Alert archive / Wisconsin / Jefferson County
Weather alerts in Jefferson County, Wisconsin, 2022
118 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 118
- Warnings
- 35
- Watches
- 14
- Advisories
- 42
- Busiest month
- July21 alerts
- Busiest day
- June 16, 20226 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 3 tornado warnings covering Jefferson County in 2022 had a tornado report inside them; 1 of 3 tornado reports fell inside a warning, on average 15 minutes after it went out.
Jefferson County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 3 | 0% | 3 | 33% | 15 min |
| Severe thunderstorm warnings | 22 | 16 | 27% | 18 | 94% | 35 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Milwaukee, WI: tornado warnings | 22 | 7 | 68% | 17 | 76% | 16 min |
| NWS Milwaukee, WI: severe thunderstorm warnings | 124 | 83 | 33% | 288 | 79% | 23 min |
| NWS Milwaukee, WI: flash flood warnings | 8 | 3 | 63% | 11 | 73% | 74 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 4, 3:25 AM CST | Winter Weather Advisory | MKX | 39 hr |
| Jan 6, 2:20 AM CST | Wind Chill Advisory | MKX | 31 hr |
| Jan 8, 1:47 PM CST | Winter Weather Advisory | MKX | 10 hr |
| Jan 23, 2:11 PM CST | Winter Weather Advisory | MKX | 22 hr |
| Jan 24, 2:57 AM CST | Wind Chill Advisory | MKX | 33 hr |
| Jan 25, 2:17 AM CST | Wind Chill Advisory | MKX | 34 hr |
| Feb 18, 3:18 AM CST | Wind Advisory | MKX | 24 hr |
| Feb 18, 5:39 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 18, 6:46 PM CST | Snow Squall Warning | MKX | 59 min |
| Feb 18, 7:20 PM CST | Snow Squall Warning | MKX | 55 min |
| Feb 18, 7:28 PM CST | Snow Squall Warning | MKX | 62 min |
| Feb 18, 7:47 PM CST | Snow Squall Warning | MKX | 58 min |
| Feb 19, 1:51 PM CST | Wind Advisory | MKX | 25 hr |
| Feb 20, 2:22 PM CST | Winter Weather Advisory | MKX | 52 hr |
| Feb 24, 2:48 AM CST | Winter Weather Advisory | MKX | 27 hr |
| Mar 5, 3:00 AM CST | Wind Advisory | MKX | 30 hr |
| Mar 5, 8:36 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 5, 9:58 PM CST | Special Weather Statement | MKX | 47 min |
| Mar 5, 10:18 PM CST | Severe Thunderstorm Warning | MKX | 27 min |
| Mar 5, 10:25 PM CST | Severe Thunderstorm Warning | MKX | 50 min |
| Mar 6, 2:54 PM CST | Winter Weather Advisory | MKX | 21 hr |
| Mar 23, 8:31 AM CDT | Dense Fog Advisory | MKX | 10 hr |
| Mar 25, 11:39 AM CDT | Wind Advisory | MKX | 10 hr |
| Mar 30, 3:38 PM CDT | Winter Weather Advisory | MKX | 19 hr |
| Apr 13, 2:22 PM CDT | Wind Advisory | MKX | 29 hr |
| Apr 30, 1:46 PM CDT | Tornado Watch | SPC | 8 hr |
| May 10, 12:45 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 10, 2:19 PM CDT | Tornado Watch | SPC | 7 hr |
| May 13, 4:47 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 12:34 AM CDT | Dense Fog Advisory | MKX | 7 hr |
| Jun 10, 6:00 PM CDT | Severe Thunderstorm Warning | MKX | 28 min |
| Jun 11, 7:06 AM CDT | Dense Fog Advisory | MKX | 117 min |
| Jun 12, 12:04 AM CDT | Dense Fog Advisory | MKX | 9 hr |
| Jun 13, 3:24 AM CDT | Heat Advisory | MKX | 65 hr |
| Jun 13, 2:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 2:59 PM CDT | Severe Thunderstorm Warning | MKX | 76 min |
| Jun 13, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 15, 1:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 15, 2:28 PM CDT | Tornado Watch | SPC | 10 hr |
| Jun 15, 5:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 15, 7:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 15, 7:09 PM CDT | Severe Thunderstorm Warning | MKX | 51 min |
| Jun 15, 7:35 PM CDT | Severe Thunderstorm Warning | MKX | 55 min |
| Jun 15, 8:25 PM CDT | Special Weather Statement | MKX | 35 min |
| Jun 15, 8:46 PM CDT | Flash Flood Warning | MKX | 3 hr |
| Jun 15, 8:56 PM CDT | Special Weather Statement | MKX | 34 min |
| Jun 20, 2:25 PM CDT | Heat Advisory | MKX | 29 hr |
| Jun 21, 8:08 PM CDT | Special Weather Statement | MKX | 37 min |
| Jun 26, 12:45 AM CDT | Dense Fog Advisory | MKX | 4 hr |
| Jul 3, 2:44 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| Jul 4, 3:05 PM CDT | Heat Advisory | MKX | 28 hr |
| Jul 4, 6:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 4, 8:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 9:17 PM CDT | Severe Thunderstorm Warning | MKX | 43 min |
