National Weather ServiceWisconsinSevere Thunderstorm WarningArchive to October 1, 2026
Severe Thunderstorm Warnings in Wisconsin
The National Weather Service issued 388 severe thunderstorm warnings for Wisconsin in 2025 and 343 a year on average in 2008-2025; in 2021-2025 it had the 29th most of any state. 2026 through September: 632, 87% above the average of 338 for those months in 2008-2025. Dane was covered most often (467 times since 2008).
How many severe thunderstorm warnings does Wisconsin get?
Every severe thunderstorm warning that covered part of Wisconsin. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 632 |
| 2025 | 388 |
| 2024 | 392 |
| 2023 | 302 |
| 2022 | 333 |
| 2021 | 351 |
| 2020 | 292 |
| 2019 | 271 |
| 2018 | 326 |
| 2017 | 494 |
| 2016 | 332 |
| 2015 | 225 |
| 2014 | 286 |
| 2013 | 328 |
| 2012 | 369 |
| 2011 | 492 |
| 2010 | 376 |
| 2009 | 153 |
| 2008 | 471 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Wisconsin get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in Wisconsin?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Dane | 467 | 164 | September 3, 2026 |
| Rock | 359 | 114 | August 11, 2026 |
| Dodge | 358 | 122 | September 4, 2026 |
| Columbia | 346 | 99 | August 18, 2026 |
| Jefferson | 333 | 111 | August 18, 2026 |
| Douglas | 329 | 60 | August 25, 2026 |
| Walworth | 318 | 104 | August 11, 2026 |
| Sawyer | 309 | 46 | August 26, 2026 |
| Waukesha | 309 | 104 | September 4, 2026 |
| Sauk | 283 | 79 | August 21, 2026 |
| Ashland | 279 | 47 | July 27, 2026 |
| Bayfield | 277 | 56 | July 27, 2026 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
The latest severe thunderstorm warnings for Wisconsin in AreaZine's record
NWS La CrosseWarningSeptember 4, 2026
Severe Thunderstorm Warning: Clayton and Grant, IA and WI
Expired 5:15 p.m. CDT, September 4, 2026
NWS Green BayWarningSeptember 4, 2026
Severe Thunderstorm Warning: Marathon, WI
Expired 5:15 p.m. CDT, September 4, 2026
NWS Milwaukee/SullivanWarningSeptember 4, 2026
Severe Thunderstorm Warning: Fond du Lac and Sheboygan, WI
Expired 1:45 a.m. CDT, September 4, 2026
NWS Milwaukee/SullivanWarningSeptember 3, 2026
Severe Thunderstorm Warning: Dane, Green, Iowa County and 1 more, WI
Expired 8:45 a.m. CDT, September 3, 2026
NWS Milwaukee/SullivanWarningSeptember 3, 2026
Severe Thunderstorm Warning: Milwaukee, Ozaukee, Washington County and 1 more, WI
Expired 8:45 a.m. CDT, September 3, 2026
NWS Milwaukee/SullivanWarningAugust 26, 2026
Severe Thunderstorm Warning: Iowa County, WI
Expired 3:15 a.m. CDT, August 26, 2026
NWS La CrosseWarningAugust 26, 2026
Severe Thunderstorm Warning: Crawford and Vernon, WI
Expired 2:15 a.m. CDT, August 26, 2026
NWS DuluthWarningAugust 25, 2026
Severe Thunderstorm Warning: Carlton, St. Louis and Douglas, MN and WI
Expired 6:30 p.m. CDT, August 25, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is a severe thunderstorm warning?
A severe thunderstorm warning means a storm is producing, or is about to produce, hail one inch across or larger and/or winds of 58 mph or more. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. The national record · Every warning type in Wisconsin.