Alert archive / Wisconsin / Walworth County
Weather alerts in Walworth County, Wisconsin, 2024
163 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Walworth County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 163
- Warnings
- 48
- Watches
- 20
- Advisories
- 37
- Busiest month
- May34 alerts
- Busiest day
- July 15, 20249 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 9 tornado warnings covering Walworth County in 2024 had a tornado report inside them; 4 of 4 tornado reports fell inside a warning, on average 13 minutes after it went out.
Walworth County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 9 | 3 | 67% | 4 | 100% | 13 min |
| Severe thunderstorm warnings | 32 | 20 | 38% | 19 | 63% | 11 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Milwaukee, WI: tornado warnings | 55 | 11 | 80% | 24 | 79% | 13 min |
| NWS Milwaukee, WI: severe thunderstorm warnings | 174 | 84 | 52% | 283 | 78% | 25 min |
| NWS Milwaukee, WI: flash flood warnings | 16 | 4 | 75% | 21 | 24% | 22 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 | Lasted |
|---|---|---|---|
| Jan 7, 2:02 PM CST | Winter Storm Watch | MKX | 24 hr |
| Jan 8, 2:41 AM CST | Winter Storm Warning | MKX | 48 hr |
| Jan 8, 2:41 AM CST | Winter Weather Advisory | MKX | 27 hr |
| Jan 9, 1:09 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Jan 10, 2:49 PM CST | Winter Storm Watch | MKX | 23 hr |
| Jan 11, 1:36 PM CST | Winter Storm Warning | MKX | 37 hr |
| Jan 12, 4:23 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 12, 10:24 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 13, 2:55 AM CST | Wind Chill Advisory | MKX | 4 days |
| Jan 13, 2:55 AM CST | Winter Weather Advisory | MKX | 12 hr |
| Jan 13, 2:59 PM CST | Winter Weather Advisory | MKX | 12 hr |
| Jan 19, 2:54 AM CST | Wind Chill Advisory | MKX | 30 hr |
| Jan 20, 2:01 AM CST | Wind Chill Advisory | MKX | 31 hr |
| Jan 22, 2:08 PM CST | Winter Weather Advisory | MKX | 24 hr |
| Jan 23, 2:14 PM CST | Dense Fog Advisory | MKX | 22 hr |
| Jan 24, 2:17 PM CST | Dense Fog Advisory | MKX | 40 hr |
| Jan 26, 1:21 PM CST | Dense Fog Advisory | MKX | 23 hr |
| Jan 27, 1:27 PM CST | Dense Fog Advisory | MKX | 10 hr |
| Feb 4, 5:52 PM CST | Freezing Fog Advisory | MKX | 14 hr |
| Feb 5, 9:36 PM CST | Dense Fog Advisory | MKX | 14 hr |
| Feb 6, 5:40 PM CST | Dense Fog Advisory | MKX | 16 hr |
| Feb 8, 5:55 PM CST | Severe Thunderstorm Warning | MKX | 50 min |
| Feb 8, 6:22 PM CST | Severe Thunderstorm Warning | MKX | 35 min |
| Feb 8, 6:42 PM CST | Severe Thunderstorm Warning | MKX | 33 min |
| Feb 27, 3:53 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 27, 7:48 PM CST | Special Weather Statement | MKX | 27 min |
| Feb 27, 8:01 PM CST | Special Weather Statement | MKX | 59 min |
| Mar 4, 1:25 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 4, 3:37 PM CST | Severe Thunderstorm Warning | MKX | 53 min |
| Mar 4, 4:04 PM CST | Tornado Warning | MKX | 41 min |
| Mar 4, 4:22 PM CST | Areal Flood Advisory | MKX | 3 hr |
| Mar 4, 4:30 PM CST | Severe Thunderstorm Warning | MKX | 45 min |
| Mar 4, 4:38 PM CST | Severe Thunderstorm Warning | MKX | 37 min |
| Mar 21, 2:25 AM CDT | Winter Weather Advisory | MKX | 37 hr |
| Mar 26, 10:41 AM CDT | Special Weather Statement | MKX | 64 min |
| Apr 2, 3:41 AM CDT | Winter Weather Advisory | MKX | 31 hr |
| Apr 16, 5:52 PM CDT | Tornado Watch | SPC | 4 hr |
| Apr 16, 9:25 PM CDT | Severe Thunderstorm Warning | MKX | 45 min |
| Apr 20, 2:05 PM CDT | Freeze Warning | MKX | 18 hr |
| Apr 23, 2:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Apr 24, 3:15 AM CDT | Freeze Watch | MKX | 11 hr |
| Apr 24, 2:01 PM CDT | Freeze Warning | MKX | 18 hr |
| Apr 27, 6:47 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 27, 9:49 PM CDT | Special Weather Statement | MKX | 26 min |
| Apr 27, 10:01 PM CDT | Severe Thunderstorm Warning | MKX | 74 min |
