
| Aug 26, 1:50 AM CDT | Severe Thunderstorm Warning | ARX | Richland | 40 min |
| Aug 26, 2:28 AM CDT | Severe Thunderstorm Warning | MKX | Iowa | 47 min |
| Aug 26, 2:29 AM CDT | Severe Thunderstorm Warning | ARX | Grant, Richland | 16 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Dodge County7
- Columbia County6
- Dane County5
- Racine County5
- Waukesha County5
- Sauk County4
- Jefferson County4
- Walworth County4
- Grant County4
- Marathon County4
- Fond du Lac County4
- Juneau County3
- Green Lake County3
- Milwaukee County3
- Wood County3
- Vernon County3
- Richland County3
- Washington County3
- Iowa County3
- Douglas County3
- Washburn County3
- Buffalo County2
- Trempealeau County2
- Monroe County2
- Marquette County2
- Kenosha County2
- Green County2
- Rock County2
- Portage County2
- Menominee County2
- Adams County2
- Oconto County2
- Marinette County2
- La Crosse County2
- Waushara County2
- Sheboygan County2
- Crawford County2
- Burnett County2
- Lafayette County1
- Clark County1
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.