Alert archive / Illinois / Jackson County
Weather alerts in Jackson County, Illinois, 2021
126 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jackson County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 126
- Warnings
- 30
- Watches
- 21
- Advisories
- 36
- Busiest month
- March20 alerts
- Busiest day
- July 10, 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.
0 of 2 tornado warnings covering Jackson County in 2021 had a tornado report inside them.
Jackson County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 9 | 5 | 44% | 7 | 71% | 15 min |
| Flash flood warnings | 3 | 1 | 67% | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Paducah, KY: tornado warnings | 51 | 16 | 69% | 33 | 52% | 19 min |
| NWS Paducah, KY: severe thunderstorm warnings | 123 | 42 | 66% | 144 | 49% | 17 min |
| NWS Paducah, KY: flash flood warnings | 65 | 29 | 55% | 52 | 83% | 97 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 4, 5:30 AM CST | Dense Fog Advisory | PAH | 5 hr |
| Jan 25, 9:24 PM CST | Dense Fog Advisory | PAH | 12 hr |
| Jan 26, 8:48 PM CST | Winter Weather Advisory | PAH | 25 hr |
| Feb 8, 3:54 AM CST | Winter Weather Advisory | PAH | 26 hr |
| Feb 8, 2:47 PM CST | Winter Storm Watch | PAH | 24 hr |
| Feb 9, 3:10 PM CST | Winter Weather Advisory | PAH | 41 hr |
| Feb 10, 11:18 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 12, 2:09 PM CST | Winter Storm Watch | PAH | 37 hr |
| Feb 13, 12:55 PM CST | Wind Chill Advisory | PAH | 23 hr |
| Feb 14, 3:00 AM CST | Winter Storm Warning | PAH | 43 hr |
| Feb 15, 10:44 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 26, 1:57 PM CST | Flood Watch | PAH | 58 hr |
| Feb 28, 10:20 AM CST | River Flood Warning | PAH | 5 days |
| Mar 11, 4:11 AM CST | Flood Watch | PAH | 55 hr |
| Mar 11, 11:12 AM CST | River Flood Warning | PAH | 21 days |
| Mar 11, 1:26 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Mar 11, 3:09 PM CST | Severe Thunderstorm Warning | PAH | 33 min |
| Mar 11, 4:22 PM CST | Areal Flood Advisory | PAH | 30 min |
| Mar 11, 4:52 PM CST | Flash Flood Warning | PAH | 3 hr |
| Mar 16, 1:22 AM CDT | Dense Fog Advisory | PAH | 9 hr |
| Mar 17, 2:21 AM CDT | Flash Flood Watch | PAH | 23 hr |
| Mar 17, 9:35 PM CDT | River Flood Warning | LSX | 8 days |
| Mar 18, 12:17 PM CDT | River Flood Warning | PAH | 9 days |
| Mar 25, 3:55 AM CDT | Wind Advisory | PAH | 20 hr |
| Mar 25, 2:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Mar 25, 3:48 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 27, 6:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Mar 27, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Mar 27, 8:19 PM CDT | Severe Thunderstorm Watch | SPC | 114 min |
| Mar 28, 7:49 PM CDT | River Flood Warning | PAH | 5 days |
| Mar 30, 2:26 PM CDT | Freeze Watch | PAH | 22 hr |
| Mar 30, 2:26 PM CDT | Freeze Warning | PAH | 43 hr |
| Mar 31, 12:20 PM CDT | Freeze Warning | PAH | 45 hr |
| Apr 2, 2:15 PM CDT | Frost Advisory | PAH | 19 hr |
| Apr 9, 3:22 PM CDT | Special Weather Statement | PAH | 38 min |
| Apr 9, 4:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 9, 5:24 PM CDT | Special Weather Statement | PAH | 36 min |
| Apr 9, 5:36 PM CDT | Areal Flood Advisory | PAH | 3 hr |
| Apr 9, 6:57 PM CDT | Special Weather Statement | PAH | 33 min |
| Apr 11, 1:04 PM CDT | River Flood Warning | PAH | 6 days |
| Apr 11, 9:13 PM CDT | River Flood Warning | LSX | 6 days |
| Apr 19, 4:08 AM CDT | Freeze Watch | PAH | 11 hr |
| Apr 19, 3:25 PM CDT | Freeze Warning | PAH | 42 hr |
| Apr 21, 4:00 AM CDT | Frost Advisory | PAH | 28 hr |
| Apr 25, 2:43 AM CDT | Dense Fog Advisory | PAH | 6 hr |
| Apr 27, 3:11 PM CDT | Flash Flood Watch | PAH | 45 hr |
| May 4, 1:06 AM CDT | Mesoscale Discussion | SPC | 114 min |
| May 6, 10:05 AM CDT | Mesoscale Discussion | SPC | 85 min |
| May 6, 12:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 6, 12:26 PM CDT | Special Weather Statement | PAH | 49 min |
| May 6, 12:38 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 8, 2:19 PM CDT | Lake Wind Advisory | PAH | 29 hr |
| May 20, 10:12 AM CDT | Lake Wind Advisory | PAH | 9 hr |
| May 26, 6:37 PM CDT | Severe Thunderstorm Warning | PAH | 23 min |
