Alert archive / Illinois / Flash Flood Warnings
Flash Flood Warnings in Illinois, 2023
85 flash flood warnings in 2023. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Flash Flood Warnings
- 85
- Busiest month
- July31 flash flood warnings
- Busiest day
- July 19, 202310 flash flood warnings
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 | Counties | Lasted |
|---|---|---|---|---|
| Feb 16, 9:11 AM CST | Flash Flood Warning | PAH | Massac, Pope | 2 hr |
| Mar 3, 4:06 AM CST | Flash Flood Warning | PAH | Jackson, Perry | 8 hr |
| Mar 3, 4:55 AM CST | Flash Flood Warning | PAH | Alexander, Pulaski, Union | 8 hr |
| Mar 3, 5:40 AM CST | Flash Flood Warning | PAH | Gallatin, White | 8 hr |
| Mar 3, 5:48 AM CST | Flash Flood Warning | PAH | Franklin, Hamilton, Hardin, Johnson, Massac, Pope and 2 more | 7 hr |
| Mar 3, 8:57 AM CST | Flash Flood Warning | PAH | Edwards, Wabash | 6 hr |
| Mar 31, 6:13 PM CDT | Flash Flood Warning | LOT | Cook, DuPage | 58 min |
| Mar 31, 7:09 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Lake | 4 hr |
| Apr 15, 10:18 PM CDT | Flash Flood Warning | PAH | Johnson, Union | 2 hr |
| Apr 20, 4:56 PM CDT | Flash Flood Warning | ILX | Fulton, Peoria, Tazewell, Woodford | 2 hr |
| May 7, 3:43 AM CDT | Flash Flood Warning | ILX | McLean, Tazewell | 4 hr |
| May 7, 4:13 AM CDT | Flash Flood Warning | ILX | Champaign, Piatt | 4 hr |
| May 7, 3:21 PM CDT | Flash Flood Warning | ILX | Sangamon | 3 hr |
| May 7, 4:54 PM CDT | Flash Flood Warning | ILX | Sangamon | 3 hr |
| May 7, 5:52 PM CDT | Flash Flood Warning | ILX | Fulton, Mason, Schuyler | 3 hr |
| May 7, 7:23 PM CDT | Flash Flood Warning | LOT | Grundy, Kankakee, Kendall, Will | 5 hr |
| May 7, 7:32 PM CDT | Flash Flood Warning | LOT | DeKalb, LaSalle, Lee | 5 hr |
| May 7, 8:19 PM CDT | Flash Flood Warning | ILX | Sangamon | 3 hr |
| May 7, 8:33 PM CDT | Flash Flood Warning | DVN | Bureau, Putnam | 110 min |
| May 7, 9:35 PM CDT | Flash Flood Warning | ILX | Cass, Fulton, Mason, Menard, Morgan, Sangamon and 1 more | 115 min |
| May 7, 9:40 PM CDT | Flash Flood Warning | ILX | Christian, Sangamon | 110 min |
| May 7, 10:13 PM CDT | Flash Flood Warning | LSX | Montgomery | 6 hr |
| May 8, 2:07 AM CDT | Flash Flood Warning | DVN | Henry, Rock Island | 3 hr |
| May 13, 4:34 PM CDT | Flash Flood Warning | DVN | Mercer | 4 hr |
| May 14, 4:23 PM CDT | Flash Flood Warning | ILX | Sangamon | 3 hr |
| May 14, 5:56 PM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 4 hr |
| May 14, 6:11 PM CDT | Flash Flood Warning | ILX | Cass, Menard, Morgan, Sangamon | 3 hr |
| May 14, 6:50 PM CDT | Flash Flood Warning | ILX | Morgan, Sangamon | 3 hr |
| May 14, 7:21 PM CDT | Flash Flood Warning | ILX | Christian, Sangamon | 2 hr |
| May 14, 8:16 PM CDT | Flash Flood Warning | LSX | Fayette, Montgomery | 2 hr |
