Alert archive / Iowa / Clayton County
Weather alerts in Clayton County, Iowa, 2014
165 weather alerts in 2014, 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 2014. Tap one for its archive.
- Alerts
- 165
- Warnings
- 40
- Watches
- 27
- Advisories
- 46
- Busiest month
- June51 alerts
- Busiest day
- June 30, 201414 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 2014 had a tornado report inside them.
Clayton County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 9 | 5 | 44% | 7 | 100% | 31 min |
| Flash flood warnings | 7 | 7 | 0% | 3 | 100% | 97 min |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 5 | 1 | 80% | 1 | 100% | 1 min |
| NWS La Crosse, WI: severe thunderstorm warnings | 137 | 84 | 39% | 219 | 81% | 23 min |
| NWS La Crosse, WI: flash flood warnings | 19 | 12 | 37% | 35 | 89% | 102 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 3, 4:29 AM CST | Wind Chill Warning | ARX | 4 days |
| Jan 3, 10:12 AM CST | Winter Weather Advisory | ARX | 22 hr |
| Jan 7, 3:06 AM CST | Wind Chill Advisory | ARX | 30 hr |
| Jan 9, 3:13 PM CST | Winter Weather Advisory | ARX | 39 hr |
| Jan 10, 4:55 AM CST | Dense Fog Advisory | ARX | 7 hr |
| Jan 13, 3:58 AM CST | Winter Weather Advisory | ARX | 41 hr |
| Jan 17, 4:05 AM CST | Winter Weather Advisory | ARX | 35 hr |
| Jan 20, 3:12 AM CST | Wind Chill Advisory | ARX | 33 hr |
| Jan 22, 3:34 AM CST | Wind Chill Advisory | ARX | 50 hr |
| Jan 24, 3:33 PM CST | Winter Storm Watch | ARX | 24 hr |
| Jan 25, 3:44 AM CST | Winter Weather Advisory | ARX | 27 hr |
| Jan 25, 3:36 PM CST | Wind Chill Watch | ARX | 13 hr |
| Jan 25, 3:36 PM CST | Winter Storm Warning | ARX | 34 hr |
| Jan 26, 4:16 AM CST | Wind Chill Warning | ARX | 56 hr |
| Jan 26, 4:16 AM CST | Wind Chill Advisory | ARX | 11 hr |
| Jan 26, 4:45 PM CST | Blizzard Warning | ARX | 9 hr |
| Jan 28, 2:38 AM CST | Wind Chill Advisory | ARX | 31 hr |
| Feb 1, 2:32 PM CST | Wind Chill Advisory | ARX | 19 hr |
| Feb 5, 3:42 AM CST | Wind Chill Advisory | ARX | 32 hr |
| Feb 6, 11:41 AM CST | Wind Chill Advisory | ARX | 21 hr |
| Feb 9, 3:00 AM CST | Wind Chill Advisory | ARX | 32 hr |
| Feb 16, 3:10 AM CST | Winter Storm Warning | ARX | 39 hr |
| Feb 16, 3:10 AM CST | Winter Weather Advisory | ARX | 11 hr |
| Feb 18, 4:13 AM CST | Winter Storm Watch | ARX | 35 hr |
| Feb 19, 4:47 AM CST | Winter Storm Warning | ARX | 55 hr |
| Feb 19, 4:47 AM CST | Winter Weather Advisory | ARX | 61 hr |
| Feb 25, 3:42 AM CST | Wind Chill Advisory | ARX | 31 hr |
| Feb 26, 3:13 PM CST | Wind Chill Advisory | ARX | 21 hr |
| Feb 27, 3:09 PM CST | Wind Chill Advisory | ARX | 18 hr |
| Mar 1, 3:08 PM CST | Wind Chill Advisory | ARX | 21 hr |
| Mar 2, 11:56 AM CST | Wind Chill Advisory | ARX | 21 hr |
| Mar 4, 11:56 AM CST | Winter Weather Advisory | ARX | 20 hr |
| Mar 20, 5:58 AM CDT | Dense Fog Advisory | ARX | 5 hr |
| Mar 24, 5:57 PM CDT | Special Weather Statement | ARX | 2 hr |
| Mar 27, 10:01 PM CDT | Areal Flood Advisory | ARX | 6 hr |
| Mar 28, 6:11 AM CDT | River Flood Warning | ARX | 59 hr |
| Mar 31, 6:43 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 9, 2:30 AM CDT | Red Flag Warning | ARX | 17 hr |
| Apr 12, 2:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 12, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 12, 4:05 PM CDT | Special Weather Statement | ARX | 70 min |
| Apr 12, 5:39 PM CDT | Severe Thunderstorm Warning | ARX | 66 min |
| Apr 12, 6:07 PM CDT | Special Weather Statement | ARX | 83 min |
| Apr 12, 6:20 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Apr 12, 7:56 PM CDT | Severe Thunderstorm Warning | ARX | 49 min |
| Apr 12, 8:35 PM CDT | Special Weather Statement | ARX | 85 min |
