Alert archive / Illinois / Clay County
Weather alerts in Clay County, Illinois, 2012
140 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clay County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 140
- Warnings
- 37
- Watches
- 18
- Advisories
- 29
- Busiest month
- September24 alerts
- Busiest day
- March 2, 20127 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 4 tornado warnings covering Clay County in 2012 had a tornado report inside them.
Clay County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 14 | 8 | 43% | 16 | 69% | 21 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Lincoln, IL: tornado warnings | 24 | 6 | 75% | 15 | 80% | 23 min |
| NWS Lincoln, IL: severe thunderstorm warnings | 132 | 58 | 56% | 177 | 66% | 19 min |
| NWS Lincoln, IL: flash flood warnings | 7 | 1 | 86% | 2 | 100% | 36 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 11, 10:59 AM CST | Winter Weather Advisory | ILX | 40 hr |
| Jan 17, 1:50 AM CST | Mesoscale Discussion | SPC | 85 min |
| Jan 17, 6:25 AM CST | Mesoscale Discussion | SPC | 65 min |
| Jan 17, 1:58 PM CST | River Flood Warning | ILX | 4 days |
| Jan 20, 3:50 AM CST | Winter Weather Advisory | ILX | 24 hr |
| Jan 20, 5:32 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 22, 5:37 PM CST | Mesoscale Discussion | SPC | 113 min |
| Jan 22, 8:25 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 22, 9:46 PM CST | Special Weather Statement | ILX | 29 min |
| Jan 23, 4:18 AM CST | River Flood Warning | ILX | 10 days |
| Feb 2, 12:07 AM CST | Dense Fog Advisory | ILX | 12 hr |
| Feb 5, 6:04 AM CST | River Flood Warning | ILX | 69 hr |
| Feb 6, 2:45 AM CST | Dense Fog Advisory | ILX | 9 hr |
| Feb 29, 12:49 AM CST | Mesoscale Discussion | SPC | 56 min |
| Feb 29, 1:14 AM CST | Tornado Watch | SPC | 11 hr |
| Feb 29, 3:53 AM CST | Mesoscale Discussion | SPC | 97 min |
| Mar 2, 3:41 AM CST | Wind Advisory | ILX | 16 hr |
| Mar 2, 4:25 AM CST | Mesoscale Discussion | SPC | 95 min |
| Mar 2, 5:52 AM CST | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 2, 7:50 AM CST | Mesoscale Discussion | SPC | 85 min |
| Mar 2, 9:54 AM CST | Tornado Watch | SPC | 6 hr |
| Mar 2, 11:22 AM CST | Severe Thunderstorm Warning | ILX | 26 min |
| Mar 2, 12:05 PM CST | Severe Thunderstorm Warning | ILX | 40 min |
| Mar 7, 3:45 AM CST | Wind Advisory | ILX | 14 hr |
| Mar 15, 1:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 18, 1:41 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Mar 23, 9:46 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Mar 23, 11:44 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 23, 1:28 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Mar 23, 2:08 PM CDT | Tornado Warning | ILX | 27 min |
| Mar 23, 2:28 PM CDT | Tornado Warning | ILX | 30 min |
| Mar 23, 2:53 PM CDT | Tornado Warning | ILX | 24 min |
| Mar 30, 1:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Mar 30, 2:51 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 30, 3:24 PM CDT | Severe Thunderstorm Warning | ILX | 54 min |
| Mar 30, 5:09 PM CDT | Special Weather Statement | ILX | 66 min |
| Mar 30, 7:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 9, 3:54 AM CDT | Red Flag Warning | ILX | 15 hr |
| Apr 9, 3:10 PM CDT | Freeze Watch | ILX | 13 hr |
| Apr 10, 3:44 AM CDT | Freeze Warning | ILX | 28 hr |
| Apr 11, 3:46 AM CDT | Freeze Warning | ILX | 28 hr |
| Apr 15, 3:10 AM CDT | Wind Advisory | ILX | 18 hr |
| Apr 25, 4:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 25, 7:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 25, 10:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 25, 11:55 PM CDT | Severe Thunderstorm Warning | ILX | 65 min |
| Apr 26, 2:38 AM CDT | Special Weather Statement | ILX | 37 min |
| Apr 28, 1:17 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 28, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 28, 2:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 28, 5:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 28, 6:45 PM CDT | Severe Thunderstorm Warning | ILX | 60 min |
| Apr 28, 7:23 PM CDT | Severe Thunderstorm Warning | ILX | 52 min |
| Apr 30, 12:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 1, 5:31 AM CDT | Dense Fog Advisory | ILX | 3 hr |
| May 2, 8:49 AM CDT | River Flood Warning | ILX | 44 hr |
| May 4, 8:47 AM CDT | Severe Thunderstorm Warning | ILX | 43 min |
| May 4, 11:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| May 4, 7:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| May 5, 1:36 AM CDT | Special Weather Statement | ILX | 54 min |
| May 5, 1:54 AM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| May 5, 9:23 AM CDT | River Flood Warning | ILX | 4 days |
| Jun 2, 1:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 11, 11:23 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 16, 8:23 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 16, 10:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 27, 3:04 AM CDT | Heat Advisory | ILX | 60 hr |