| May 14, 8:23 PM CDT | Flash Flood Warning | LSX | Marion | 2 hr |
| Jun 18, 5:37 PM CDT | Flash Flood Warning | LSX | Madison, Monroe, Saint Clair | 3 hr |
| Jul 1, 2:56 AM CDT | Flash Flood Warning | LSX | Adams, Brown | 2 hr |
| Jul 1, 5:00 PM CDT | Flash Flood Warning | PAH | Edwards, Wabash | 4 hr |
| Jul 1, 6:13 PM CDT | Flash Flood Warning | ILX | Clark, Crawford | 3 hr |
| Jul 1, 8:08 PM CDT | Flash Flood Warning | LSX | Adams | 3 hr |
| Jul 2, 9:16 AM CDT | Flash Flood Warning | LOT | Cook, DuPage, Will | 4 hr |
| Jul 2, 10:15 AM CDT | Flash Flood Warning | LOT | Cook | 4 hr |
| Jul 2, 12:23 PM CDT | Flash Flood Warning | ILX | Marshall, Peoria, Tazewell, Woodford | 54 min |
| Jul 2, 2:38 PM CDT | Flash Flood Warning | LOT | Cook | 4 hr |
| Jul 5, 3:12 PM CDT | Flash Flood Warning | DVN | Henderson, Warren | 4 hr |
| Jul 5, 7:07 PM CDT | Flash Flood Warning | LOT | Cook | 3 hr |
| Jul 12, 1:20 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Will | 3 hr |
| Jul 14, 8:29 PM CDT | Flash Flood Warning | PAH | Hamilton | 6 hr |
| Jul 14, 9:29 PM CDT | Flash Flood Warning | LSX | Clinton, Saint Clair | 4 hr |
| Jul 14, 9:36 PM CDT | Flash Flood Warning | PAH | Hamilton | 9 hr |
| Jul 14, 9:48 PM CDT | Flash Flood Warning | PAH | Franklin | 6 hr |
| Jul 19, 3:06 AM CDT | Flash Flood Warning | PAH | Pulaski | 9 hr |
| Jul 19, 4:49 AM CDT | Flash Flood Warning | PAH | Johnson, Pope, Williamson | 6 hr |
| Jul 19, 6:21 AM CDT | Flash Flood Warning | PAH | Williamson | 4 hr |
| Jul 19, 7:01 AM CDT | Flash Flood Warning | PAH | Massac | 6 hr |
| Jul 19, 7:37 AM CDT | Flash Flood Warning | PAH | Johnson, Pope | 3 hr |
| Jul 19, 7:41 AM CDT | Flash Flood Warning | PAH | Alexander, Jackson, Union | 6 hr |
| Jul 19, 8:28 AM CDT | Flash Flood Warning | PAH | Alexander | 6 hr |
| Jul 19, 9:09 AM CDT | Flash Flood Warning | PAH | Pulaski | 4 hr |
| Jul 19, 10:42 AM CDT | Flash Flood Warning | PAH | Johnson | 3 hr |
| Jul 19, 12:30 PM CDT | Flash Flood Warning | PAH | Massac, Pulaski | 5 hr |
| Jul 20, 9:46 AM CDT | Flash Flood Warning | LSX | Randolph | 3 hr |
| Jul 20, 10:14 AM CDT | Flash Flood Warning | PAH | Massac, Pulaski | 2 hr |
| Jul 28, 8:24 PM CDT | Flash Flood Warning | LOT | DuPage, Kane | 4 hr |
| Jul 28, 9:09 PM CDT | Flash Flood Warning | DVN | Jo Daviess | 3 hr |
| Jul 28, 9:16 PM CDT | Flash Flood Warning | LOT | Boone, Winnebago | 3 hr |
| Jul 28, 11:01 PM CDT | Flash Flood Warning | LOT | Cook | 108 min |
| Aug 3, 12:24 AM CDT | Flash Flood Warning | LSX | Bond, Fayette, Marion | 6 hr |
| Aug 3, 12:38 AM CDT | Flash Flood Warning | ILX | Clay, Richland | 6 hr |
| Aug 3, 1:02 AM CDT | Flash Flood Warning | PAH | Wayne | 7 hr |
| Aug 3, 1:49 AM CDT | Flash Flood Warning | PAH | Edwards | 6 hr |
