Alert archive / Iowa / Clayton County
Weather alerts in Clayton County, Iowa, 2025
98 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clayton County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 98
- Warnings
- 20
- Watches
- 13
- Advisories
- 34
- Busiest month
- July23 alerts
- Busiest day
- July 11, 20254 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clayton County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 9 | 3 | 67% | 6 | 50% | 27 min |
| Flash flood warnings | 3 | 1 | 67% | 1 | 100% | 100 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 20 | 4 | 80% | 20 | 40% | 14 min |
| NWS La Crosse, WI: severe thunderstorm warnings | 133 | 60 | 55% | 194 | 77% | 22 min |
| NWS La Crosse, WI: flash flood warnings | 13 | 8 | 38% | 18 | 89% | 55 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 17, 1:42 PM CST | Cold Weather Advisory | ARX | 3 days |
| Jan 19, 4:06 AM CST | Cold Weather Advisory | ARX | 31 hr |
| Jan 19, 1:55 PM CST | Extreme Cold Warning | ARX | 46 hr |
| Jan 31, 1:14 AM CST | Dense Fog Advisory | ARX | 5 hr |
| Feb 5, 8:22 PM CST | Winter Weather Advisory | ARX | 7 hr |
| Feb 11, 1:14 PM CST | Winter Storm Warning | ARX | 35 hr |
| Feb 13, 1:51 PM CST | Winter Weather Advisory | ARX | 50 hr |
| Feb 16, 3:11 AM CST | Cold Weather Advisory | ARX | 42 hr |
| Feb 16, 3:11 AM CST | Extreme Cold Watch | ARX | 24 hr |
| Feb 17, 3:25 AM CST | Extreme Cold Warning | ARX | 31 hr |
| Feb 18, 2:33 AM CST | Cold Weather Advisory | ARX | 33 hr |
| Feb 19, 2:43 AM CST | Cold Weather Advisory | ARX | 30 hr |
| Feb 27, 1:17 PM CST | Wind Advisory | ARX | 29 hr |
| Mar 4, 3:20 AM CST | Wind Advisory | ARX | 40 hr |
| Mar 4, 3:20 AM CST | Winter Weather Advisory | ARX | 39 hr |
| Mar 14, 2:56 AM CDT | Red Flag Warning | ARX | 17 hr |
| Mar 14, 5:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Mar 14, 5:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 14, 8:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Mar 14, 9:21 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Mar 14, 9:29 PM CDT | Special Weather Statement | ARX | 31 min |
| Mar 17, 3:39 AM CDT | Red Flag Warning | ARX | 16 hr |
| Mar 18, 2:17 PM CDT | Wind Advisory | ARX | 35 hr |
| Apr 17, 7:49 AM CDT | Special Weather Statement | ARX | 26 min |
| Apr 18, 4:34 AM CDT | Severe Thunderstorm Warning | ARX | 41 min |
| Apr 18, 5:05 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 5:53 AM CDT | Severe Thunderstorm Warning | ARX | 37 min |
| Apr 23, 9:04 PM CDT | Special Weather Statement | ARX | 26 min |
| Apr 23, 9:25 PM CDT | Special Weather Statement | ARX | 35 min |
| Apr 23, 11:21 PM CDT | Special Weather Statement | ARX | 54 min |
| Apr 28, 2:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 3:21 PM CDT | Wind Advisory | ARX | 6 hr |
| Jun 11, 2:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 11, 4:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 11, 6:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 11, 7:34 PM CDT | Severe Thunderstorm Warning | ARX | 41 min |
| Jun 11, 8:03 PM CDT | Severe Thunderstorm Warning | ARX | 23 min |
| Jun 11, 8:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 18, 1:49 PM CDT | Extreme Heat Watch | ARX | 37 hr |
| Jun 20, 12:44 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 2:51 AM CDT | Heat Advisory | ARX | 4 days |
