Alert archive / Iowa / Clayton County
Weather alerts in Clayton County, Iowa, 2022
95 weather alerts in 2022, 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 2022. Tap one for its archive.
- Alerts
- 95
- Warnings
- 16
- Watches
- 9
- Advisories
- 35
- Busiest month
- July28 alerts
- Busiest day
- July 5, 202212 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Clayton County in 2022 had a tornado report inside them.
Clayton County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 10 | 2 | 80% | 6 | 100% | 14 min |
| Flash flood warnings | 1 | 1 | 0% | 2 | 50% | 47 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 21 | 7 | 67% | 19 | 53% | 11 min |
| NWS La Crosse, WI: severe thunderstorm warnings | 129 | 66 | 49% | 218 | 70% | 22 min |
| NWS La Crosse, WI: flash flood warnings | 9 | 5 | 44% | 10 | 60% | 65 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 |
|---|---|---|---|
| Dec 31, 9:34 PM CST | Winter Weather Advisory | ARX | 26 hr |
| Jan 4, 3:18 AM CST | Winter Weather Advisory | ARX | 39 hr |
| Jan 5, 3:34 AM CST | Wind Chill Advisory | ARX | 53 hr |
| Jan 8, 2:03 PM CST | Winter Weather Advisory | ARX | 10 hr |
| Jan 13, 2:40 PM CST | Winter Weather Advisory | ARX | 36 hr |
| Jan 19, 2:29 AM CST | Wind Chill Advisory | ARX | 34 hr |
| Jan 20, 11:55 AM CST | Wind Chill Advisory | ARX | 24 hr |
| Jan 22, 3:04 AM CST | Winter Weather Advisory | ARX | 25 hr |
| Jan 24, 3:14 AM CST | Wind Chill Advisory | ARX | 57 hr |
| Jan 25, 2:59 AM CST | Wind Chill Warning | ARX | 33 hr |
| Feb 18, 2:54 AM CST | Wind Advisory | ARX | 24 hr |
| Feb 20, 3:12 PM CST | Winter Weather Advisory | ARX | 51 hr |
| Feb 23, 4:22 PM CST | Winter Weather Advisory | ARX | 35 hr |
| Mar 5, 12:04 PM CST | Wind Advisory | ARX | 18 hr |
| Mar 5, 3:42 PM CST | Special Weather Statement | ARX | 48 min |
| Mar 5, 6:53 PM CST | Special Weather Statement | ARX | 52 min |
| Mar 5, 7:29 PM CST | Special Weather Statement | ARX | 31 min |
| Mar 5, 8:11 PM CST | Severe Thunderstorm Warning | ARX | 34 min |
| Mar 6, 2:52 PM CST | Winter Weather Advisory | ARX | 19 hr |
| Mar 24, 9:01 PM CDT | Wind Advisory | ARX | 25 hr |
| Apr 1, 2:11 PM CDT | Winter Weather Advisory | ARX | 20 hr |
| Apr 12, 7:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 12:32 AM CDT | Special Weather Statement | ARX | 28 min |
| Apr 13, 2:30 PM CDT | Wind Advisory | ARX | 29 hr |
| Apr 23, 3:26 AM CDT | Wind Advisory | ARX | 18 hr |
| Apr 30, 2:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| May 9, 6:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 9, 7:36 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 9, 9:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 9, 10:50 PM CDT | Special Weather Statement | ARX | 55 min |
| May 9, 11:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 10, 4:22 PM CDT | Special Weather Statement | ARX | 23 min |
| May 10, 4:55 PM CDT | Special Weather Statement | ARX | 35 min |
| May 31, 1:44 AM CDT | Special Weather Statement | ARX | 46 min |
| Jun 11, 12:58 PM CDT | Special Weather Statement | ARX | 32 min |
| Jun 13, 3:36 AM CDT | Heat Advisory | ARX | 40 hr |
| Jun 13, 9:06 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 15, 3:42 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 15, 1:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 15, 2:28 PM CDT | Tornado Watch | SPC | 10 hr |
| Jun 15, 5:09 PM CDT | Severe Thunderstorm Warning | ARX | 36 min |
