Alert archive / Wisconsin / Walworth County
Weather alerts in Walworth County, Wisconsin, 2019
133 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 133
- Warnings
- 17
- Watches
- 19
- Advisories
- 44
- Busiest month
- June23 alerts
- Busiest day
- June 1, 20199 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Walworth County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 6 | 4 | 33% | 14 | 50% | 27 min |
| Flash flood warnings | 2 | 1 | 50% | 1 | 100% | 87 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Milwaukee, WI: tornado warnings | 3 | 1 | 67% | 3 | 67% | 11 min |
| NWS Milwaukee, WI: severe thunderstorm warnings | 60 | 32 | 47% | 157 | 66% | 24 min |
| NWS Milwaukee, WI: flash flood warnings | 14 | 10 | 29% | 31 | 81% | 66 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 8, 2:33 PM CST | Wind Advisory | MKX | 6 hr |
| Jan 14, 1:29 PM CST | Winter Weather Advisory | MKX | 13 hr |
| Jan 15, 8:13 PM CST | Winter Weather Advisory | MKX | 3 hr |
| Jan 17, 11:38 AM CST | Winter Storm Watch | MKX | 16 hr |
| Jan 18, 3:19 AM CST | Winter Storm Warning | MKX | 42 hr |
| Jan 18, 6:58 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 21, 1:38 PM CST | Winter Weather Advisory | MKX | 24 hr |
| Jan 22, 2:21 AM CST | Winter Storm Warning | MKX | 34 hr |
| Jan 22, 2:36 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 24, 1:43 AM CST | Wind Chill Advisory | MKX | 34 hr |
| Jan 26, 3:44 AM CST | Winter Storm Watch | MKX | 12 hr |
| Jan 26, 3:23 PM CST | Winter Storm Warning | MKX | 51 hr |
| Jan 26, 3:52 PM CST | Wind Chill Advisory | MKX | 17 hr |
| Jan 27, 7:04 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 28, 2:42 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 28, 1:48 PM CST | Wind Chill Warning | MKX | 70 hr |
| Jan 28, 1:48 PM CST | Wind Chill Advisory | MKX | 28 hr |
| Jan 31, 9:35 AM CST | Wind Chill Advisory | MKX | 8 hr |
| Feb 2, 9:07 AM CST | Dense Fog Advisory | MKX | 46 hr |
| Feb 4, 2:53 PM CST | Winter Weather Advisory | MKX | 42 hr |
| Feb 5, 5:56 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 6, 4:01 AM CST | Winter Weather Advisory | MKX | 38 hr |
| Feb 7, 2:36 PM CST | Wind Chill Advisory | MKX | 21 hr |
| Feb 10, 2:00 PM CST | Winter Storm Watch | MKX | 13 hr |
| Feb 11, 3:24 AM CST | Winter Weather Advisory | MKX | 48 hr |
| Feb 16, 1:52 PM CST | Winter Weather Advisory | MKX | 40 hr |
| Feb 19, 3:48 AM CST | Winter Weather Advisory | MKX | 38 hr |
| Feb 22, 3:54 AM CST | Winter Weather Advisory | MKX | 32 hr |
| Feb 23, 11:34 AM CST | Areal Flood Advisory | MKX | 12 hr |
| Feb 23, 1:58 PM CST | Wind Advisory | MKX | 6 hr |
| Feb 23, 5:47 PM CST | Dense Fog Advisory | MKX | 10 hr |
| Feb 23, 8:18 PM CST | High Wind Warning | MKX | 25 hr |
| Feb 24, 2:32 PM CST | Wind Chill Advisory | MKX | 18 hr |
| Feb 26, 2:58 AM CST | Winter Weather Advisory | MKX | 33 hr |
| Mar 3, 2:19 AM CST | Wind Chill Advisory | MKX | 32 hr |
| Mar 9, 5:59 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 12, 2:13 PM CDT | Flood Watch | MKX | 62 hr |
| Mar 13, 3:04 PM CDT | Wind Advisory | MKX | 18 hr |
| Mar 14, 1:34 PM CDT | Special Weather Statement | MKX | 56 min |
| Apr 6, 6:10 AM CDT | Dense Fog Advisory | MKX | 3 hr |
| Apr 10, 3:12 PM CDT | Wind Advisory | MKX | 28 hr |
| Apr 26, 2:51 AM CDT | Winter Storm Watch | MKX | 12 hr |
| Apr 26, 3:00 PM CDT | Winter Storm Warning | MKX | 23 hr |
| Apr 26, 3:00 PM CDT | Winter Weather Advisory | MKX | 31 hr |
| Apr 27, 11:32 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| May 3, 5:59 AM CDT | Dense Fog Advisory | MKX | 3 hr |
| May 19, 11:48 AM CDT | Special Weather Statement | MKX | 42 min |
| May 22, 7:58 PM CDT | Special Weather Statement | MKX | 32 min |
| May 24, 4:18 AM CDT | Flash Flood Watch | MKX | 23 hr |
| Jun 1, 7:35 AM CDT | Special Weather Statement | MKX | 40 min |
| Jun 1, 8:17 AM CDT | Special Weather Statement | MKX | 43 min |
| Jun 1, 2:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 1, 2:23 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 1, 3:07 PM CDT | Special Weather Statement | MKX | 53 min |
| Jun 1, 3:31 PM CDT | Severe Thunderstorm Warning | MKX | 44 min |
| Jun 1, 4:13 PM CDT | Areal Flood Advisory | MKX | 2 hr |
| Jun 1, 4:23 PM CDT | Severe Thunderstorm Warning | MKX | 37 min |
| Jun 1, 5:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 4, 11:05 PM CDT | Special Weather Statement | MKX | 55 min |
