Alert archive / Illinois / Jefferson County
Weather alerts in Jefferson County, Illinois, 2020
92 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 92
- Warnings
- 16
- Watches
- 19
- Advisories
- 33
- Busiest month
- March19 alerts
- Busiest day
- March 19, 20208 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 8, 2:59 PM CST | Flash Flood Watch | PAH | 3 days |
| Jan 10, 2:47 AM CST | Wind Advisory | PAH | 39 hr |
| Jan 11, 3:43 AM CST | Areal Flood Advisory | PAH | 6 hr |
| Jan 16, 2:52 PM CST | Winter Weather Advisory | PAH | 22 hr |
| Jan 29, 7:19 AM CST | Winter Weather Advisory | PAH | 4 hr |
| Feb 11, 10:28 AM CST | Flash Flood Watch | PAH | 34 hr |
| Mar 12, 2:39 AM CDT | Dense Fog Advisory | PAH | 7 hr |
| Mar 12, 10:05 AM CDT | Flash Flood Watch | PAH | 10 hr |
| Mar 12, 11:44 AM CDT | Tornado Watch | SPC | 6 hr |
| Mar 12, 1:00 PM CDT | Severe Thunderstorm Warning | PAH | 45 min |
| Mar 12, 1:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 12, 1:46 PM CDT | Areal Flood Advisory | PAH | 2 hr |
| Mar 12, 1:47 PM CDT | Severe Thunderstorm Warning | PAH | 43 min |
| Mar 19, 2:36 AM CDT | Flash Flood Watch | PAH | 25 hr |
| Mar 19, 10:18 AM CDT | Areal Flood Advisory | PAH | 3 hr |
| Mar 19, 3:27 PM CDT | Severe Thunderstorm Warning | PAH | 48 min |
| Mar 19, 3:32 PM CDT | Tornado Warning | PAH | 43 min |
| Mar 19, 3:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Mar 19, 3:53 PM CDT | Flash Flood Warning | PAH | 3 hr |
| Mar 19, 4:06 PM CDT | Severe Thunderstorm Warning | PAH | 39 min |
| Mar 19, 4:06 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 25, 3:32 AM CDT | Dense Fog Advisory | PAH | 5 hr |
| Mar 27, 8:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Mar 28, 1:17 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Mar 28, 3:53 PM CDT | Tornado Watch | SPC | 5 hr |
| Apr 6, 6:20 AM CDT | Dense Fog Advisory | PAH | 3 hr |
| Apr 8, 3:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 8, 4:24 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 8, 7:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Apr 10, 3:24 AM CDT | Frost Advisory | PAH | 28 hr |
| Apr 12, 3:21 AM CDT | Wind Advisory | PAH | 31 hr |
| Apr 13, 5:57 PM CDT | Freeze Watch | PAH | 9 hr |
| Apr 14, 2:27 AM CDT | Freeze Warning | PAH | 30 hr |
| Apr 15, 1:32 PM CDT | Freeze Warning | PAH | 17 hr |
| Apr 17, 2:27 AM CDT | Frost Advisory | PAH | 30 hr |
| Apr 24, 3:00 AM CDT | Dense Fog Advisory | PAH | 6 hr |
| Apr 28, 6:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 28, 7:35 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 28, 9:55 PM CDT | Special Weather Statement | PAH | 50 min |
| May 8, 3:59 AM CDT | Freeze Warning | PAH | 28 hr |
| May 8, 3:59 AM CDT | Lake Wind Advisory | PAH | 16 hr |
| May 9, 3:13 PM CDT | Lake Wind Advisory | PAH | 27 hr |
| May 14, 3:25 AM CDT | Lake Wind Advisory | PAH | 16 hr |
| May 15, 5:04 AM CDT | Special Weather Statement | PAH | 71 min |
| May 15, 5:08 AM CDT | Special Weather Statement | PAH | 67 min |
| May 16, 3:38 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 17, 7:11 AM CDT | Lake Wind Advisory | PAH | 11 hr |
| May 17, 1:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 2:42 PM CDT | Severe Thunderstorm Warning | PAH | 16 min |
| May 25, 4:29 PM CDT | Severe Thunderstorm Warning | PAH | 31 min |
| May 28, 12:24 PM CDT | Areal Flood Advisory | PAH | 3 hr |
| Jun 3, 1:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 2:00 AM CDT | Wind Advisory | PAH | 17 hr |
| Jun 9, 3:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 10, 4:08 AM CDT | Lake Wind Advisory | PAH | 15 hr |
| Jun 26, 2:27 AM CDT | Lake Wind Advisory | PAH | 19 hr |
| Jun 27, 9:20 AM CDT | Lake Wind Advisory | PAH | 11 hr |
| Jun 27, 8:40 PM CDT | Flash Flood Watch | PAH | 16 hr |
| Jun 30, 3:26 AM CDT | Flash Flood Watch | PAH | 40 hr |
| Jul 1, 1:54 PM CDT | Special Weather Statement | PAH | 36 min |
| Jul 2, 5:05 AM CDT | Dense Fog Advisory | PAH | 3 hr |
| Jul 15, 1:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 6:12 PM CDT | Tornado Watch | SPC | 5 hr |
| Jul 17, 3:10 AM CDT | Heat Advisory | PAH | 64 hr |
| Jul 22, 11:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 12:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 30, 1:52 AM CDT | Flash Flood Watch | PAH | 22 hr |
| Aug 9, 1:58 PM CDT | Heat Advisory | PAH | 29 hr |
| Aug 10, 2:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 5:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 10, 6:31 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 10, 6:58 PM CDT | Special Weather Statement | PAH | 47 min |
| Aug 10, 7:11 PM CDT | Severe Thunderstorm Warning | PAH | 49 min |
| Aug 10, 7:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 12, 11:33 AM CDT | Flash Flood Watch | PAH | 7 hr |
| Aug 13, 10:56 AM CDT | Flash Flood Watch | PAH | 9 hr |
| Aug 22, 3:25 AM CDT | Dense Fog Advisory | PAH | 6 hr |
| Sep 12, 5:58 PM CDT | Areal Flood Advisory | PAH | 3 hr |
| Sep 30, 9:47 AM CDT | Lake Wind Advisory | PAH | 7 hr |
| Oct 4, 2:00 AM CDT | Frost Advisory | PAH | 30 hr |
| Oct 15, 2:58 AM CDT | Frost Advisory | PAH | 30 hr |
| Oct 15, 2:13 PM CDT | Freeze Warning | PAH | 19 hr |
| Oct 16, 2:56 AM CDT | Frost Advisory | PAH | 29 hr |
| Oct 16, 3:25 PM CDT | Red Flag Warning | PAH | 28 hr |
| Oct 23, 1:07 PM CDT | Special Weather Statement | PAH | 38 min |
| Oct 28, 2:25 AM CDT | Flood Watch | PAH | 32 hr |
| Oct 30, 1:47 PM CDT | Freeze Watch | PAH | 37 hr |
| Nov 1, 2:14 AM CST | Freeze Warning | PAH | 30 hr |
| Nov 10, 5:01 PM CST | Mesoscale Discussion | SPC | 119 min |
| Nov 14, 3:16 AM CST | Wind Advisory | PAH | 39 hr |
| Nov 19, 3:07 AM CST | Red Flag Warning | PAH | 15 hr |
| Dec 23, 3:34 AM CST | Wind Advisory | PAH | 20 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 | 2 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 6 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 9 |
| Flood Watch | 1 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 5 |
| Freeze Watch | 2 |
| Frost Advisory | 5 |
| Wind and dust | |
| Lake Wind Advisory | 8 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.