Alert archive / Wisconsin / Severe Thunderstorm Warnings / 2021
Severe Thunderstorm Warnings in Wisconsin, September 2021
39 severe thunderstorm warnings in September 2021. 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 September 2021. Tap one for its archive.
- Severe Thunderstorm Warnings
- 39
- Busiest day
- September 7, 202120 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 |
|---|---|---|---|---|
| Sep 7, 3:29 AM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 31 min |
| Sep 7, 8:11 AM CDT | Severe Thunderstorm Warning | GRB | Outagamie, Waupaca | 49 min |
| Sep 7, 8:42 AM CDT | Severe Thunderstorm Warning | GRB | Brown, Outagamie | 48 min |
| Sep 7, 8:57 AM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 48 min |
| Sep 7, 9:02 AM CDT | Severe Thunderstorm Warning | GRB | Waushara, Winnebago | 43 min |
| Sep 7, 9:09 AM CDT | Severe Thunderstorm Warning | GRB | Brown, Kewaunee, Manitowoc | 36 min |
| Sep 7, 9:16 AM CDT | Severe Thunderstorm Warning | GRB | Brown, Calumet, Manitowoc, Outagamie, Winnebago | 44 min |
| Sep 7, 9:30 AM CDT | Severe Thunderstorm Warning | GRB | Calumet, Manitowoc, Winnebago | 60 min |
| Sep 7, 9:34 AM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 56 min |
| Sep 7, 10:10 AM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 50 min |
| Sep 7, 10:18 AM CDT | Severe Thunderstorm Warning | GRB | Calumet, Manitowoc | 42 min |
| Sep 7, 10:27 AM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan | 78 min |
| Sep 7, 11:01 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Dodge, Jefferson | 59 min |
| Sep 7, 11:04 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac, Ozaukee, Sheboygan, Washington | 56 min |
| Sep 7, 11:11 AM CDT | Severe Thunderstorm Warning | MKX | Green, Rock | 34 min |
| Sep 7, 11:27 AM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Ozaukee, Washington, Waukesha | 48 min |
| Sep 7, 11:42 AM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 48 min |
| Sep 7, 11:45 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Milwaukee, Waukesha | 60 min |
| Sep 7, 12:19 PM CDT | Severe Thunderstorm Warning | MKX | Racine, Walworth | 40 min |
| Sep 7, 12:30 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Rock, Walworth | 60 min |
| Sep 12, 3:42 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Washington, Waukesha | 33 min |
| Sep 12, 3:59 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Ozaukee | 33 min |
| Sep 13, 1:55 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson | 50 min |
| Sep 13, 2:15 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa | 45 min |
| Sep 13, 2:38 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Waukesha | 52 min |
| Sep 13, 2:45 AM CDT | Severe Thunderstorm Warning | MKX | Dane | 30 min |
| Sep 13, 3:34 AM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Waukesha | 41 min |
| Sep 13, 6:11 AM CDT | Severe Thunderstorm Warning | MKX | Iowa, Sauk | 28 min |
| Sep 17, 3:15 AM CDT | Severe Thunderstorm Warning | MPX | Polk, Saint Croix | 15 min |
| Sep 17, 3:30 AM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn, Polk, Saint Croix | 30 min |
| Sep 20, 5:57 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Iron, Sawyer | 63 min |
| Sep 20, 7:20 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant, Richland | 40 min |
| Sep 20, 7:22 PM CDT | Severe Thunderstorm Warning | MKX | Iowa, Sauk | 38 min |
| Sep 20, 7:41 PM CDT | Severe Thunderstorm Warning | ARX | Juneau, Monroe, Richland, Vernon | 34 min |
| Sep 20, 7:46 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Sauk | 44 min |
| Sep 20, 7:58 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 47 min |
| Sep 20, 9:21 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge | 24 min |
| Sep 20, 9:22 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa, Lafayette | 38 min |
| Sep 20, 10:41 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson | 20 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Dane County6
- Jefferson County5
- Waukesha County5
- Manitowoc County4
- Fond du Lac County4
- Dodge County4
- Milwaukee County4
- Iowa County4
- Outagamie County3
- Brown County3
- Winnebago County3
- Calumet County3
- Columbia County3
- Ozaukee County3
- Washington County3
- Rock County3
- Walworth County3
- Sauk County3
- Sawyer County2
- Sheboygan County2
- Green County2
- Racine County2
- Polk County2
- Saint Croix County2
- Richland County2
- Juneau County2
- Washburn County1
- Waupaca County1
- Green Lake County1
- Marquette County1
- Waushara County1
- Kewaunee County1
- Kenosha County1
- Barron County1
- Dunn County1
- Ashland County1
- Bayfield County1
- Iron County1
- Crawford County1
- Grant County1
4 more counties
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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. Rebuilt daily.