Alert archive / Wisconsin / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Wisconsin, 2020
292 severe thunderstorm warnings in 2020. 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 2020. Tap one for its archive.
- Severe Thunderstorm Warnings
- 292
- Busiest month
- July103 severe thunderstorm warnings
- Busiest day
- August 25, 202032 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
161 of 292 severe thunderstorm warnings covering Wisconsin in 2020 had a qualifying storm report inside them; 393 of 546 hail, wind and damage reports fell inside a warning, on average 23 minutes after it went out.
Wisconsin, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 292 | 161 | 45% | 546 | 72% | 23 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Green Bay, WI: severe thunderstorm warnings | 80 | 38 | 53% | 110 | 72% | 23 min |
| NWS Milwaukee, WI: severe thunderstorm warnings | 92 | 54 | 41% | 214 | 78% | 26 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 194 | 98 | 49% | 328 | 70% | 20 min |
| NWS La Crosse, WI: severe thunderstorm warnings | 99 | 48 | 52% | 182 | 70% | 22 min |
| NWS Duluth, MN: severe thunderstorm warnings | 126 | 64 | 49% | 232 | 64% | 19 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 |
|---|---|---|---|---|
| Mar 28, 7:29 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant | 46 min |
| Mar 28, 8:40 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 22 min |
| Apr 7, 8:30 AM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 30 min |
| Apr 7, 9:13 AM CDT | Severe Thunderstorm Warning | MPX | Rusk | 47 min |
| Apr 7, 9:39 AM CDT | Severe Thunderstorm Warning | DLH | Price | 51 min |
| Apr 7, 9:43 AM CDT | Severe Thunderstorm Warning | ARX | Taylor | 47 min |
| Apr 7, 10:17 AM CDT | Severe Thunderstorm Warning | GRB | Lincoln | 43 min |
| Apr 7, 2:34 PM CDT | Severe Thunderstorm Warning | GRB | Oconto | 26 min |
| Apr 7, 2:48 PM CDT | Severe Thunderstorm Warning | GRB | Door, Kewaunee | 42 min |
| Apr 7, 3:10 PM CDT | Severe Thunderstorm Warning | GRB | Door | 24 min |
| Apr 7, 3:27 PM CDT | Severe Thunderstorm Warning | GRB | Door | 16 min |
| Apr 7, 3:40 PM CDT | Severe Thunderstorm Warning | MKX | Ozaukee, Washington | 35 min |
| Apr 7, 4:06 PM CDT | Severe Thunderstorm Warning | MKX | Ozaukee | 24 min |
| Apr 7, 5:06 PM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 39 min |
| Apr 7, 5:26 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee | 18 min |
| Apr 7, 5:40 PM CDT | Severe Thunderstorm Warning | MKX | Green, Lafayette | 50 min |
| Apr 7, 6:16 PM CDT | Severe Thunderstorm Warning | MKX | Green | 24 min |
| Apr 20, 6:58 PM CDT | Severe Thunderstorm Warning | GRB | Menominee, Outagamie, Portage, Shawano, Waupaca, Waushara and 1 more | 47 min |
| Apr 20, 7:04 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 56 min |
| Apr 20, 7:37 PM CDT | Severe Thunderstorm Warning | GRB | Brown, Calumet, Kewaunee, Manitowoc, Outagamie, Winnebago | 56 min |
| Apr 20, 9:35 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Racine | 25 min |
| Apr 22, 3:43 PM CDT | Severe Thunderstorm Warning | ARX | Crawford | 32 min |
| May 23, 3:23 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 52 min |
| May 23, 4:28 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 47 min |
| May 25, 8:21 AM CDT | Severe Thunderstorm Warning | ARX | Buffalo | 39 min |
| May 25, 8:25 AM CDT | Severe Thunderstorm Warning | MPX | Pepin, Pierce | 35 min |
| May 25, 8:56 AM CDT | Severe Thunderstorm Warning | MPX | Dunn, Pepin | 34 min |
| May 25, 10:01 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Eau Claire | 29 min |
| May 25, 3:07 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln | 36 min |
| May 25, 3:49 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Oneida | 56 min |
| May 25, 7:25 PM CDT | Severe Thunderstorm Warning | GRB | Florence, Marinette | 27 min |
| May 26, 4:33 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn | 57 min |