| Jun 27, 3:17 PM CDT | Red Flag Warning | ILX | 28 hr |
| Jun 29, 2:45 PM CDT | Excessive Heat Warning | ILX | 8 days |
| Jun 30, 5:55 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 2, 5:16 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 3:24 PM CDT | Heat Advisory | ILX | 3 days |
| Jul 22, 2:55 PM CDT | Heat Advisory | ILX | 3 days |
| Jul 24, 3:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 26, 3:24 AM CDT | Heat Advisory | ILX | 14 hr |
| Jul 26, 1:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 26, 1:46 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 26, 3:55 PM CDT | Mesoscale Discussion | SPC | 35 min |
| Jul 27, 12:52 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 12:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jul 31, 1:13 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 31, 3:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Aug 3, 2:32 PM CDT | Heat Advisory | ILX | 25 hr |
| Aug 8, 5:22 PM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| Aug 8, 5:32 PM CDT | Areal Flood Advisory | ILX | 3 hr |
| Aug 8, 6:14 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Aug 9, 7:40 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 16, 12:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 16, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 16, 3:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 16, 3:59 PM CDT | Tornado Warning | ILX | 46 min |
| Aug 16, 4:29 PM CDT | Severe Thunderstorm Warning | ILX | 61 min |
| Aug 16, 5:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 3:53 PM CDT | Tornado Watch | SPC | 5 hr |
| Aug 31, 6:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 31, 9:05 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Sep 1, 12:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Sep 1, 12:46 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 1, 3:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Sep 2, 9:13 AM CDT | River Flood Warning | ILX | 3 days |
| Sep 5, 9:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 5, 9:37 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 5, 9:52 AM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| Sep 5, 10:31 AM CDT | Severe Thunderstorm Warning | ILX | 59 min |
| Sep 6, 4:45 AM CDT | Dense Fog Advisory | ILX | 4 hr |
| Sep 7, 3:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 7, 6:29 PM CDT | Severe Thunderstorm Warning | ILX | 61 min |
| Sep 7, 7:29 PM CDT | Severe Thunderstorm Warning | ILX | 46 min |
| Sep 7, 7:39 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Sep 7, 8:13 PM CDT | Areal Flood Advisory | ILX | 3 hr |
| Sep 8, 5:45 AM CDT | River Flood Warning | ILX | 58 hr |
| Sep 21, 1:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Sep 21, 4:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 21, 6:30 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 23, 3:41 PM CDT | Frost Advisory | ILX | 16 hr |
| Sep 25, 12:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Sep 25, 12:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Sep 26, 8:54 AM CDT | Areal Flood Advisory | ILX | 6 hr |
| Sep 26, 9:30 AM CDT | River Flood Warning | ILX | 33 hr |
| Oct 7, 3:25 PM CDT | Frost Advisory | ILX | 17 hr |
| Oct 13, 3:02 PM CDT | Wind Advisory | ILX | 28 hr |
| Oct 17, 11:45 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Oct 17, 6:19 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Oct 31, 4:18 AM CDT | Freeze Warning | ILX | 28 hr |
| Nov 8, 4:28 AM CST | Dense Fog Advisory | ILX | 4 hr |
| Nov 11, 3:25 AM CST | Wind Advisory | ILX | 15 hr |
| Nov 20, 5:52 PM CST | Dense Fog Advisory | ILX | 20 hr |
| Nov 21, 10:54 PM CST | Dense Fog Advisory | ILX | 9 hr |
| Dec 7, 4:41 AM CST | Dense Fog Advisory | ILX | 4 hr |
| Dec 19, 3:57 PM CST | High Wind Warning | ILX | 32 hr |
| Dec 20, 11:56 PM CST | Wind Advisory | ILX | 6 hr |
| Dec 22, 8:08 AM CST | River Flood Warning | ILX | 20 hr |
| Dec 23, 2:48 PM CST | Winter Storm Watch | ILX | 37 hr |
| Dec 25, 3:41 AM CST | Winter Storm Warning | ILX | 9 hr |
| Dec 25, 12:19 PM CST | Blizzard Warning | ILX | 22 hr |
| Dec 26, 2:25 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 28, 1:51 PM CST | Winter Weather Advisory | ILX | 16 hr |
| Dec 28, 3:44 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 30, 4:50 AM CST | Dense Fog Advisory | ILX | 4 hr |
| Dec 31, 3:04 AM CST | Winter Weather Advisory | ILX | 27 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 | 12 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 52 |
| Special Weather Statement | 4 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 9 |
| Areal Flood Advisory | 3 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 2 |
| 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 archive20112013
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.