Alert archive / Illinois / Flash Flood Warnings
Flash Flood Warnings in Illinois, 2024
110 flash flood warnings in 2024. 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 2024. Tap one for its archive.
- Flash Flood Warnings
- 110
- Busiest month
- July52 flash flood warnings
- Busiest day
- July 16, 202424 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 |
|---|---|---|---|---|
| Jan 25, 9:29 AM CST | Flash Flood Warning | LOT | Grundy, Will | 39 hr |
| Jan 26, 8:15 PM CST | Flash Flood Warning | LOT | Grundy, Will | 4 hr |
| Mar 5, 5:36 AM CST | Flash Flood Warning | ILX | Morgan, Sangamon | 5 hr |
| Mar 14, 6:03 PM CDT | Flash Flood Warning | LSX | Bond, Madison | 3 hr |
| Mar 14, 6:50 PM CDT | Flash Flood Warning | ILX | Coles, Moultrie, Shelby | 3 hr |
| Mar 14, 7:22 PM CDT | Flash Flood Warning | ILX | Clark, Edgar | 3 hr |
| Mar 14, 7:44 PM CDT | Flash Flood Warning | LSX | Washington | 3 hr |
| Apr 1, 6:48 PM CDT | Flash Flood Warning | ILX | Christian | 3 hr |
| Apr 1, 7:15 PM CDT | Flash Flood Warning | ILX | Macon, Moultrie, Shelby | 4 hr |
| Apr 1, 8:34 PM CDT | Flash Flood Warning | ILX | Clark, Edgar | 2 hr |
| Apr 2, 1:27 AM CDT | Flash Flood Warning | LSX | Bond, Fayette, Montgomery | 6 hr |
| Apr 2, 2:43 AM CDT | Flash Flood Warning | LSX | Madison, Monroe, Saint Clair | 4 hr |
| Apr 27, 10:25 PM CDT | Flash Flood Warning | ILX | DeWitt | 110 min |
| Apr 27, 11:58 PM CDT | Flash Flood Warning | ILX | Marshall, Tazewell, Woodford | 6 hr |
| Apr 28, 1:39 AM CDT | Flash Flood Warning | ILX | Fulton, Knox, Marshall, Peoria, Tazewell, Woodford | 4 hr |
| May 2, 6:37 PM CDT | Flash Flood Warning | DVN | McDonough | 4 hr |
| May 4, 8:37 PM CDT | Flash Flood Warning | PAH | Franklin, Jefferson, Perry | 2 hr |
| May 8, 3:09 PM CDT | Flash Flood Warning | PAH | Jackson, Perry | 3 hr |
| May 8, 3:57 PM CDT | Flash Flood Warning | PAH | Franklin, Williamson | 4 hr |
| May 8, 4:53 PM CDT | Flash Flood Warning | PAH | Gallatin, Saline | 4 hr |
| May 8, 5:11 PM CDT | Flash Flood Warning | PAH | Hardin | 4 hr |
| May 13, 5:48 PM CDT | Flash Flood Warning | LOT | Lake | 112 min |
| May 19, 8:46 PM CDT | Flash Flood Warning | ILX | Macon | 3 hr |
| May 24, 1:19 PM CDT | Flash Flood Warning | ILX | Champaign | 3 hr |
| May 24, 1:47 PM CDT | Flash Flood Warning | LSX | Macoupin, Montgomery | 8 hr |
| May 24, 2:48 PM CDT | Flash Flood Warning | ILX | Champaign, Christian, Douglas, Macon, Moultrie, Piatt and 2 more | 3 hr |
| May 24, 3:13 PM CDT | Flash Flood Warning | LSX | Greene, Jersey, Macoupin | 6 hr |
| May 24, 4:13 PM CDT | Flash Flood Warning | ILX | Morgan, Scott | 4 hr |
| May 24, 4:30 PM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Pike | 6 hr |
| May 24, 5:34 PM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Jersey, Macoupin | 6 hr |
| May 24, 5:48 PM CDT | Flash Flood Warning | LSX | Calhoun | 3 hr |
| May 26, 7:37 AM CDT | Flash Flood Warning | PAH | Alexander | 10 hr |
| May 26, 8:09 AM CDT | Flash Flood Warning | PAH | Alexander, Pulaski, Union | 9 hr |
| May 26, 8:16 AM CDT | Flash Flood Warning | PAH | Union, Williamson | 3 hr |
| May 26, 7:32 PM CDT | Flash Flood Warning | PAH | Saline, Williamson | 6 hr |
| May 26, 7:46 PM CDT | Flash Flood Warning | PAH | Gallatin | 5 hr |
| Jun 1, 1:48 PM CDT | Flash Flood Warning | PAH | Alexander | 5 hr |
| Jun 3, 3:18 PM CDT | Flash Flood Warning | DVN | Jo Daviess | 4 hr |
| Jun 22, 9:13 PM CDT | Flash Flood Warning | LOT | Boone, Lake, McHenry, Winnebago | 4 hr |