| May 26, 6:50 PM CDT | Severe Thunderstorm Warning | MKX | Green | 40 min |
| Jun 2, 5:18 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo, La Crosse, Trempealeau | 42 min |
| Jun 2, 5:31 PM CDT | Severe Thunderstorm Warning | ARX | Jackson | 44 min |
| Jun 2, 5:31 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 44 min |
| Jun 2, 5:35 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Jackson, Trempealeau | 40 min |
| Jun 2, 5:52 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, Trempealeau | 38 min |
| Jun 2, 5:58 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Trempealeau | 47 min |
| Jun 2, 5:59 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, Trempealeau | 31 min |
| Jun 2, 6:07 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo, Trempealeau | 23 min |
| Jun 2, 6:09 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Jackson | 39 min |
| Jun 2, 6:11 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 49 min |
| Jun 2, 6:25 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, Juneau, La Crosse, Monroe, Trempealeau | 50 min |
| Jun 2, 6:32 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Monroe, Trempealeau, Vernon | 43 min |
| Jun 2, 6:42 PM CDT | Severe Thunderstorm Warning | GRB | Portage, Waupaca, Waushara | 63 min |
| Jun 2, 6:44 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 46 min |
| Jun 2, 6:59 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau, Richland, Vernon | 61 min |
| Jun 2, 7:06 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Marquette, Sauk | 54 min |
| Jun 2, 7:07 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Vernon | 53 min |
| Jun 2, 7:12 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 63 min |
| Jun 2, 7:24 PM CDT | Severe Thunderstorm Warning | GRB | Waushara, Winnebago | 66 min |
| Jun 2, 7:51 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 39 min |
| Jun 2, 7:57 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge, Waukesha | 63 min |
| Jun 2, 8:03 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge, Fond du Lac, Green Lake | 57 min |
| Jun 2, 8:06 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa | 54 min |
| Jun 2, 8:12 PM CDT | Severe Thunderstorm Warning | GRB | Calumet, Winnebago | 48 min |
| Jun 2, 8:27 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan | 63 min |
| Jun 2, 8:37 PM CDT | Severe Thunderstorm Warning | GRB | Brown, Calumet, Kewaunee, Manitowoc | 68 min |
| Jun 2, 8:44 PM CDT | Severe Thunderstorm Warning | MKX | Ozaukee, Washington | 61 min |
| Jun 2, 9:26 PM CDT | Severe Thunderstorm Warning | MKX | Sheboygan | 19 min |
| Jun 10, 1:22 PM CDT | Severe Thunderstorm Warning | MKX | Washington, Waukesha | 38 min |
| Jun 11, 3:04 PM CDT | Severe Thunderstorm Warning | GRB | Brown, Kewaunee, Manitowoc | 41 min |
| Jun 11, 4:38 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Waukesha | 37 min |
| Jun 11, 5:12 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Racine, Waukesha | 37 min |
| Jun 20, 12:10 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee | 26 min |
| Jun 20, 4:44 PM CDT | Severe Thunderstorm Warning | GRB | Winnebago | 35 min |
| Jun 20, 5:17 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Ozaukee, Sheboygan, Washington | 28 min |
| Jun 20, 5:49 PM CDT | Severe Thunderstorm Warning | GRB | Calumet, Winnebago | 26 min |
| Jun 21, 2:54 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 36 min |
| Jun 21, 3:02 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas | 28 min |
| Jun 21, 3:32 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Sawyer | 28 min |
| Jun 21, 3:54 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Price, Sawyer | 51 min |
| Jun 21, 7:37 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 38 min |
| Jun 26, 3:34 AM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant | 28 min |
| Jun 26, 3:14 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 46 min |
| Jun 26, 4:45 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa, Sauk | 45 min |
