Alert archive / Illinois / Jefferson County
Weather alerts in Jefferson County, Illinois, 2021
106 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 106
- Warnings
- 18
- Watches
- 19
- Advisories
- 38
- Busiest month
- July20 alerts
- Busiest day
- July 16, 20219 alerts
Over time
By month
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 1, 1:08 AM CST | Mesoscale Discussion | SPC | 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 |
| Mar 11, 4:11 AM CST | Flood Watch | PAH | 55 hr |
| Mar 11, 12:57 PM CST | Special Weather Statement | PAH | 48 min |
| Mar 11, 3:17 PM CST | Areal Flood Advisory | 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 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 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, 4:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 9, 6:42 PM CDT | Special Weather Statement | PAH | 48 min |
| 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 3, 2:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 6, 10:05 AM CDT | Mesoscale Discussion | SPC | 85 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 6, 3:40 PM CDT | Special Weather Statement | PAH | 50 min |
| May 6, 3:52 PM CDT | Severe Thunderstorm Warning | PAH | 38 min |
| 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 27, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 27, 2:20 PM CDT | Mesoscale Discussion | SPC | 85 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, 5:43 PM CDT | Areal Flood Advisory | PAH | 2 hr |
| May 28, 2:27 AM CDT | Lake Wind Advisory | PAH | 18 hr |
| Jun 11, 6:16 AM CDT | Dense Fog Advisory | PAH | 3 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 26, 3:21 AM CDT | Lake Wind Advisory | PAH | 17 hr |
| Jun 30, 12:22 PM CDT | Mesoscale Discussion | SPC | 113 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, 1:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 2:01 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 4:36 PM CDT | Severe Thunderstorm Warning | PAH | 39 min |
| Jul 10, 5:09 PM CDT | Severe Thunderstorm Warning | PAH | 36 min |
| Jul 10, 5:14 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, 1:09 AM CDT | Flash Flood Warning | PAH | 6 hr |
| Jul 16, 6:23 AM CDT | Flash Flood Warning | PAH | 6 hr |
| Jul 16, 7:52 AM CDT | Areal Flood Advisory | PAH | 4 min |
| Jul 16, 8:11 AM CDT | Areal Flood Advisory | PAH | 110 min |
| Jul 16, 12:14 PM CDT | Special Weather Statement | PAH | 46 min |
| Jul 16, 12:43 PM CDT | Areal Flood Advisory | PAH | 2 hr |
| Jul 16, 1:21 PM CDT | Flash Flood Warning | PAH | 114 min |
| Jul 16, 3:16 PM CDT | Areal Flood Advisory | PAH | 3 hr |
| Jul 16, 3:25 PM CDT | Flash Flood Warning | PAH | 3 hr |
| Jul 25, 6:52 AM CDT | Areal Flood Advisory | PAH | 2 hr |
| Jul 28, 1:38 PM CDT | Heat Advisory | PAH | 30 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 10, 3:52 PM CDT | Special Weather Statement | PAH | 38 min |
| Aug 12, 7:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 12, 7:37 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 12, 8:07 PM CDT | Severe Thunderstorm Warning | PAH | 38 min |
| Aug 22, 2:38 PM CDT | Heat Advisory | PAH | 6 days |
| Aug 30, 11:39 AM CDT | Areal Flood Advisory | PAH | 3 hr |
| Aug 30, 6:33 PM CDT | Areal Flood Advisory | PAH | 117 min |
| 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, 5:11 PM CDT | Mesoscale Discussion | SPC | 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, 10:01 PM CDT | Tornado Warning | PAH | 6 min |
| Oct 24, 10:33 PM CDT | Mesoscale Discussion | SPC | 2 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 2, 2:00 AM CST | Dense Fog Advisory | PAH | 4 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, 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 11, 12:08 AM CST | Severe Thunderstorm Warning | PAH | 32 min |
| Dec 15, 3:30 AM CST | Wind Advisory | PAH | 24 hr |
| Dec 25, 11:55 PM CST | Dense Fog Advisory | PAH | 10 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.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 7 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 7 |
| Flooding | |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 9 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 3 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 5 |
| Freeze Watch | 3 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Lake Wind Advisory | 9 |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
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. Rebuilt daily.