Alert archive / Wisconsin / Iowa County
Weather alerts in Iowa County, Wisconsin, 2021
104 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Iowa County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 104
- Warnings
- 20
- Watches
- 11
- Advisories
- 34
- Busiest month
- August31 alerts
- Busiest day
- August 11, 20218 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 4 tornado warnings covering Iowa County in 2021 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 21 minutes after it went out.
Iowa County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 2 | 50% | 2 | 100% | 21 min |
| Severe thunderstorm warnings | 14 | 6 | 57% | 7 | 71% | 32 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Milwaukee, WI: tornado warnings | 16 | 5 | 69% | 20 | 45% | 13 min |
| NWS Milwaukee, WI: severe thunderstorm warnings | 89 | 41 | 54% | 168 | 71% | 28 min |
| NWS Milwaukee, WI: flash flood warnings | 2 | 0 | 100% | 0 |
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 2, 2:24 PM CST | Dense Fog Advisory | MKX | 22 hr |
| Jan 3, 2:23 PM CST | Dense Fog Advisory | MKX | 28 hr |
| Jan 5, 5:33 PM CST | Dense Fog Advisory | MKX | 18 hr |
| Jan 6, 2:45 PM CST | Dense Fog Advisory | MKX | 22 hr |
| Jan 13, 2:25 PM CST | Winter Weather Advisory | MKX | 39 hr |
| Jan 16, 10:57 PM CST | Winter Weather Advisory | MKX | 13 hr |
| Jan 22, 2:45 PM CST | Winter Weather Advisory | MKX | 45 hr |
| Jan 25, 3:17 AM CST | Winter Weather Advisory | MKX | 35 hr |
| Jan 29, 2:28 PM CST | Winter Weather Advisory | MKX | 46 hr |
| Feb 3, 3:05 AM CST | Winter Storm Watch | MKX | 11 hr |
| Feb 3, 3:05 AM CST | Winter Weather Advisory | MKX | 57 hr |
| Feb 6, 3:25 AM CST | Wind Chill Advisory | MKX | 33 hr |
| Feb 8, 2:30 PM CST | Wind Chill Advisory | MKX | 19 hr |
| Feb 10, 9:00 PM CST | Wind Chill Advisory | MKX | 12 hr |
| Feb 12, 2:00 PM CST | Wind Chill Advisory | MKX | 22 hr |
| Feb 13, 2:21 AM CST | Wind Chill Advisory | MKX | 58 hr |
| Feb 21, 3:32 AM CST | Winter Weather Advisory | MKX | 17 hr |
| Feb 26, 2:57 AM CST | Dense Fog Advisory | MKX | 5 hr |
| Feb 28, 3:27 AM CST | Dense Fog Advisory | MKX | 9 hr |
| Mar 14, 3:52 AM CDT | Winter Weather Advisory | MKX | 44 hr |
| Mar 29, 3:02 AM CDT | Wind Advisory | MKX | 17 hr |
| Apr 30, 3:02 PM CDT | Fire Weather Watch | MKX | 13 hr |
| May 1, 10:48 AM CDT | Red Flag Warning | MKX | 9 hr |
| May 2, 4:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| May 7, 1:48 PM CDT | Frost Advisory | MKX | 17 hr |
| May 10, 1:45 PM CDT | Frost Advisory | MKX | 18 hr |
| May 11, 1:53 PM CDT | Frost Advisory | MKX | 18 hr |
| May 28, 10:26 AM CDT | Frost Advisory | MKX | 21 hr |
| Jun 17, 6:46 AM CDT | Special Weather Statement | MKX | 44 min |
| Jun 17, 2:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 17, 10:01 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 1:34 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 18, 2:47 AM CDT | Special Weather Statement | MKX | 28 min |
| Jun 24, 10:13 AM CDT | Special Weather Statement | MKX | 47 min |
| Jul 6, 5:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 14, 7:02 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 11:45 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 12:22 PM CDT | Special Weather Statement | MKX | 53 min |
| Jul 14, 5:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 14, 6:13 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 14, 9:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 27, 7:48 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 27, 7:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 28, 12:12 AM CDT | Special Weather Statement | MKX | 63 min |
| Jul 28, 12:50 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Jul 28, 1:12 AM CDT | Special Weather Statement | MKX | 63 min |
| Jul 28, 1:52 AM CDT | Special Weather Statement | MKX | 53 min |