| May 27, 11:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| May 27, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 27, 2:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 27, 2:23 PM CDT | Special Weather Statement | PAH | 52 min |
| May 27, 3:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 27, 4:31 PM CDT | Severe Thunderstorm Warning | PAH | 44 min |
| May 27, 6:23 PM CDT | Areal Flood Advisory | PAH | 112 min |
| May 28, 2:27 AM CDT | Lake Wind Advisory | PAH | 18 hr |
| Jun 17, 3:10 PM CDT | Heat Advisory | PAH | 28 hr |
| Jun 20, 4:09 AM CDT | Lake Wind Advisory | PAH | 16 hr |
| Jun 25, 3:31 AM CDT | Lake Wind Advisory | PAH | 16 hr |
| Jun 25, 12:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 3:21 AM CDT | Lake Wind Advisory | PAH | 17 hr |
| Jun 26, 12:13 PM CDT | River Flood Warning | LSX | 9 days |
| Jun 27, 11:21 AM CDT | River Flood Warning | PAH | 9 days |
| Jun 30, 12:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 10, 1:01 AM CDT | Mesoscale Discussion | SPC | 59 min |
| Jul 10, 1:36 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 10, 2:21 AM CDT | Flash Flood Watch | PAH | 25 hr |
| Jul 10, 3:09 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 1:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 2:01 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 5:29 PM CDT | Special Weather Statement | PAH | 46 min |
| Jul 10, 5:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 12, 1:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 16, 2:28 PM CDT | Areal Flood Advisory | PAH | 3 hr |
| Jul 16, 3:25 PM CDT | Flash Flood Warning | PAH | 3 hr |
| Jul 16, 4:46 PM CDT | Areal Flood Advisory | PAH | 119 min |
| Jul 19, 8:40 PM CDT | River Flood Warning | PAH | 5 days |
| Jul 28, 1:38 PM CDT | Heat Advisory | PAH | 30 hr |
| Aug 8, 2:41 PM CDT | Heat Advisory | PAH | 23 hr |
| Aug 8, 3:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 8, 5:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 9, 1:53 PM CDT | Heat Advisory | PAH | 3 days |
| Aug 10, 2:20 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 7:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 12, 7:23 PM CDT | Severe Thunderstorm Warning | PAH | 52 min |
| Aug 12, 7:37 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 12, 8:11 PM CDT | Severe Thunderstorm Warning | PAH | 49 min |
| Aug 21, 4:23 PM CDT | Special Weather Statement | PAH | 37 min |
| Aug 22, 2:38 PM CDT | Heat Advisory | PAH | 6 days |
| Sep 11, 4:03 AM CDT | Lake Wind Advisory | PAH | 14 hr |
| Sep 22, 3:45 AM CDT | Lake Wind Advisory | PAH | 13 hr |
| Sep 27, 4:00 AM CDT | Lake Wind Advisory | PAH | 13 hr |
| Oct 8, 5:45 AM CDT | Dense Fog Advisory | PAH | 3 hr |
| Oct 24, 5:44 PM CDT | Tornado Watch | SPC | 7 hr |
| Oct 24, 8:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Oct 24, 9:42 PM CDT | Severe Thunderstorm Warning | PAH | 48 min |
| Oct 24, 10:24 PM CDT | Special Weather Statement | PAH | 51 min |
| Oct 24, 10:33 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 24, 11:34 PM CDT | Flash Flood Warning | PAH | 6 hr |
| Nov 2, 3:38 AM CDT | Freeze Watch | PAH | 24 hr |
| Nov 2, 11:21 AM CDT | Freeze Warning | PAH | 22 hr |
| Nov 3, 3:19 AM CDT | Freeze Warning | PAH | 30 hr |
| Dec 5, 8:06 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 5, 9:13 PM CST | Special Weather Statement | PAH | 62 min |
| Dec 5, 9:29 PM CST | Tornado Warning | PAH | 31 min |
| Dec 5, 9:59 PM CST | Severe Thunderstorm Warning | PAH | 46 min |
| Dec 5, 10:00 PM CST | Severe Thunderstorm Warning | PAH | 30 min |
| Dec 5, 10:12 PM CST | Tornado Warning | PAH | 18 min |
| Dec 5, 10:17 PM CST | Areal Flood Advisory | PAH | 3 hr |
| Dec 5, 11:28 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 10, 3:07 PM CST | Tornado Watch | SPC | 11 hr |
| Dec 10, 4:45 PM CST | Mesoscale Discussion | SPC | 90 min |
| Dec 10, 11:03 PM CST | Tornado Watch | SPC | 5 hr |
| Dec 10, 11:28 PM CST | Mesoscale Discussion | SPC | 92 min |
| Dec 10, 11:33 PM CST | Severe Thunderstorm Warning | PAH | 42 min |
| Dec 15, 3:30 AM CST | Wind Advisory | PAH | 24 hr |
| Dec 17, 3:08 PM CST | Flood Watch | PAH | 12 hr |
| Dec 25, 11:55 PM CST | Dense Fog Advisory | PAH | 10 hr |
| Dec 29, 7:31 AM CST | Dense Fog Advisory | PAH | 2 hr |
| Dec 29, 10:01 PM CST | Dense Fog Advisory | PAH | 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 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.