Alert archive / Illinois / Flash Flood Warnings
Flash Flood Warnings in Illinois, 2025
134 flash flood warnings in 2025. 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 2025. Tap one for its archive.
- Flash Flood Warnings
- 134
- Busiest month
- July67 flash flood warnings
- Busiest day
- April 5, 202515 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 15, 1:40 PM CST | Flash Flood Warning | PAH | Massac, Pope | 6 hr |
| Feb 15, 3:34 PM CST | Flash Flood Warning | PAH | Alexander | 4 hr |
| Feb 15, 7:45 PM CST | Flash Flood Warning | PAH | Hardin, Massac, Pope | 4 hr |
| Apr 2, 4:58 PM CDT | Flash Flood Warning | ILX | Champaign, DeWitt, Logan, McLean, Macon, Piatt | 3 hr |
| Apr 2, 8:53 PM CDT | Flash Flood Warning | PAH | Edwards, Wabash, White | 6 hr |
| Apr 2, 9:09 PM CDT | Flash Flood Warning | PAH | Hardin, Pope | 6 hr |
| Apr 4, 6:51 PM CDT | Flash Flood Warning | LSX | Monroe, Randolph, Saint Clair, Washington | 7 hr |
| Apr 4, 7:08 PM CDT | Flash Flood Warning | LSX | Bond, Clinton, Fayette, Marion | 7 hr |
| Apr 4, 7:24 PM CDT | Flash Flood Warning | PAH | Jefferson, Perry, Wayne | 26 hr |
| Apr 4, 7:46 PM CDT | Flash Flood Warning | ILX | Clark, Clay, Crawford, Cumberland, Effingham, Jasper | 5 hr |
| Apr 4, 8:39 PM CDT | Flash Flood Warning | PAH | Jackson, Union | 24 hr |
| Apr 4, 9:07 PM CDT | Flash Flood Warning | PAH | Alexander | 24 hr |
| Apr 4, 9:30 PM CDT | Flash Flood Warning | PAH | Franklin, Johnson, Pulaski, Williamson | 24 hr |
| Apr 4, 9:31 PM CDT | Flash Flood Warning | ILX | Clark, Clay, Crawford, Jasper, Lawrence, Richland | 3 hr |
| Apr 4, 9:56 PM CDT | Flash Flood Warning | PAH | Edwards, Wabash | 6 hr |
| Apr 4, 10:28 PM CDT | Flash Flood Warning | PAH | Gallatin, Hamilton, Saline, White | 6 hr |
| Apr 4, 10:36 PM CDT | Flash Flood Warning | PAH | Hardin, Massac, Pope | 23 hr |
| Apr 4, 10:46 PM CDT | Flash Flood Warning | ILX | Lawrence | 3 hr |
| Apr 4, 10:46 PM CDT | Flash Flood Warning | PAH | Wabash, White | 6 hr |
| Apr 4, 10:54 PM CDT | Flash Flood Warning | PAH | Massac, Pope | 6 hr |
| Apr 5, 11:10 AM CDT | Flash Flood Warning | PAH | Hamilton | 10 hr |
| Apr 5, 3:32 PM CDT | Flash Flood Warning | PAH | Edwards, Gallatin, Saline, Wabash, White | 6 hr |
| Apr 29, 1:50 PM CDT | Flash Flood Warning | LSX | Washington | 3 hr |
| Apr 29, 1:57 PM CDT | Flash Flood Warning | LSX | Clinton, Marion | 3 hr |
| Apr 29, 3:11 PM CDT | Flash Flood Warning | ILX | Clay, Crawford, Jasper, Lawrence, Richland | 3 hr |
| May 20, 2:31 PM CDT | Flash Flood Warning | DVN | Rock Island | 3 hr |
| May 20, 3:37 PM CDT | Flash Flood Warning | PAH | Massac | 50 min |
| Jun 6, 3:43 PM CDT | Flash Flood Warning | PAH | Saline | 112 min |
| Jun 13, 8:39 PM CDT | Flash Flood Warning | PAH | White | 4 hr |
| Jun 13, 8:51 PM CDT | Flash Flood Warning | LSX | Madison | 86 min |
| Jun 18, 1:45 PM CDT | Flash Flood Warning | LOT | Iroquois, Kankakee | 2 hr |
| Jun 18, 6:50 PM CDT | Flash Flood Warning | LOT | Cook, DuPage | 100 min |
| Jun 27, 3:25 PM CDT | Flash Flood Warning | LSX | Madison | 3 hr |