| Jun 24, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 25, 1:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 1:52 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 3:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 27, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 27, 4:08 PM CDT | Severe Thunderstorm Warning | MKX | 52 min |
| Jun 27, 4:52 PM CDT | Special Weather Statement | MKX | 53 min |
| Jun 27, 5:04 PM CDT | Severe Thunderstorm Warning | MKX | 71 min |
| Jun 28, 7:34 AM CDT | Special Weather Statement | MKX | 56 min |
| Jun 30, 11:43 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 30, 11:47 AM CDT | Special Weather Statement | MKX | 73 min |
| Jun 30, 11:59 AM CDT | Severe Thunderstorm Warning | MKX | 76 min |
| Jun 30, 1:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 2:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 2, 6:35 PM CDT | Special Weather Statement | MKX | 55 min |
| Jul 2, 7:25 PM CDT | Special Weather Statement | MKX | 50 min |
| Jul 4, 8:03 PM CDT | Special Weather Statement | MKX | 27 min |
| Jul 5, 4:45 PM CDT | Special Weather Statement | MKX | 30 min |
| Jul 5, 5:18 PM CDT | Special Weather Statement | MKX | 27 min |
| Jul 17, 3:36 AM CDT | Heat Advisory | MKX | 54 hr |
| Jul 19, 2:57 AM CDT | Excessive Heat Warning | MKX | 36 hr |
| Jul 20, 12:40 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 20, 1:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 2:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 3:24 PM CDT | Special Weather Statement | MKX | 51 min |
| Aug 5, 9:37 PM CDT | Special Weather Statement | MKX | 53 min |
| Aug 7, 10:47 PM CDT | Special Weather Statement | MKX | 73 min |
| Aug 11, 11:56 PM CDT | Dense Fog Advisory | MKX | 9 hr |
| Aug 13, 4:35 PM CDT | Special Weather Statement | MKX | 25 min |
| Aug 16, 4:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 5:44 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 18, 6:06 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 18, 6:46 AM CDT | Special Weather Statement | MKX | 44 min |
| Aug 18, 7:20 AM CDT | Special Weather Statement | MKX | 40 min |
| Aug 18, 7:40 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 12:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Sep 11, 1:31 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 11, 3:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Sep 11, 8:19 PM CDT | Special Weather Statement | MKX | 56 min |
| Sep 11, 9:24 PM CDT | Severe Thunderstorm Warning | MKX | 23 min |
| Sep 11, 9:32 PM CDT | Areal Flood Advisory | MKX | 3 hr |
| Sep 12, 2:45 AM CDT | Flash Flood Watch | MKX | 25 hr |
| Sep 12, 6:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Sep 12, 6:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 12, 10:22 PM CDT | Special Weather Statement | MKX | 53 min |
| Sep 12, 10:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 13, 12:01 AM CDT | Flash Flood Warning | MKX | 3 hr |
| Sep 13, 3:00 AM CDT | Areal Flood Warning | MKX | 6 hr |
| Sep 13, 9:01 AM CDT | Areal Flood Advisory | MKX | 12 hr |
| Sep 14, 3:20 AM CDT | Flash Flood Watch | MKX | 27 hr |
| Sep 15, 8:44 PM CDT | Dense Fog Advisory | MKX | 14 hr |
| Sep 16, 6:59 PM CDT | Dense Fog Advisory | MKX | 15 hr |
| Sep 20, 12:41 AM CDT | Dense Fog Advisory | MKX | 9 hr |
| Sep 21, 3:52 AM CDT | Flash Flood Watch | MKX | 39 hr |
| Sep 27, 7:47 PM CDT | Special Weather Statement | MKX | 43 min |
| Sep 30, 1:44 AM CDT | Dense Fog Advisory | MKX | 9 hr |
| Sep 30, 2:42 PM CDT | Flash Flood Watch | MKX | 40 hr |
| Oct 1, 10:18 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 1, 5:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Oct 1, 6:05 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Oct 1, 8:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Oct 1, 9:24 PM CDT | Special Weather Statement | MKX | 51 min |
| Oct 1, 10:31 PM CDT | Flash Flood Warning | MKX | 2 hr |
| Oct 11, 3:22 AM CDT | Freeze Warning | MKX | 30 hr |
| Oct 13, 2:16 PM CDT | Frost Advisory | MKX | 19 hr |
| Oct 21, 8:39 PM CDT | Wind Advisory | MKX | 18 hr |
| Oct 30, 2:37 PM CDT | Winter Weather Advisory | MKX | 24 hr |
| Nov 10, 1:10 PM CST | Winter Weather Advisory | MKX | 26 hr |
| Nov 26, 3:55 AM CST | Wind Advisory | MKX | 38 hr |
| Dec 9, 8:31 AM CST | Special Weather Statement | MKX | 29 min |
| Dec 9, 11:41 AM CST | Winter Weather Advisory | MKX | 5 hr |
| Dec 13, 11:01 PM CST | Special Weather Statement | MKX | 119 min |
| Dec 14, 2:21 AM CST | Freezing Fog Advisory | MKX | 7 hr |
| Dec 24, 2:43 AM CST | Dense Fog Advisory | MKX | 7 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.