| Jun 28, 9:50 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Dunn | 25 min |
| Jun 29, 12:45 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Iowa, Sauk | 45 min |
| Jun 29, 1:35 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Rock | 40 min |
| Jun 29, 2:11 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Jefferson | 64 min |
| Jun 29, 2:48 PM CDT | Severe Thunderstorm Warning | GRB | Waushara, Winnebago | 25 min |
| Jul 5, 1:57 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield | 33 min |
| Jul 5, 4:35 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield | 40 min |
| Jul 5, 5:06 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas | 39 min |
| Jul 5, 5:37 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Douglas | 24 min |
| Jul 5, 5:40 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer | 25 min |
| Jul 5, 7:28 PM CDT | Severe Thunderstorm Warning | DLH | Douglas | 19 min |
| Jul 6, 3:08 PM CDT | Severe Thunderstorm Warning | GRB | Brown, Manitowoc | 20 min |
| Jul 6, 4:54 PM CDT | Severe Thunderstorm Warning | GRB | Marathon | 66 min |
| Jul 6, 5:24 PM CDT | Severe Thunderstorm Warning | GRB | Forest, Langlade, Lincoln, Oneida | 28 min |
| Jul 6, 5:30 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Marathon, Shawano | 30 min |
| Jul 6, 5:50 PM CDT | Severe Thunderstorm Warning | GRB | Forest | 40 min |
| Jul 6, 5:56 PM CDT | Severe Thunderstorm Warning | GRB | Oneida | 34 min |
| Jul 6, 7:07 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Monroe | 38 min |
| Jul 6, 8:27 PM CDT | Severe Thunderstorm Warning | GRB | Waushara | 48 min |
| Jul 7, 1:34 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse | 26 min |
| Jul 7, 4:17 PM CDT | Severe Thunderstorm Warning | MKX | Iowa | 58 min |
| Jul 7, 4:42 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa | 63 min |
| Jul 7, 4:54 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 37 min |
| Jul 7, 5:29 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson | 31 min |
| Jul 8, 6:53 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas | 52 min |
| Jul 8, 6:58 PM CDT | Severe Thunderstorm Warning | DLH | Douglas | 47 min |
| Jul 8, 7:59 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 46 min |
| Jul 8, 8:03 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas, Sawyer | 42 min |
| Jul 8, 9:18 PM CDT | Severe Thunderstorm Warning | DLH | Iron | 42 min |
| Jul 8, 9:34 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron, Price | 41 min |
| Jul 8, 9:42 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas | 33 min |
| Jul 8, 9:56 PM CDT | Severe Thunderstorm Warning | GRB | Vilas | 64 min |
| Jul 8, 10:06 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Douglas, Sawyer, Washburn | 24 min |
| Jul 8, 10:27 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Iron, Price, Sawyer | 63 min |
| Jul 8, 11:16 PM CDT | Severe Thunderstorm Warning | GRB | Oneida, Vilas | 44 min |
| Jul 9, 1:03 AM CDT | Severe Thunderstorm Warning | GRB | Florence, Marinette | 42 min |
| Jul 9, 3:16 AM CDT | Severe Thunderstorm Warning | DLH | Douglas | 29 min |
| Jul 9, 5:38 AM CDT | Severe Thunderstorm Warning | MPX | Pierce, Saint Croix | 24 min |
| Jul 9, 5:51 AM CDT | Severe Thunderstorm Warning | MPX | Saint Croix | 13 min |
| Jul 9, 6:04 AM CDT | Severe Thunderstorm Warning | MPX | Polk, Saint Croix | 14 min |
| Jul 9, 2:17 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 23 min |
| Jul 9, 2:29 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Vernon | 61 min |
| Jul 9, 3:08 PM CDT | Severe Thunderstorm Warning | MKX | Ozaukee, Sheboygan, Washington | 36 min |
| Jul 9, 4:21 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 39 min |
| Jul 9, 4:28 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa, Sauk | 47 min |
| Jul 9, 4:55 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Iowa, Marquette, Sauk | 50 min |
| Jul 9, 5:23 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Dodge | 40 min |