| May 2, 3:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 4, 4:50 PM CDT | Special Weather Statement | MKX | 25 min |
| May 7, 1:28 PM CDT | Tornado Watch | SPC | 12 hr |
| May 7, 2:10 PM CDT | Tornado Warning | MKX | 35 min |
| May 7, 2:33 PM CDT | Severe Thunderstorm Warning | MKX | 42 min |
| May 7, 2:48 PM CDT | Severe Thunderstorm Warning | MKX | 42 min |
| May 7, 7:18 PM CDT | Special Weather Statement | MKX | 27 min |
| May 7, 7:47 PM CDT | Severe Thunderstorm Warning | MKX | 43 min |
| May 7, 8:20 PM CDT | Tornado Warning | MKX | 25 min |
| May 7, 8:23 PM CDT | Severe Thunderstorm Warning | MKX | 37 min |
| May 7, 8:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 7, 8:43 PM CDT | Severe Thunderstorm Warning | MKX | 47 min |
| May 12, 7:30 PM CDT | Special Weather Statement | MKX | 45 min |
| May 20, 10:13 AM CDT | Mesoscale Discussion | SPC | 92 min |
| May 20, 12:39 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 20, 11:44 PM CDT | Dense Fog Advisory | MKX | 10 hr |
| May 21, 3:58 PM CDT | Tornado Watch | SPC | 9 hr |
| May 21, 7:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| May 21, 8:47 PM CDT | Severe Thunderstorm Warning | MKX | 28 min |
| May 21, 11:33 PM CDT | Severe Thunderstorm Warning | MKX | 42 min |
| May 21, 11:47 PM CDT | Severe Thunderstorm Warning | MKX | 43 min |
| May 24, 6:07 AM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 24, 8:44 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 10:24 AM CDT | Special Weather Statement | MKX | 51 min |
| May 24, 10:36 AM CDT | Severe Thunderstorm Warning | MKX | 39 min |
| May 24, 4:35 PM CDT | Special Weather Statement | MKX | 40 min |
| May 24, 4:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| May 24, 6:29 PM CDT | Special Weather Statement | MKX | 46 min |
| May 26, 3:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 26, 5:40 PM CDT | Tornado Warning | MKX | 35 min |
| May 26, 5:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 26, 5:58 PM CDT | Tornado Warning | MKX | 32 min |
| May 26, 6:01 PM CDT | Tornado Warning | MKX | 29 min |
| May 28, 1:02 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 1, 9:01 PM CDT | Dense Fog Advisory | MKX | 12 hr |
| Jun 3, 3:33 PM CDT | Special Weather Statement | MKX | 42 min |
| Jun 3, 3:36 PM CDT | Severe Thunderstorm Warning | MKX | 24 min |
| Jun 3, 4:46 PM CDT | Flood Watch | MKX | 8 hr |
| Jun 3, 6:25 PM CDT | Severe Thunderstorm Warning | MKX | 39 min |
| Jun 3, 6:56 PM CDT | Severe Thunderstorm Warning | MKX | 34 min |
| Jun 3, 7:08 PM CDT | Tornado Warning | MKX | 22 min |
| Jun 3, 7:25 PM CDT | Areal Flood Advisory | MKX | 2 hr |
| Jun 3, 7:26 PM CDT | Special Weather Statement | MKX | 34 min |
| Jun 3, 7:49 PM CDT | Areal Flood Advisory | MKX | 116 min |
| Jun 12, 4:51 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 2:15 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 16, 3:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 4:18 PM CDT | Severe Thunderstorm Warning | MKX | 57 min |
| Jun 17, 3:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 3:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 22, 3:13 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 22, 7:24 PM CDT | Severe Thunderstorm Warning | MKX | 51 min |
| Jun 22, 7:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 22, 8:02 PM CDT | Severe Thunderstorm Warning | MKX | 43 min |
| Jun 22, 8:06 PM CDT | Tornado Warning | MKX | 39 min |
| Jun 22, 8:18 PM CDT | Severe Thunderstorm Warning | MKX | 60 min |
| Jun 22, 8:29 PM CDT | Tornado Warning | MKX | 46 min |
| Jun 24, 7:31 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 25, 4:09 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 25, 4:52 AM CDT | Special Weather Statement | MKX | 38 min |
| Jun 25, 5:00 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 25, 5:31 AM CDT | Special Weather Statement | MKX | 59 min |