| Jun 22, 9:50 PM CDT | Flash Flood Warning | DVN | Carroll, Whiteside | 91 min |
| Jun 22, 11:20 PM CDT | Flash Flood Warning | LOT | Cook, DeKalb, DuPage, Kane, Lee, Ogle | 4 hr |
| Jun 24, 11:43 PM CDT | Flash Flood Warning | LOT | DeKalb, Kane, Kendall, Will | 4 hr |
| Jun 25, 5:08 PM CDT | Flash Flood Warning | DVN | Carroll | 2 hr |
| Jun 25, 5:52 PM CDT | Flash Flood Warning | DVN | Carroll | 3 hr |
| Jun 25, 8:03 PM CDT | Flash Flood Warning | DVN | Bureau | 3 hr |
| Jun 25, 8:04 PM CDT | Flash Flood Warning | ILX | Marshall, Stark | 3 hr |
| Jun 25, 8:30 PM CDT | Flash Flood Warning | DVN | Putnam | 3 hr |
| Jul 2, 7:11 PM CDT | Flash Flood Warning | DVN | Jo Daviess | 3 hr |
| Jul 4, 5:48 AM CDT | Flash Flood Warning | LSX | Clinton, Madison, Monroe, Saint Clair, Washington | 3 hr |
| Jul 9, 3:37 PM CDT | Flash Flood Warning | LOT | Cook | 3 hr |
| Jul 12, 4:57 PM CDT | Flash Flood Warning | PAH | Perry | 3 hr |
| Jul 12, 5:47 PM CDT | Flash Flood Warning | LSX | Washington | 3 hr |
| Jul 13, 4:33 AM CDT | Flash Flood Warning | PAH | Jackson | 2 hr |
| Jul 13, 4:48 AM CDT | Flash Flood Warning | PAH | Union, Williamson | 2 hr |
| Jul 13, 5:08 AM CDT | Flash Flood Warning | PAH | Jackson, Perry | 3 hr |
| Jul 13, 10:59 PM CDT | Flash Flood Warning | LOT | Winnebago | 5 hr |
| Jul 13, 11:16 PM CDT | Flash Flood Warning | LOT | Boone, DeKalb, McHenry | 5 hr |
| Jul 14, 12:01 AM CDT | Flash Flood Warning | LOT | Ogle, Winnebago | 4 hr |
| Jul 14, 8:02 PM CDT | Flash Flood Warning | LOT | Winnebago | 4 hr |
| Jul 14, 8:21 PM CDT | Flash Flood Warning | DVN | Carroll, Jo Daviess, Stephenson | 4 hr |
| Jul 14, 8:30 PM CDT | Flash Flood Warning | LOT | Boone | 3 hr |
| Jul 14, 9:31 PM CDT | Flash Flood Warning | LOT | Lee, Ogle | 2 hr |
| Jul 14, 9:34 PM CDT | Flash Flood Warning | LOT | DeKalb | 2 hr |
| Jul 14, 9:48 PM CDT | Flash Flood Warning | LOT | Kane | 109 min |
| Jul 14, 10:30 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Will | 3 hr |
| Jul 15, 8:11 PM CDT | Flash Flood Warning | LOT | Winnebago | 3 hr |
| Jul 15, 8:35 PM CDT | Flash Flood Warning | LOT | Lake | 4 hr |
| Jul 15, 9:29 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Will | 3 hr |
| Jul 15, 10:33 PM CDT | Flash Flood Warning | ILX | Fulton, Knox, Mason, Peoria, Tazewell | 3 hr |
| Jul 15, 11:01 PM CDT | Flash Flood Warning | DVN | Henderson, McDonough, Warren | 6 hr |
| Jul 15, 11:08 PM CDT | Flash Flood Warning | ILX | Logan, Mason, Peoria, Tazewell | 5 hr |
| Jul 16, 1:05 AM CDT | Flash Flood Warning | ILX | Cass, Christian, DeWitt, Logan, Macon, Mason and 5 more | 3 hr |
| Jul 16, 1:27 AM CDT | Flash Flood Warning | ILX | Fulton, Mason | 8 hr |
| Jul 16, 2:52 AM CDT | Flash Flood Warning | ILX | Cass, Christian, Effingham, Menard, Morgan, Moultrie and 2 more | 4 hr |
| Jul 16, 4:47 AM CDT | Flash Flood Warning | LSX | Pike | 3 hr |
| Jul 16, 4:51 AM CDT | Flash Flood Warning | LSX | Montgomery | 3 hr |
| Jul 16, 4:58 AM CDT | Flash Flood Warning | LSX | Fayette | 3 hr |
| Jul 16, 5:30 AM CDT | Flash Flood Warning | LSX | Marion | 3 hr |
| Jul 16, 5:57 AM CDT | Flash Flood Warning | PAH | Jefferson | 13 hr |
| Jul 16, 6:37 AM CDT | Flash Flood Warning | LSX | Clinton, Washington | 10 hr |
| Jul 16, 6:44 AM CDT | Flash Flood Warning | LSX | Marion | 9 hr |
| Jul 16, 7:21 AM CDT | Flash Flood Warning | PAH | Jefferson, Perry | 12 hr |
| Jul 16, 7:54 AM CDT | Flash Flood Warning | LSX | Bond, Clinton, Fayette, Madison, Monroe, Saint Clair | 4 hr |