| Jul 9, 6:31 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Rock, Walworth, Waukesha | 44 min |
| Jul 9, 6:52 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Milwaukee, Racine, Walworth, Waukesha | 53 min |
| Jul 9, 6:59 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Jefferson, Washington, Waukesha | 46 min |
| Jul 9, 7:24 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Milwaukee, Ozaukee, Washington, Waukesha | 66 min |
| Jul 9, 7:53 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac, Ozaukee, Sheboygan, Washington | 47 min |
| Jul 11, 7:33 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 29 min |
| Jul 11, 7:35 PM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 40 min |
| Jul 14, 4:10 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 35 min |
| Jul 14, 4:14 PM CDT | Severe Thunderstorm Warning | ARX | Clark | 61 min |
| Jul 14, 5:07 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Jackson | 68 min |
| Jul 14, 7:24 PM CDT | Severe Thunderstorm Warning | GRB | Marathon, Portage, Wood | 33 min |
| Jul 14, 10:13 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa, Sauk | 30 min |
| Jul 15, 1:43 AM CDT | Severe Thunderstorm Warning | MKX | Green, Rock | 19 min |
| Jul 18, 4:15 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Eau Claire | 29 min |
| Jul 18, 4:47 AM CDT | Severe Thunderstorm Warning | GRB | Forest, Lincoln, Oneida | 29 min |
| Jul 18, 5:19 AM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Marathon | 26 min |
| Jul 18, 5:53 AM CDT | Severe Thunderstorm Warning | GRB | Forest, Langlade, Menominee, Oconto, Shawano | 52 min |
| Jul 18, 6:11 AM CDT | Severe Thunderstorm Warning | GRB | Marinette, Oconto | 64 min |
| Jul 18, 7:13 AM CDT | Severe Thunderstorm Warning | GRB | Door, Kewaunee | 47 min |
| Jul 18, 11:01 AM CDT | Severe Thunderstorm Warning | MKX | Green, Lafayette | 32 min |
| Jul 18, 12:57 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Racine | 18 min |
| Jul 18, 6:35 PM CDT | Severe Thunderstorm Warning | MPX | Polk, Saint Croix | 34 min |
| Jul 18, 7:56 PM CDT | Severe Thunderstorm Warning | DLH | Douglas | 49 min |
| Jul 18, 8:45 PM CDT | Severe Thunderstorm Warning | DLH | Douglas | 45 min |
| Jul 18, 9:07 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 23 min |
| Jul 18, 9:29 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 31 min |
| Jul 18, 9:57 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 48 min |
| Jul 18, 10:29 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Rusk | 31 min |
| Jul 18, 10:33 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 30 min |
| Jul 18, 11:46 PM CDT | Severe Thunderstorm Warning | DLH | Price, Sawyer | 29 min |
| Jul 19, 12:12 AM CDT | Severe Thunderstorm Warning | DLH | Price | 19 min |
| Jul 19, 12:22 AM CDT | Severe Thunderstorm Warning | GRB | Oneida | 53 min |
| Jul 19, 12:35 AM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 13 min |
| Jul 19, 12:36 AM CDT | Severe Thunderstorm Warning | ARX | Clark | 40 min |
| Jul 19, 12:51 AM CDT | Severe Thunderstorm Warning | GRB | Forest, Oneida | 39 min |
| Jul 19, 1:19 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 14 min |
| Jul 19, 1:22 AM CDT | Severe Thunderstorm Warning | ARX | Clark | 23 min |
| Jul 19, 1:22 AM CDT | Severe Thunderstorm Warning | GRB | Langlade, Lincoln, Oneida | 38 min |
| Jul 19, 1:24 AM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest | 36 min |
| Jul 19, 1:40 AM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest, Langlade, Marinette, Oconto | 80 min |
| Jul 19, 2:11 AM CDT | Severe Thunderstorm Warning | ARX | Jackson | 34 min |
| Jul 19, 2:15 AM CDT | Severe Thunderstorm Warning | GRB | Wood | 60 min |
| Jul 19, 2:19 AM CDT | Severe Thunderstorm Warning | ARX | Jackson | 26 min |
| Jul 19, 2:22 AM CDT | Severe Thunderstorm Warning | GRB | Langlade, Marathon, Menominee, Oconto, Shawano | 38 min |
| Jul 19, 3:23 AM CDT | Severe Thunderstorm Warning | ARX | Adams | 37 min |
| Jul 19, 3:38 AM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 37 min |