| Jun 15, 5:17 PM CDT | Tornado Warning | ARX | 20 min |
| Jun 20, 2:32 PM CDT | Heat Advisory | ARX | 28 hr |
| Jun 28, 8:18 PM CDT | Severe Thunderstorm Warning | ARX | 42 min |
| Jun 28, 8:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 4, 7:54 AM CDT | Special Weather Statement | ARX | 66 min |
| Jul 4, 9:01 AM CDT | Special Weather Statement | ARX | 59 min |
| Jul 4, 2:38 PM CDT | Heat Advisory | ARX | 29 hr |
| Jul 4, 6:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 4, 7:26 PM CDT | Severe Thunderstorm Warning | ARX | 49 min |
| Jul 4, 8:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 8:11 PM CDT | Severe Thunderstorm Warning | ARX | 49 min |
| Jul 4, 8:49 PM CDT | Severe Thunderstorm Warning | ARX | 32 min |
| Jul 4, 8:53 PM CDT | Severe Thunderstorm Warning | ARX | 52 min |
| Jul 4, 9:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 5, 3:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 5, 4:34 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 5:45 PM CDT | Special Weather Statement | ARX | 90 min |
| Jul 5, 6:17 PM CDT | Flood Watch | ARX | 7 hr |
| Jul 5, 6:24 PM CDT | Severe Thunderstorm Warning | ARX | 51 min |
| Jul 5, 6:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 5, 8:41 PM CDT | Flash Flood Warning | ARX | 5 hr |
| Jul 5, 8:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 15, 7:56 AM CDT | Areal Flood Advisory | ARX | 2 hr |
| Jul 22, 10:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 23, 3:35 AM CDT | Heat Advisory | ARX | 16 hr |
| Jul 23, 10:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 23, 11:34 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 23, 2:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 23, 8:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 23, 11:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 11:53 PM CDT | Severe Thunderstorm Warning | ARX | 52 min |
| Jul 24, 12:00 AM CDT | Severe Thunderstorm Warning | ARX | 40 min |
| Aug 6, 2:54 AM CDT | Heat Advisory | ARX | 16 hr |
| Aug 6, 2:39 PM CDT | Flood Watch | ARX | 37 hr |
| Aug 6, 9:19 PM CDT | Special Weather Statement | ARX | 71 min |
| Aug 15, 4:22 AM CDT | Dense Fog Advisory | ARX | 6 hr |
| Aug 24, 5:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 27, 1:51 PM CDT | Frost Advisory | ARX | 18 hr |
| Sep 28, 2:08 PM CDT | Frost Advisory | ARX | 18 hr |
| Oct 7, 2:41 AM CDT | Freeze Warning | ARX | 29 hr |
| Oct 12, 12:46 PM CDT | Wind Advisory | ARX | 6 hr |
| Nov 10, 11:47 AM CST | Mesoscale Discussion | SPC | 88 min |
| Nov 10, 1:13 PM CST | Special Weather Statement | ARX | 47 min |
| Nov 10, 2:12 PM CST | Special Weather Statement | ARX | 63 min |
| Dec 2, 3:17 AM CST | Wind Advisory | ARX | 26 hr |
| Dec 5, 3:59 AM CST | Winter Weather Advisory | ARX | 7 hr |
| Dec 7, 3:25 AM CST | Dense Fog Advisory | ARX | 7 hr |
| Dec 7, 2:32 PM CST | Winter Weather Advisory | ARX | 48 hr |
| Dec 9, 9:31 PM CST | Dense Fog Advisory | ARX | 11 hr |
| Dec 19, 2:34 PM CST | Winter Storm Watch | ARX | 24 hr |
| Dec 20, 2:48 PM CST | Winter Storm Warning | ARX | 4 days |
| Dec 21, 11:13 AM CST | Blizzard Warning | ARX | 67 hr |
| Dec 24, 3:27 AM CST | Wind Chill Advisory | ARX | 31 hr |
| Dec 25, 10:58 AM CST | Winter Weather Advisory | ARX | 19 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 | 10 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 15 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
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.