| Apr 12, 8:40 PM CDT | Severe Thunderstorm Warning | ARX | 50 min |
| Apr 12, 9:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 12, 9:37 PM CDT | Severe Thunderstorm Warning | ARX | 23 min |
| Apr 12, 9:38 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 12, 9:44 PM CDT | Severe Thunderstorm Warning | ARX | 31 min |
| Apr 12, 10:17 PM CDT | Special Weather Statement | ARX | 88 min |
| Apr 12, 10:41 PM CDT | Areal Flood Advisory | ARX | 3 hr |
| Apr 12, 11:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 13, 1:48 AM CDT | Areal Flood Advisory | ARX | 117 min |
| Apr 13, 3:56 AM CDT | Flood Watch | ARX | 21 hr |
| Apr 13, 10:15 AM CDT | River Flood Warning | ARX | 9 days |
| Apr 13, 8:22 PM CDT | Areal Flood Warning | ARX | 3 hr |
| Apr 25, 7:03 AM CDT | Dense Fog Advisory | ARX | 117 min |
| Apr 27, 8:35 AM CDT | Special Weather Statement | ARX | 55 min |
| Apr 27, 10:56 AM CDT | River Flood Watch | ARX | 23 hr |
| Apr 27, 10:56 AM CDT | River Flood Watch | ARX | 23 hr |
| Apr 27, 4:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 28, 11:04 AM CDT | River Flood Watch | ARX | 58 hr |
| Apr 28, 11:04 AM CDT | River Flood Watch | ARX | 3 days |
| Apr 30, 8:42 PM CDT | River Flood Warning | ARX | 23 days |
| May 1, 11:01 AM CDT | River Flood Warning | ARX | 22 days |
| May 8, 5:34 PM CDT | Special Weather Statement | ARX | 56 min |
| May 8, 8:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 11, 3:39 PM CDT | Flood Watch | ARX | 6 hr |
| May 11, 9:24 PM CDT | Flash Flood Watch | ARX | 22 hr |
| May 12, 1:10 AM CDT | Special Weather Statement | ARX | 65 min |
| May 12, 1:59 AM CDT | Special Weather Statement | ARX | 76 min |
| May 12, 6:46 AM CDT | Special Weather Statement | ARX | 119 min |
| May 12, 3:49 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 16, 2:24 PM CDT | Frost Advisory | ARX | 17 hr |
| Jun 7, 11:21 AM CDT | Special Weather Statement | ARX | 54 min |
| Jun 7, 12:58 PM CDT | Special Weather Statement | ARX | 32 min |
| Jun 7, 1:00 PM CDT | Special Weather Statement | ARX | 60 min |
| Jun 16, 5:10 PM CDT | Flash Flood Watch | ARX | 9 hr |
| Jun 16, 5:10 PM CDT | Mesoscale Discussion | SPC | 35 min |
| Jun 16, 5:46 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 16, 8:46 PM CDT | Severe Thunderstorm Warning | ARX | 59 min |
| Jun 16, 9:01 PM CDT | Tornado Warning | ARX | 29 min |
| Jun 16, 9:38 PM CDT | Severe Thunderstorm Warning | ARX | 52 min |
| Jun 17, 2:44 PM CDT | Flash Flood Watch | ARX | 54 hr |
| Jun 17, 10:13 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 3:07 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 18, 3:47 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 18, 5:07 AM CDT | Special Weather Statement | ARX | 38 min |
| Jun 18, 5:36 AM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 18, 5:45 AM CDT | Special Weather Statement | ARX | 60 min |
| Jun 18, 8:14 PM CDT | River Flood Warning | ARX | 22 days |
| Jun 18, 11:41 PM CDT | Flash Flood Warning | ARX | 2 hr |
| Jun 19, 2:02 AM CDT | Flash Flood Warning | ARX | 6 hr |
| Jun 19, 5:27 AM CDT | River Flood Warning | ARX | 4 days |
| Jun 19, 5:27 AM CDT | River Flood Warning | ARX | 3 days |
| Jun 19, 7:40 AM CDT | Flash Flood Warning | ARX | 6 hr |
| Jun 19, 1:26 PM CDT | Flash Flood Warning | ARX | 3 hr |
| Jun 19, 1:47 PM CDT | Special Weather Statement | ARX | 88 min |
| Jun 19, 2:42 PM CDT | Special Weather Statement | ARX | 2 hr |
| Jun 19, 3:41 PM CDT | River Flood Warning | ARX | 6 days |
| Jun 19, 4:44 PM CDT | Flash Flood Warning | ARX | 3 hr |
| Jun 19, 7:55 PM CDT | Areal Flood Warning | ARX | 12 hr |
| Jun 20, 7:22 AM CDT | Areal Flood Warning | ARX | 6 hr |
| Jun 22, 3:59 AM CDT | Flash Flood Watch | ARX | 16 hr |