| Jul 19, 3:43 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Green Lake, Marquette | 47 min |
| Jul 19, 3:46 AM CDT | Severe Thunderstorm Warning | GRB | Door | 44 min |
| Jul 19, 3:56 AM CDT | Severe Thunderstorm Warning | MKX | Sauk | 49 min |
| Jul 19, 4:13 AM CDT | Severe Thunderstorm Warning | ARX | Adams | 17 min |
| Jul 19, 4:24 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge, Fond du Lac, Green Lake, Marquette, Sauk | 51 min |
| Jul 19, 4:40 AM CDT | Severe Thunderstorm Warning | GRB | Brown, Kewaunee, Manitowoc | 35 min |
| Jul 19, 4:44 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac, Ozaukee, Sheboygan, Washington | 31 min |
| Jul 21, 4:16 PM CDT | Severe Thunderstorm Warning | DLH | Burnett | 59 min |
| Jul 28, 4:20 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan | 55 min |
| Jul 28, 4:56 PM CDT | Severe Thunderstorm Warning | MKX | Sheboygan | 34 min |
| Jul 28, 5:22 PM CDT | Severe Thunderstorm Warning | GRB | Waushara, Winnebago | 38 min |
| Jul 28, 5:24 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Green Lake | 51 min |
| Jul 28, 5:57 PM CDT | Severe Thunderstorm Warning | GRB | Calumet, Winnebago | 35 min |
| Jul 28, 6:08 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan | 52 min |
| Jul 28, 6:12 PM CDT | Severe Thunderstorm Warning | GRB | Manitowoc | 44 min |
| Aug 8, 11:15 AM CDT | Severe Thunderstorm Warning | ARX | Monroe | 30 min |
| Aug 8, 5:25 PM CDT | Severe Thunderstorm Warning | MPX | Pepin, Pierce | 35 min |
| Aug 8, 5:53 PM CDT | Severe Thunderstorm Warning | MPX | Dunn, Eau Claire, Pepin, Pierce | 37 min |
| Aug 8, 5:58 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo | 22 min |
| Aug 8, 7:24 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, La Crosse, Trempealeau | 51 min |
| Aug 8, 8:01 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, La Crosse, Monroe | 44 min |
| Aug 8, 8:22 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 53 min |
| Aug 8, 8:26 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 64 min |
| Aug 8, 9:12 PM CDT | Severe Thunderstorm Warning | GRB | Portage, Waushara | 49 min |
| Aug 8, 11:04 PM CDT | Severe Thunderstorm Warning | GRB | Winnebago | 28 min |
| Aug 9, 5:35 AM CDT | Severe Thunderstorm Warning | MKX | Sheboygan | 55 min |
| Aug 9, 3:17 PM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 31 min |
| Aug 9, 4:23 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane | 38 min |
| Aug 9, 5:00 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson | 45 min |
| Aug 9, 5:20 PM CDT | Severe Thunderstorm Warning | MKX | Waukesha | 55 min |
| Aug 9, 5:34 PM CDT | Severe Thunderstorm Warning | MKX | Walworth | 26 min |
| Aug 9, 6:04 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee | 41 min |
| Aug 9, 7:26 PM CDT | Severe Thunderstorm Warning | GRB | Vilas | 49 min |
| Aug 10, 3:35 AM CDT | Severe Thunderstorm Warning | DLH | Burnett | 40 min |
| Aug 10, 5:21 AM CDT | Severe Thunderstorm Warning | ARX | Buffalo | 73 min |
| Aug 10, 6:20 AM CDT | Severe Thunderstorm Warning | ARX | Jackson, La Crosse, Trempealeau | 55 min |
| Aug 10, 6:51 AM CDT | Severe Thunderstorm Warning | ARX | Jackson, Monroe | 54 min |
| Aug 10, 7:09 AM CDT | Severe Thunderstorm Warning | GRB | Wood | 51 min |
| Aug 10, 7:20 AM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 70 min |
| Aug 10, 7:57 AM CDT | Severe Thunderstorm Warning | GRB | Portage, Waushara, Wood | 48 min |
| Aug 10, 8:02 AM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 43 min |
| Aug 10, 8:38 AM CDT | Severe Thunderstorm Warning | GRB | Portage, Waupaca, Waushara | 35 min |
| Aug 10, 12:04 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant, Richland | 41 min |
| Aug 10, 12:34 PM CDT | Severe Thunderstorm Warning | MKX | Iowa, Lafayette | 56 min |
| Aug 10, 12:37 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 38 min |
| Aug 10, 1:26 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green, Iowa, Lafayette | 64 min |