| Jun 27, 3:54 PM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Pike | 3 hr |
| Jun 30, 9:15 PM CDT | Flash Flood Warning | LSX | Fayette | 3 hr |
| Jun 30, 9:54 PM CDT | Flash Flood Warning | ILX | Effingham, Jasper | 3 hr |
| Jun 30, 10:13 PM CDT | Flash Flood Warning | ILX | Effingham | 2 hr |
| Jun 30, 10:39 PM CDT | Flash Flood Warning | ILX | Crawford, Jasper | 3 hr |
| Jun 30, 11:14 PM CDT | Flash Flood Warning | ILX | Crawford, Lawrence | 3 hr |
| Jun 30, 11:52 PM CDT | Flash Flood Warning | ILX | Lawrence | 118 min |
| Jul 6, 4:17 PM CDT | Flash Flood Warning | LSX | Madison, Saint Clair | 3 hr |
| Jul 6, 5:21 PM CDT | Flash Flood Warning | LSX | Fayette | 3 hr |
| Jul 6, 9:43 PM CDT | Flash Flood Warning | LOT | Iroquois | 3 hr |
| Jul 8, 2:43 PM CDT | Flash Flood Warning | DVN | Rock Island, Whiteside | 104 min |
| Jul 8, 5:49 PM CDT | Flash Flood Warning | ILX | Christian | 48 min |
| Jul 8, 9:45 PM CDT | Flash Flood Warning | LOT | Cook | 3 hr |
| Jul 10, 5:05 PM CDT | Flash Flood Warning | LOT | Boone, Winnebago | 6 hr |
| Jul 10, 6:49 PM CDT | Flash Flood Warning | DVN | Jo Daviess | 3 hr |
| Jul 10, 7:42 PM CDT | Flash Flood Warning | DVN | Carroll, Jo Daviess, Stephenson, Whiteside | 4 hr |
| Jul 10, 7:58 PM CDT | Flash Flood Warning | LOT | Boone, Winnebago | 3 hr |
| Jul 10, 8:04 PM CDT | Flash Flood Warning | DVN | Jo Daviess, Stephenson | 3 hr |
| Jul 10, 8:18 PM CDT | Flash Flood Warning | LOT | Ogle | 3 hr |
| Jul 10, 10:10 PM CDT | Flash Flood Warning | DVN | Rock Island | 2 hr |
| Jul 10, 10:33 PM CDT | Flash Flood Warning | DVN | Rock Island | 108 min |
| Jul 10, 10:50 PM CDT | Flash Flood Warning | DVN | Bureau, Putnam | 92 min |
| Jul 11, 5:26 PM CDT | Flash Flood Warning | DVN | Rock Island | 10 hr |
| Jul 11, 6:30 PM CDT | Flash Flood Warning | DVN | Carroll, Rock Island, Whiteside | 5 hr |
| Jul 11, 6:33 PM CDT | Flash Flood Warning | DVN | Henderson, Mercer, Rock Island | 5 hr |
| Jul 11, 7:45 PM CDT | Flash Flood Warning | DVN | Bureau, Putnam | 4 hr |
| Jul 11, 8:25 PM CDT | Flash Flood Warning | DVN | Hancock, Henderson, McDonough, Warren | 3 hr |
| Jul 11, 8:54 PM CDT | Flash Flood Warning | DVN | Hancock, McDonough, Warren | 2 hr |
| Jul 13, 12:50 PM CDT | Flash Flood Warning | LSX | Adams | 3 hr |
| Jul 13, 11:39 PM CDT | Flash Flood Warning | PAH | Union | 5 hr |
| Jul 15, 4:39 PM CDT | Flash Flood Warning | ILX | Clay | 3 hr |
| Jul 15, 4:53 PM CDT | Flash Flood Warning | LSX | Madison | 44 min |
| Jul 17, 2:39 PM CDT | Flash Flood Warning | PAH | Perry | 81 min |
| Jul 17, 3:48 PM CDT | Flash Flood Warning | LSX | Clinton, Saint Clair | 3 hr |
| Jul 18, 6:25 PM CDT | Flash Flood Warning | PAH | Saline | 3 hr |
| Jul 19, 7:58 AM CDT | Flash Flood Warning | LSX | Clinton, Madison, Saint Clair | 3 hr |
| Jul 19, 9:44 AM CDT | Flash Flood Warning | DVN | McDonough | 4 hr |
| Jul 19, 10:51 AM CDT | Flash Flood Warning | PAH | Wabash | 8 hr |
| Jul 19, 10:57 AM CDT | Flash Flood Warning | ILX | Macon | 3 hr |
| Jul 19, 11:10 AM CDT | Flash Flood Warning | ILX | Clay | 8 hr |
| Jul 19, 11:44 AM CDT | Flash Flood Warning | PAH | Wayne | 9 hr |