| Jun 22, 11:19 AM CDT | Mesoscale Discussion | SPC | 101 min |
| Jun 22, 11:54 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 12:23 PM CDT | Special Weather Statement | ARX | 112 min |
| Jun 22, 2:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 27, 10:43 AM CDT | River Flood Warning | ARX | 13 days |
| Jun 27, 3:12 PM CDT | Special Weather Statement | ARX | 63 min |
| Jun 28, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 29, 7:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 29, 8:15 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 29, 9:00 PM CDT | River Flood Warning | ARX | 52 hr |
| Jun 29, 9:34 PM CDT | Flash Flood Warning | ARX | 3 hr |
| Jun 29, 9:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 30, 3:03 AM CDT | Flash Flood Watch | ARX | 16 hr |
| Jun 30, 12:18 PM CDT | River Flood Warning | ARX | 3 days |
| Jun 30, 1:52 PM CDT | Special Weather Statement | ARX | 83 min |
| Jun 30, 2:03 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 30, 2:44 PM CDT | Severe Thunderstorm Warning | ARX | 61 min |
| Jun 30, 3:00 PM CDT | Flash Flood Warning | ARX | 5 hr |
| Jun 30, 3:13 PM CDT | Severe Thunderstorm Warning | ARX | 77 min |
| Jun 30, 3:25 PM CDT | Mesoscale Discussion | SPC | 35 min |
| Jun 30, 4:34 PM CDT | High Wind Warning | ARX | 2 hr |
| Jul 6, 4:44 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jul 6, 7:26 PM CDT | Special Weather Statement | ARX | 94 min |
| Jul 7, 4:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 22, 3:09 AM CDT | Heat Advisory | ARX | 16 hr |
| Aug 5, 1:22 AM CDT | Dense Fog Advisory | ARX | 8 hr |
| Aug 17, 4:46 AM CDT | Dense Fog Advisory | ARX | 4 hr |
| Aug 18, 2:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 18, 6:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 18, 7:44 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 18, 9:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Aug 18, 10:58 PM CDT | Special Weather Statement | ARX | 62 min |
| Aug 19, 12:34 AM CDT | Special Weather Statement | ARX | 86 min |
| Aug 21, 5:15 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 21, 7:26 AM CDT | Special Weather Statement | ARX | 34 min |
| Aug 21, 7:55 AM CDT | Special Weather Statement | ARX | 65 min |
| Aug 21, 9:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 23, 4:34 AM CDT | Dense Fog Advisory | ARX | 5 hr |
| Aug 29, 3:02 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 9:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 31, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 8, 3:40 PM CDT | Special Weather Statement | ARX | 50 min |
| Sep 9, 3:38 AM CDT | Flash Flood Watch | ARX | 28 hr |
| Oct 4, 2:33 PM CDT | Frost Advisory | ARX | 17 hr |
| Oct 9, 3:02 PM CDT | Frost Advisory | ARX | 18 hr |
| Oct 10, 3:13 PM CDT | Freeze Warning | ARX | 18 hr |
| Oct 16, 4:18 AM CDT | Dense Fog Advisory | ARX | 6 hr |
| Oct 23, 3:08 PM CDT | Dense Fog Advisory | ARX | 21 hr |
| Oct 24, 9:19 PM CDT | Dense Fog Advisory | ARX | 7 hr |
| Nov 14, 11:50 AM CST | Winter Weather Advisory | ARX | 36 hr |
| Nov 21, 4:22 AM CST | Freezing Rain Advisory | ARX | 26 hr |
| Nov 22, 9:22 AM CST | Dense Fog Advisory | ARX | 5 hr |
| Nov 23, 2:53 PM CST | Winter Weather Advisory | ARX | 31 hr |
| Nov 24, 3:13 PM CST | Special Weather Statement | ARX | 77 min |
| Nov 24, 3:57 PM CST | Special Weather Statement | ARX | 78 min |
| Dec 12, 5:40 AM CST | Freezing Fog Advisory | ARX | 4 hr |
| Dec 13, 2:58 AM CST | Dense Fog Advisory | ARX | 63 hr |
| Dec 13, 2:39 PM CST | Dense Fog Advisory | ARX | 44 hr |
| Dec 20, 11:41 PM CST | Dense Fog Advisory | ARX | 11 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 archive20132015
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.