| Aug 10, 2:29 PM CDT | Severe Thunderstorm Warning | MKX | Green, Rock, Walworth | 61 min |
| Aug 10, 3:13 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Rock, Walworth | 47 min |
| Aug 10, 3:35 PM CDT | Severe Thunderstorm Warning | GRB | Door | 40 min |
| Aug 10, 3:39 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine | 51 min |
| Aug 10, 4:14 PM CDT | Severe Thunderstorm Warning | GRB | Door | 46 min |
| Aug 10, 4:21 PM CDT | Severe Thunderstorm Warning | MKX | Sheboygan | 39 min |
| Aug 10, 4:25 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine | 50 min |
| Aug 14, 7:10 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Douglas, Washburn | 50 min |
| Aug 14, 7:41 PM CDT | Severe Thunderstorm Warning | DLH | Douglas | 34 min |
| Aug 14, 7:55 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Burnett, Douglas, Sawyer, Washburn | 50 min |
| Aug 14, 8:13 PM CDT | Severe Thunderstorm Warning | MPX | Polk, Saint Croix | 47 min |
| Aug 14, 8:50 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn, Polk, Saint Croix | 40 min |
| Aug 14, 9:01 PM CDT | Severe Thunderstorm Warning | MPX | Pierce, Saint Croix | 44 min |
| Aug 14, 9:29 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Dunn | 31 min |
| Aug 16, 2:37 AM CDT | Severe Thunderstorm Warning | ARX | Trempealeau | 23 min |
| Aug 21, 5:01 PM CDT | Severe Thunderstorm Warning | GRB | Marinette | 29 min |
| Aug 21, 5:18 PM CDT | Severe Thunderstorm Warning | GRB | Marinette | 42 min |
| Aug 21, 6:03 PM CDT | Severe Thunderstorm Warning | GRB | Marinette | 27 min |
| Aug 21, 6:14 PM CDT | Severe Thunderstorm Warning | GRB | Marinette | 27 min |
| Aug 21, 7:39 PM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest, Oneida, Vilas | 51 min |
| Aug 24, 9:44 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 31 min |
| Aug 24, 9:46 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 44 min |
| Aug 24, 9:54 PM CDT | Severe Thunderstorm Warning | GRB | Waushara | 51 min |
| Aug 24, 10:28 PM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 47 min |
| Aug 24, 10:54 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge | 36 min |
| Aug 24, 11:04 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 30 min |
| Aug 24, 11:11 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 49 min |
| Aug 24, 11:13 PM CDT | Severe Thunderstorm Warning | ARX | Adams | 47 min |
| Aug 24, 11:19 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Jackson, Trempealeau | 41 min |
| Aug 24, 11:19 PM CDT | Severe Thunderstorm Warning | GRB | Waushara | 56 min |
| Aug 24, 11:23 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Jefferson | 39 min |
| Aug 24, 11:47 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 43 min |
| Aug 24, 11:59 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Jackson | 61 min |
| Aug 24, 11:59 PM CDT | Severe Thunderstorm Warning | MPX | Eau Claire | 46 min |
| Aug 25, 12:27 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Green Lake, Marquette | 48 min |
| Aug 25, 12:29 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Rock, Walworth | 46 min |
| Aug 25, 12:32 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Dunn | 58 min |
| Aug 25, 12:47 AM CDT | Severe Thunderstorm Warning | GRB | Portage, Waushara, Wood | 44 min |
| Aug 25, 12:59 AM CDT | Severe Thunderstorm Warning | ARX | Clark | 46 min |
| Aug 25, 1:05 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Eau Claire | 40 min |
| Aug 25, 1:07 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge | 38 min |
| Aug 25, 1:16 AM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 44 min |
| Aug 25, 1:45 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Jefferson, Waukesha | 46 min |
| Aug 25, 2:08 AM CDT | Severe Thunderstorm Warning | ARX | Clark, Jackson | 37 min |
| Aug 25, 2:14 AM CDT | Severe Thunderstorm Warning | GRB | Wood | 61 min |
| Aug 25, 2:47 AM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau | 28 min |