| Jun 23, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 26, 1:44 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 29, 12:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 5:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 3, 2:18 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 6:09 PM CDT | Special Weather Statement | ARX | 51 min |
| Jul 5, 2:07 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 12:55 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 11, 1:13 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 3:13 PM CDT | Areal Flood Advisory | ARX | 3 hr |
| Jul 11, 4:11 PM CDT | Severe Thunderstorm Warning | ARX | 49 min |
| Jul 11, 4:46 PM CDT | Flash Flood Warning | ARX | 119 min |
| Jul 19, 1:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 19, 5:29 AM CDT | Special Weather Statement | ARX | 61 min |
| Jul 22, 1:24 PM CDT | Heat Advisory | ARX | 31 hr |
| Jul 23, 1:18 AM CDT | Special Weather Statement | ARX | 42 min |
| Jul 23, 2:00 AM CDT | Special Weather Statement | ARX | 45 min |
| Jul 23, 2:44 AM CDT | Special Weather Statement | ARX | 46 min |
| Jul 23, 3:44 AM CDT | Flash Flood Warning | ARX | 3 hr |
| Jul 27, 12:42 AM CDT | Dense Fog Advisory | ARX | 8 hr |
| Jul 27, 2:15 PM CDT | Heat Advisory | ARX | 30 hr |
| Jul 28, 1:18 AM CDT | Severe Thunderstorm Warning | ARX | 57 min |
| Jul 28, 2:03 AM CDT | Severe Thunderstorm Warning | ARX | 36 min |
| Jul 28, 10:07 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 29, 12:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 30, 2:09 AM CDT | Severe Thunderstorm Warning | ARX | 51 min |
| Aug 8, 2:07 PM CDT | Flood Watch | ARX | 53 hr |
| Aug 9, 10:03 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 10, 5:10 PM CDT | Flash Flood Warning | ARX | 3 hr |
| Aug 15, 1:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 15, 2:16 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 15, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 16, 3:07 AM CDT | Heat Advisory | ARX | 17 hr |
| Aug 16, 8:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 17, 6:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 2:37 PM CDT | River Flood Watch | ARX | 62 hr |
| Aug 18, 8:19 PM CDT | River Flood Watch | ARX | 34 hr |
| Aug 19, 1:32 AM CDT | Dense Fog Advisory | ARX | 7 hr |
| Aug 19, 6:47 AM CDT | River Flood Warning | ARX | 44 hr |
| Sep 22, 7:29 PM CDT | Severe Thunderstorm Warning | ARX | 46 min |
| Oct 22, 2:01 AM CDT | Frost Advisory | ARX | 31 hr |
| Oct 23, 2:51 AM CDT | Freeze Warning | ARX | 30 hr |
| Nov 2, 1:52 AM CDT | Dense Fog Advisory | ARX | 7 hr |
| Nov 24, 11:31 PM CST | Dense Fog Advisory | ARX | 10 hr |
| Nov 25, 2:46 AM CST | Wind Advisory | ARX | 36 hr |
| Nov 27, 2:48 AM CST | Winter Storm Watch | ARX | 24 hr |
| Nov 27, 2:31 PM CST | Winter Storm Warning | ARX | 63 hr |
| Nov 28, 2:39 AM CST | Winter Weather Advisory | ARX | 57 hr |
| Dec 5, 1:10 PM CST | Winter Weather Advisory | ARX | 38 hr |
| Dec 8, 2:59 PM CST | Winter Weather Advisory | ARX | 41 hr |
| Dec 11, 1:31 PM CST | Cold Weather Advisory | ARX | 68 hr |
| Dec 17, 1:22 PM CST | Wind Advisory | ARX | 35 hr |
| Dec 18, 11:22 AM CST | Winter Weather Advisory | ARX | 13 hr |
| Dec 24, 10:02 PM CST | Dense Fog Advisory | ARX | 8 hr |
| Dec 26, 1:38 AM CST | Dense Fog Advisory | ARX | 9 hr |
| Dec 26, 4:44 PM CST | Dense Fog Advisory | ARX | 42 hr |
| Dec 27, 3:38 AM CST | Winter Weather Advisory | ARX | 56 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 archive20242026
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.