| Aug 3, 2:21 AM CDT | Flash Flood Warning | PAH | Wabash | 4 hr |
| Aug 3, 3:41 AM CDT | Flash Flood Warning | PAH | White | 2 hr |
| Aug 5, 1:08 AM CDT | Flash Flood Warning | DVN | Hancock | 5 hr |
| Aug 5, 2:17 AM CDT | Flash Flood Warning | DVN | Hancock, Henderson, McDonough, Warren | 6 hr |
| Aug 5, 1:26 PM CDT | Flash Flood Warning | LOT | Ford, Iroquois | 3 hr |
| Aug 6, 8:52 PM CDT | Flash Flood Warning | ILX | Clay, Effingham, Jasper | 3 hr |
| Aug 9, 1:23 PM CDT | Flash Flood Warning | ILX | Christian, Sangamon | 4 hr |
| Aug 26, 3:43 PM CDT | Flash Flood Warning | LSX | Adams | 4 hr |
| Sep 6, 6:17 AM CDT | Flash Flood Warning | LOT | Cook, Will | 3 hr |
| Sep 6, 6:42 AM CDT | Flash Flood Warning | LOT | Kankakee | 3 hr |
| Sep 16, 8:46 PM CDT | Flash Flood Warning | LOT | Winnebago | 62 min |
| Sep 17, 7:26 AM CDT | Flash Flood Warning | LOT | Cook, DuPage | 5 hr |
| Sep 17, 10:07 AM CDT | Flash Flood Warning | LOT | Cook | 7 hr |
| Sep 17, 10:50 AM CDT | Flash Flood Warning | LOT | Cook | 3 hr |
| Sep 21, 9:37 PM CDT | Flash Flood Warning | ILX | Logan | 3 hr |
| Sep 26, 7:37 PM CDT | Flash Flood Warning | DVN | Jo Daviess | 6 hr |
| Sep 26, 10:15 PM CDT | Flash Flood Warning | DVN | Carroll, Jo Daviess | 3 hr |
| Sep 27, 4:05 AM CDT | Flash Flood Warning | DVN | Bureau | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County12
- Sangamon County10
- DuPage County6
- Massac County5
- Pulaski County5
- Johnson County5
- Pope County4
- Will County4
- Alexander County3
- Union County3
- Hamilton County3
- Williamson County3
- Edwards County3
- Wabash County3
- Fulton County3
- Tazewell County3
- Morgan County3
- Christian County3
- Saint Clair County3
- Adams County3
- Jo Daviess County3
- Jackson County2
- White County2
- Franklin County2
- Peoria County2
- Woodford County2
- Mason County2
- Schuyler County2
- Kankakee County2
- Bureau County2
- Cass County2
- Menard County2
- Montgomery County2
- Monroe County2
- Fayette County2
- Marion County2
- Henderson County2
- Warren County2
- Winnebago County2
- Clay County2
37 more counties
- Hancock County2
- Perry County1
- Gallatin County1
- Hardin County1
- Saline County1
- Lake County1
- McLean County1
- Champaign County1
- Piatt County1
- Grundy County1
- Kendall County1
- DeKalb County1
- LaSalle County1
- Lee County1
- Putnam County1
- Henry County1
- Rock Island County1
- Mercer County1
- Madison County1
- Brown County1
- Clark County1
- Crawford County1
- Marshall County1
- Clinton County1
- Randolph County1
- Kane County1
- Boone County1
- Bond County1
- Richland County1
- Wayne County1
- McDonough County1
- Ford County1
- Iroquois County1
- Effingham County1
- Jasper County1
- Logan County1
- Carroll County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20222024
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.