| Jul 19, 11:58 AM CDT | Flash Flood Warning | LSX | Marion | 3 hr |
| Jul 19, 12:59 PM CDT | Flash Flood Warning | PAH | Edwards, Wabash, Wayne | 6 hr |
| Jul 19, 1:32 PM CDT | Flash Flood Warning | PAH | Hamilton, White | 6 hr |
| Jul 19, 3:27 PM CDT | Flash Flood Warning | PAH | Franklin, Williamson | 4 hr |
| Jul 20, 10:07 AM CDT | Flash Flood Warning | DVN | Bureau | 51 min |
| Jul 20, 7:57 PM CDT | Flash Flood Warning | LSX | Fayette | 7 hr |
| Jul 20, 10:04 PM CDT | Flash Flood Warning | ILX | Effingham, Shelby | 6 hr |
| Jul 20, 11:08 PM CDT | Flash Flood Warning | LSX | Fayette | 3 hr |
| Jul 20, 11:33 PM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Jersey, Pike | 4 hr |
| Jul 21, 12:12 AM CDT | Flash Flood Warning | LSX | Bond, Macoupin, Montgomery | 3 hr |
| Jul 21, 12:27 AM CDT | Flash Flood Warning | LSX | Calhoun, Jersey, Madison, Saint Clair | 3 hr |
| Jul 21, 12:42 AM CDT | Flash Flood Warning | LSX | Fayette, Marion | 3 hr |
| Jul 21, 5:32 AM CDT | Flash Flood Warning | LSX | Monroe | 86 min |
| Jul 25, 11:43 AM CDT | Flash Flood Warning | LOT | Cook, DuPage | 3 hr |
| Jul 25, 4:40 PM CDT | Flash Flood Warning | DVN | Rock Island | 4 hr |
| Jul 25, 6:47 PM CDT | Flash Flood Warning | ILX | Knox | 3 hr |
| Jul 25, 10:16 PM CDT | Flash Flood Warning | LOT | Ogle | 3 hr |
| Jul 26, 1:51 AM CDT | Flash Flood Warning | ILX | Menard | 2 hr |
| Jul 26, 2:15 AM CDT | Flash Flood Warning | ILX | Logan, Mason, Menard | 119 min |
| Jul 26, 3:33 AM CDT | Flash Flood Warning | DVN | Hancock, Henderson | 8 hr |
| Jul 26, 7:47 AM CDT | Flash Flood Warning | DVN | Henderson, McDonough, Warren | 6 hr |
| Jul 26, 6:31 PM CDT | Flash Flood Warning | ILX | Champaign, Piatt | 3 hr |
| Jul 26, 11:18 PM CDT | Flash Flood Warning | LSX | Calhoun | 7 hr |
| Jul 26, 11:52 PM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Jersey, Macoupin | 7 hr |
| Jul 27, 4:07 PM CDT | Flash Flood Warning | ILX | Crawford | 2 hr |
| Jul 30, 8:14 PM CDT | Flash Flood Warning | DVN | Bureau, Putnam | 3 hr |
| Jul 30, 8:43 PM CDT | Flash Flood Warning | DVN | Bureau | 3 hr |
| Aug 4, 2:54 PM CDT | Flash Flood Warning | PAH | Hamilton, Wayne | 2 hr |
| Aug 4, 3:20 PM CDT | Flash Flood Warning | PAH | Hamilton | 4 hr |
| Aug 4, 4:43 PM CDT | Flash Flood Warning | ILX | Crawford, Lawrence | 3 hr |
| Aug 6, 8:31 PM CDT | Flash Flood Warning | DVN | Mercer | 107 min |
| Aug 10, 4:18 AM CDT | Flash Flood Warning | DVN | Mercer, Rock Island | 5 hr |
| Aug 10, 7:01 AM CDT | Flash Flood Warning | DVN | Jo Daviess | 5 hr |
| Aug 12, 3:05 PM CDT | Flash Flood Warning | LOT | Cook, Will | 3 hr |
| Aug 12, 3:43 PM CDT | Flash Flood Warning | LSX | Madison, Saint Clair | 105 min |
| Aug 12, 5:04 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Will | 3 hr |
| Aug 12, 6:42 PM CDT | Flash Flood Warning | LOT | Livingston | 2 hr |
| Aug 16, 3:57 PM CDT | Flash Flood Warning | ILX | Vermilion | 2 hr |
| Aug 16, 5:11 PM CDT | Flash Flood Warning | LOT | DuPage | 2 hr |
| Aug 16, 7:03 PM CDT | Flash Flood Warning | ILX | Champaign, Vermilion | 117 min |