| Jun 25, 6:28 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 25, 6:31 AM CDT | Special Weather Statement | MKX | 44 min |
| Jun 25, 7:42 PM CDT | Severe Thunderstorm Warning | MKX | 33 min |
| Jul 13, 2:26 PM CDT | Heat Advisory | MKX | 29 hr |
| Jul 13, 8:55 PM CDT | Special Weather Statement | MKX | 35 min |
| Jul 14, 6:08 AM CDT | Special Weather Statement | MKX | 52 min |
| Jul 14, 6:20 AM CDT | Special Weather Statement | MKX | 25 min |
| Jul 14, 6:37 AM CDT | Special Weather Statement | MKX | 68 min |
| Jul 14, 3:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 14, 5:55 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 14, 7:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 14, 8:41 PM CDT | Severe Thunderstorm Warning | MKX | 34 min |
| Jul 14, 8:49 PM CDT | Severe Thunderstorm Warning | MKX | 41 min |
| Jul 14, 8:58 PM CDT | Areal Flood Advisory | MKX | 3 hr |
| Jul 14, 9:04 PM CDT | Special Weather Statement | MKX | 41 min |
| Jul 14, 9:22 PM CDT | Severe Thunderstorm Warning | MKX | 23 min |
| Jul 15, 1:59 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 15, 6:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 15, 6:53 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 15, 8:10 PM CDT | Severe Thunderstorm Warning | MKX | 65 min |
| Jul 15, 8:40 PM CDT | Areal Flood Advisory | MKX | 3 hr |
| Jul 16, 1:37 PM CDT | Special Weather Statement | MKX | 68 min |
| Jul 16, 2:42 PM CDT | Special Weather Statement | MKX | 93 min |
| Aug 1, 7:56 PM CDT | Special Weather Statement | MKX | 64 min |
| Aug 5, 5:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Aug 6, 1:14 AM CDT | Special Weather Statement | MKX | 61 min |
| Aug 6, 2:03 AM CDT | Severe Thunderstorm Warning | MKX | 42 min |
| Aug 6, 2:26 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 14, 3:51 AM CDT | Dense Fog Advisory | MKX | 5 hr |
| Aug 16, 1:53 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 16, 5:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 25, 3:06 AM CDT | Excessive Heat Warning | MKX | 41 hr |
| Aug 25, 3:06 AM CDT | Heat Advisory | MKX | 41 hr |
| Aug 25, 2:45 PM CDT | Excessive Heat Watch | MKX | 24 hr |
| Aug 26, 2:31 PM CDT | Excessive Heat Warning | MKX | 28 hr |
| Aug 27, 11:25 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 27, 12:04 PM CDT | Severe Thunderstorm Watch | SPC | 2 hr |
| Aug 27, 12:13 PM CDT | Severe Thunderstorm Warning | MKX | 32 min |
| Aug 27, 12:44 PM CDT | Special Weather Statement | MKX | 61 min |
| Aug 27, 4:42 PM CDT | Severe Thunderstorm Warning | MKX | 32 min |
| Aug 27, 4:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 27, 5:09 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Oct 15, 1:18 AM CDT | Freeze Warning | MKX | 32 hr |
| Oct 30, 2:22 PM CDT | Wind Advisory | MKX | 32 hr |
| Oct 31, 9:44 AM CDT | Special Weather Statement | MKX | 91 min |
| Nov 17, 11:40 PM CST | Dense Fog Advisory | MKX | 7 hr |
| Nov 20, 3:17 AM CST | Winter Weather Advisory | MKX | 33 hr |
| Nov 21, 2:43 AM CST | Wind Advisory | MKX | 11 hr |
| Nov 21, 4:09 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 4, 2:08 AM CST | Wind Advisory | MKX | 22 hr |
| Dec 13, 2:00 PM CST | Winter Weather Advisory | MKX | 34 hr |
| Dec 15, 4:11 AM CST | Dense Fog Advisory | MKX | 30 hr |
| Dec 22, 2:36 PM CST | Winter Weather Advisory | MKX | 28 hr |
| Dec 26, 1:51 AM CST | Dense Fog Advisory | MKX | 7 hr |
| Dec 26, 9:08 AM CST | Dense Fog Advisory | MKX | 27 hr |
| Dec 28, 9:30 PM CST | Dense Fog Advisory | MKX | 15 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 32 |
| Tornado Warning | 9 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 32 |
| Special Weather Statement | 26 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 9 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 14 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.