| Jul 28, 7:17 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 28, 11:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 29, 12:51 AM CDT | Severe Thunderstorm Warning | MKX | 39 min |
| Jul 31, 1:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 11:03 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 3:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 7, 4:33 PM CDT | Severe Thunderstorm Warning | MKX | 57 min |
| Aug 7, 4:36 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 7, 4:38 PM CDT | Tornado Warning | MKX | 67 min |
| Aug 7, 5:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Aug 7, 5:33 PM CDT | Tornado Warning | MKX | 57 min |
| Aug 9, 1:21 PM CDT | Heat Advisory | MKX | 30 hr |
| Aug 10, 2:16 PM CDT | Heat Advisory | MKX | 29 hr |
| Aug 10, 3:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 3:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 4:02 PM CDT | Severe Thunderstorm Warning | MKX | 73 min |
| Aug 10, 4:25 PM CDT | Severe Thunderstorm Warning | MKX | 80 min |
| Aug 10, 5:08 PM CDT | Severe Thunderstorm Warning | MKX | 67 min |
| Aug 10, 5:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 11, 11:48 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 11, 12:17 PM CDT | Tornado Watch | SPC | 8 hr |
| Aug 11, 4:22 PM CDT | Severe Thunderstorm Warning | MKX | 53 min |
| Aug 11, 5:05 PM CDT | Special Weather Statement | MKX | 25 min |
| Aug 11, 5:10 PM CDT | Severe Thunderstorm Warning | MKX | 50 min |
| Aug 11, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 11, 5:58 PM CDT | Special Weather Statement | MKX | 47 min |
| Aug 11, 6:04 PM CDT | Tornado Warning | MKX | 41 min |
| Aug 24, 6:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Aug 24, 12:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 24, 4:18 PM CDT | Severe Thunderstorm Warning | MKX | 27 min |
| Aug 27, 8:57 AM CDT | Severe Thunderstorm Warning | MKX | 48 min |
| Aug 27, 5:15 PM CDT | Tornado Watch | SPC | 6 hr |
| Aug 27, 7:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 9:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 28, 3:26 AM CDT | Special Weather Statement | MKX | 49 min |
| Sep 7, 10:40 AM CDT | Special Weather Statement | MKX | 65 min |
| Sep 13, 1:41 AM CDT | Special Weather Statement | MKX | 34 min |
| Sep 13, 2:15 AM CDT | Severe Thunderstorm Warning | MKX | 45 min |
| Sep 13, 6:11 AM CDT | Severe Thunderstorm Warning | MKX | 28 min |
| Sep 20, 7:22 PM CDT | Severe Thunderstorm Warning | MKX | 38 min |
| Sep 20, 7:59 PM CDT | Special Weather Statement | MKX | 31 min |
| Sep 20, 9:22 PM CDT | Severe Thunderstorm Warning | MKX | 38 min |
| Sep 20, 9:24 PM CDT | Tornado Warning | MKX | 24 min |
| Oct 7, 8:22 PM CDT | Dense Fog Advisory | MKX | 14 hr |
| Oct 8, 11:23 PM CDT | Dense Fog Advisory | MKX | 12 hr |
| Oct 21, 2:31 PM CDT | Frost Advisory | MKX | 17 hr |
| Oct 22, 2:37 PM CDT | Frost Advisory | MKX | 17 hr |
| Dec 5, 12:29 PM CST | Wind Advisory | MKX | 28 hr |
| Dec 14, 2:34 AM CST | High Wind Watch | MKX | 25 hr |
| Dec 15, 3:33 AM CST | High Wind Warning | MKX | 29 hr |
| Dec 15, 4:51 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 15, 5:30 PM CST | Tornado Watch | SPC | 6 hr |
| Dec 15, 9:28 PM CST | Severe Thunderstorm Warning | MKX | 77 min |
| Dec 24, 3:21 PM CST | Dense Fog Advisory | MKX | 10 hr |
| Dec 27, 2:34 PM CST | Winter Weather Advisory | MKX | 35 hr |
| Dec 28, 8:59 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 31, 11:33 AM CST | Winter Weather Advisory | MKX | 14 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 | 14 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 13 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 10 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Frost Advisory | 6 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 2 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe 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. Warning verification from the Mesonet's Cow. Rebuilt daily.