| Aug 17, 2:32 AM CDT | Flash Flood Warning | LOT | Cook, DuPage | 118 min |
| Aug 17, 3:36 AM CDT | Flash Flood Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 114 min |
| Aug 17, 4:13 AM CDT | Flash Flood Warning | LOT | Kane, Kendall, Will | 2 hr |
| Aug 17, 4:20 AM CDT | Flash Flood Warning | LOT | Grundy, Iroquois, Kankakee, Kendall, Will | 3 hr |
| Aug 17, 3:11 PM CDT | Flash Flood Warning | LSX | Adams | 106 min |
| Aug 17, 7:17 PM CDT | Flash Flood Warning | LOT | LaSalle | 3 hr |
| Aug 17, 7:20 PM CDT | Flash Flood Warning | DVN | Bureau, Putnam | 2 hr |
| Aug 18, 5:26 PM CDT | Flash Flood Warning | LOT | DeKalb, Lee | 3 hr |
| Aug 18, 5:47 PM CDT | Flash Flood Warning | LOT | DuPage | 3 hr |
| Aug 18, 6:01 PM CDT | Flash Flood Warning | LOT | DeKalb, Lee | 3 hr |
| Aug 18, 6:52 PM CDT | Flash Flood Warning | LOT | Boone, Winnebago | 3 hr |
| Aug 18, 7:02 PM CDT | Flash Flood Warning | LOT | Cook, Will | 70 min |
| Aug 18, 7:07 PM CDT | Flash Flood Warning | LOT | LaSalle | 92 min |
| Aug 18, 7:37 PM CDT | Flash Flood Warning | LOT | McHenry | 3 hr |
| Aug 18, 7:38 PM CDT | Flash Flood Warning | LOT | LaSalle | 3 hr |
| Aug 18, 7:45 PM CDT | Flash Flood Warning | LOT | DeKalb, Kendall, LaSalle, Will | 84 min |
| Aug 18, 8:12 PM CDT | Flash Flood Warning | LOT | Cook, Will | 2 hr |
| Aug 18, 8:26 PM CDT | Flash Flood Warning | LOT | Cook | 3 hr |
| Aug 19, 12:03 AM CDT | Flash Flood Warning | LOT | Cook, Will | 87 min |
| Sep 23, 5:44 PM CDT | Flash Flood Warning | LSX | Bond, Fayette | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County11
- Rock Island County9
- Will County9
- Fayette County7
- Crawford County7
- Madison County7
- DuPage County7
- Wabash County6
- White County6
- Saint Clair County6
- Lawrence County6
- Bureau County6
- Massac County5
- Pope County5
- Clay County5
- Jasper County5
- Hamilton County5
- Calhoun County5
- Edwards County4
- Clinton County4
- Marion County4
- Wayne County4
- Effingham County4
- Saline County4
- Jo Daviess County4
- Putnam County4
- Henderson County4
- McDonough County4
- Kendall County4
- LaSalle County4
- Hardin County3
- Champaign County3
- Bond County3
- Iroquois County3
- Greene County3
- Whiteside County3
- Boone County3
- Winnebago County3
- Mercer County3
- Hancock County3
43 more counties
- Warren County3
- Jersey County3
- DeKalb County3
- Alexander County2
- Logan County2
- Macon County2
- Piatt County2
- Monroe County2
- Washington County2
- Perry County2
- Clark County2
- Union County2
- Franklin County2
- Williamson County2
- Richland County2
- Gallatin County2
- Kankakee County2
- Pike County2
- Carroll County2
- Stephenson County2
- Ogle County2
- Adams County2
- Macoupin County2
- Menard County2
- Vermilion County2
- Kane County2
- Lee County2
- DeWitt County1
- McLean County1
- Randolph County1
- Jefferson County1
- Cumberland County1
- Jackson County1
- Johnson County1
- Pulaski County1
- Christian County1
- Shelby County1
- Montgomery County1
- Knox County1
- Mason County1
- Livingston County1
- Grundy County1
- McHenry County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.