| Aug 25, 2:50 AM CDT | Severe Thunderstorm Warning | GRB | Marathon | 37 min |
| Aug 25, 2:54 AM CDT | Severe Thunderstorm Warning | MKX | Walworth | 40 min |
| Aug 25, 7:08 AM CDT | Severe Thunderstorm Warning | ARX | Adams, Juneau, Monroe | 67 min |
| Aug 25, 8:44 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge | 31 min |
| Aug 25, 10:58 AM CDT | Severe Thunderstorm Warning | GRB | Portage, Waushara, Wood | 32 min |
| Aug 25, 1:52 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Green Lake | 27 min |
| Aug 27, 3:51 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge, Fond du Lac, Green Lake | 39 min |
| Aug 27, 4:41 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dodge | 34 min |
| Aug 27, 5:24 PM CDT | Severe Thunderstorm Warning | MKX | Columbia | 34 min |
| Aug 27, 7:30 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Sauk | 45 min |
| Aug 27, 10:08 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 37 min |
| Sep 23, 10:01 PM CDT | Severe Thunderstorm Warning | GRB | Vilas | 44 min |
| Sep 25, 6:53 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Iron | 52 min |
| Sep 25, 7:48 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 42 min |
| Sep 25, 8:25 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 50 min |
| Sep 25, 8:53 PM CDT | Severe Thunderstorm Warning | GRB | Vilas | 67 min |
| Sep 25, 9:14 PM CDT | Severe Thunderstorm Warning | DLH | Iron | 36 min |
| Sep 25, 9:53 PM CDT | Severe Thunderstorm Warning | GRB | Forest, Vilas | 52 min |
| Sep 25, 10:44 PM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest | 28 min |
| Sep 26, 3:00 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Marathon, Menominee, Oconto, Shawano | 45 min |
| Sep 26, 3:09 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Lincoln, Marathon | 51 min |
| Sep 26, 4:09 PM CDT | Severe Thunderstorm Warning | GRB | Marinette, Oconto | 21 min |
| Sep 26, 4:13 PM CDT | Severe Thunderstorm Warning | GRB | Forest, Langlade, Marinette, Oconto | 32 min |
| Sep 26, 5:15 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Polk | 30 min |
| Sep 26, 5:33 PM CDT | Severe Thunderstorm Warning | GRB | Door | 42 min |
| Sep 26, 7:12 PM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest, Vilas | 33 min |
| Nov 10, 3:38 PM CST | Severe Thunderstorm Warning | MKX | Rock, Walworth | 82 min |
| Nov 10, 4:16 PM CST | Severe Thunderstorm Warning | MKX | Kenosha, Racine | 74 min |
| Nov 10, 4:17 PM CST | Severe Thunderstorm Warning | MKX | Jefferson, Waukesha | 44 min |
| Nov 10, 4:35 PM CST | Severe Thunderstorm Warning | MKX | Milwaukee | 38 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Columbia County18
- Bayfield County17
- Jackson County16
- Ashland County15
- Douglas County15
- Dodge County14
- Waushara County13
- Fond du Lac County13
- Dane County13
- Trempealeau County12
- Wood County12
- Adams County12
- Sauk County12
- Forest County12
- Green Lake County11
- Waukesha County11
- Sheboygan County11
- Winnebago County10
- Rock County10
- Langlade County10
- Marinette County10
- Clark County10
- Juneau County10
- Iowa County10
- Jefferson County10
- Sawyer County9
- Washington County9
- Milwaukee County9
- Marquette County9
- Eau Claire County9
- Oneida County9
- La Crosse County9
- Walworth County9
- Oconto County8
- Door County8
- Ozaukee County8
- Green County8
- Portage County8
- Racine County8
- Marathon County8
32 more counties
- Iron County8
- Vilas County8
- Grant County7
- Lincoln County7
- Lafayette County7
- Dunn County7
- Chippewa County7
- Florence County7
- Monroe County7
- Saint Croix County7
- Crawford County6
- Price County6
- Kewaunee County6
- Manitowoc County6
- Shawano County5
- Brown County5
- Calumet County5
- Buffalo County5
- Pierce County5
- Barron County5
- Burnett County5
- Polk County5
- Kenosha County5
- Washburn County4
- Menominee County4
- Pepin County4
- Vernon County4
- Waupaca County3
- Rusk County2
- Outagamie County2
- Richland County2
- Taylor County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.