| Jul 4, 9:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 5, 4:34 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 6:41 PM CDT | Special Weather Statement | MKX | 34 min |
| Jul 11, 7:31 PM CDT | Special Weather Statement | MKX | 44 min |
| Jul 16, 12:16 AM CDT | Dense Fog Advisory | MKX | 9 hr |
| Jul 23, 2:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 23, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 6:12 PM CDT | Severe Thunderstorm Warning | MKX | 93 min |
| Jul 23, 6:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 6:43 PM CDT | Special Weather Statement | MKX | 77 min |
| Jul 23, 7:17 PM CDT | Severe Thunderstorm Warning | MKX | 73 min |
| Jul 23, 8:17 PM CDT | Severe Thunderstorm Warning | MKX | 56 min |
| Jul 24, 12:41 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 24, 2:03 AM CDT | Severe Thunderstorm Warning | MKX | 42 min |
| Jul 24, 2:05 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 24, 2:41 AM CDT | Severe Thunderstorm Warning | MKX | 55 min |
| Aug 3, 10:42 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 3, 12:21 PM CDT | Severe Thunderstorm Warning | MKX | 39 min |
| Aug 6, 3:38 AM CDT | Heat Advisory | MKX | 15 hr |
| Aug 6, 2:47 PM CDT | Flood Watch | MKX | 41 hr |
| Aug 21, 1:06 AM CDT | Dense Fog Advisory | MKX | 7 hr |
| Aug 28, 1:09 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 28, 3:29 PM CDT | Severe Thunderstorm Warning | MKX | 46 min |
| Aug 28, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 28, 4:13 PM CDT | Severe Thunderstorm Warning | MKX | 62 min |
| Sep 7, 3:28 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| Sep 11, 3:02 AM CDT | Flood Watch | MKX | 31 hr |
| Sep 20, 1:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Sep 20, 1:14 PM CDT | Severe Thunderstorm Warning | MKX | 46 min |
| Sep 20, 2:14 PM CDT | Special Weather Statement | MKX | 46 min |
| Sep 20, 2:16 PM CDT | Severe Thunderstorm Warning | MKX | 44 min |
| Sep 20, 2:49 PM CDT | Special Weather Statement | MKX | 56 min |
| Sep 20, 2:56 PM CDT | Severe Thunderstorm Warning | MKX | 27 min |
| Sep 25, 5:20 PM CDT | Severe Thunderstorm Warning | MKX | 40 min |
| Sep 25, 5:59 PM CDT | Severe Thunderstorm Warning | MKX | 46 min |
| Sep 28, 1:53 PM CDT | Frost Advisory | MKX | 18 hr |
| Sep 29, 6:32 AM CDT | Dense Fog Advisory | MKX | 88 min |
| Oct 1, 5:29 AM CDT | Dense Fog Advisory | MKX | 4 hr |
| Oct 7, 2:26 AM CDT | Freeze Warning | MKX | 30 hr |
| Oct 12, 11:27 AM CDT | Tornado Warning | MKX | 33 min |
| Oct 12, 11:31 AM CDT | Tornado Warning | MKX | 29 min |
| Oct 12, 11:46 AM CDT | Tornado Warning | MKX | 29 min |
| Oct 13, 2:31 PM CDT | Frost Advisory | MKX | 13 hr |
| Oct 14, 3:02 PM CDT | Freeze Warning | MKX | 18 hr |
| Oct 15, 2:36 PM CDT | Freeze Watch | MKX | 13 hr |
| Oct 16, 3:37 AM CDT | Freeze Warning | MKX | 29 hr |
| Oct 28, 11:33 PM CDT | Dense Fog Advisory | MKX | 9 hr |
| Nov 4, 2:42 AM CDT | Wind Advisory | MKX | 42 hr |
| Nov 4, 2:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Nov 4, 2:37 PM CDT | Severe Thunderstorm Warning | MKX | 38 min |
| Nov 5, 9:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Nov 5, 11:10 AM CDT | Special Weather Statement | MKX | 50 min |
| Nov 5, 11:20 AM CDT | Severe Thunderstorm Warning | MKX | 40 min |
| Dec 2, 10:38 AM CST | Wind Advisory | MKX | 22 hr |
| Dec 6, 9:24 PM CST | Dense Fog Advisory | MKX | 13 hr |
| Dec 8, 3:07 AM CST | Winter Weather Advisory | MKX | 36 hr |
| Dec 10, 6:59 PM CST | Dense Fog Advisory | MKX | 5 hr |
| Dec 14, 2:29 AM CST | Winter Weather Advisory | MKX | 27 hr |
| Dec 19, 2:44 PM CST | Winter Storm Watch | MKX | 48 hr |
| Dec 21, 2:44 AM CST | Winter Weather Advisory | MKX | 12 hr |
| Dec 21, 2:27 PM CST | Winter Storm Warning | MKX | 47 hr |
| Dec 23, 12:41 PM CST | River Flood Warning | MKX | 21 hr |
| Dec 23, 1:38 PM CST | Winter Weather Advisory | MKX | 13 hr |
| Dec 24, 2:44 AM CST | Wind Chill Advisory | MKX | 31 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 | 22 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 17 |
| Special Weather Statement | 10 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 1 |
| Flood Watch | 2 |
| Winter | |
| Snow Squall Warning | 4 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 14 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.