| Jul 16, 9:33 AM CDT | Flash Flood Warning | LSX | Monroe, Randolph, Saint Clair | 3 hr |
| Jul 16, 10:43 AM CDT | Flash Flood Warning | LSX | Calhoun | 3 hr |
| Jul 16, 11:35 AM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Jersey, Madison | 3 hr |
| Jul 16, 12:01 PM CDT | Flash Flood Warning | LSX | Madison, Monroe, Saint Clair | 3 hr |
| Jul 16, 12:31 PM CDT | Flash Flood Warning | LSX | Randolph | 3 hr |
| Jul 16, 2:34 PM CDT | Flash Flood Warning | PAH | Franklin, Perry | 4 hr |
| Jul 16, 11:39 PM CDT | Flash Flood Warning | PAH | Jackson, Union, Williamson | 6 hr |
| Jul 23, 5:38 PM CDT | Flash Flood Warning | LOT | Boone, McHenry | 3 hr |
| Jul 25, 7:49 AM CDT | Flash Flood Warning | DVN | Hancock | 3 hr |
| Jul 28, 5:45 PM CDT | Flash Flood Warning | PAH | Wayne | 3 hr |
| Jul 28, 6:59 PM CDT | Flash Flood Warning | LSX | Marion | 3 hr |
| Jul 28, 8:54 PM CDT | Flash Flood Warning | PAH | Franklin, Gallatin, Saline, Williamson | 7 hr |
| Jul 29, 9:17 PM CDT | Flash Flood Warning | LSX | Fayette | 3 hr |
| Jul 29, 10:57 PM CDT | Flash Flood Warning | LSX | Bond, Clinton, Madison | 4 hr |
| Jul 30, 5:32 PM CDT | Flash Flood Warning | PAH | Franklin, Perry | 92 min |
| Jul 30, 9:27 PM CDT | Flash Flood Warning | PAH | Pulaski | 116 min |
| Aug 1, 2:16 PM CDT | Flash Flood Warning | PAH | Gallatin, White | 3 hr |
| Aug 16, 2:09 AM CDT | Flash Flood Warning | ILX | McLean | 3 hr |
| Aug 30, 4:33 PM CDT | Flash Flood Warning | ILX | Sangamon | 4 hr |
| Aug 30, 5:06 PM CDT | Flash Flood Warning | LSX | Macoupin, Montgomery | 94 min |
| Aug 30, 5:41 PM CDT | Flash Flood Warning | ILX | Macon | 2 hr |
| Aug 30, 6:12 PM CDT | Flash Flood Warning | ILX | Piatt | 3 hr |
| Aug 30, 6:38 PM CDT | Flash Flood Warning | ILX | Champaign | 3 hr |
| Aug 30, 7:18 PM CDT | Flash Flood Warning | ILX | Vermilion | 3 hr |
| Aug 30, 7:36 PM CDT | Flash Flood Warning | ILX | Morgan | 2 hr |
| Sep 24, 12:45 PM CDT | Flash Flood Warning | LOT | Cook, Will | 3 hr |
| Nov 5, 2:39 AM CST | Flash Flood Warning | LSX | Madison, Monroe, Saint Clair | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Madison County8
- Perry County7
- Will County6
- Monroe County6
- Saint Clair County6
- Williamson County6
- Sangamon County5
- Moultrie County5
- Macon County5
- Franklin County5
- Calhoun County5
- Winnebago County5
- Cook County5
- Morgan County4
- Bond County4
- Shelby County4
- Washington County4
- Christian County4
- Fayette County4
- Montgomery County4
- Tazewell County4
- Jackson County4
- Gallatin County4
- Macoupin County4
- Greene County4
- Union County4
- Boone County4
- Carroll County4
- DeKalb County4
- Clinton County4
- Mason County4
- Marshall County3
- Fulton County3
- Peoria County3
- Jefferson County3
- Saline County3
- Lake County3
- Champaign County3
- Piatt County3
- Jersey County3
39 more counties
- Alexander County3
- Jo Daviess County3
- McHenry County3
- DuPage County3
- Kane County3
- Ogle County3
- Marion County3
- Grundy County2
- Clark County2
- Edgar County2
- DeWitt County2
- Woodford County2
- Knox County2
- McDonough County2
- Vermilion County2
- Pike County2
- Pulaski County2
- Lee County2
- Logan County2
- Cass County2
- Menard County2
- Randolph County2
- Coles County1
- Hardin County1
- Douglas County1
- Scott County1
- Whiteside County1
- Kendall County1
- Bureau County1
- Stark County1
- Putnam County1
- Stephenson County1
- Henderson County1
- Warren County1
- Effingham County1
- Hancock County1
- Wayne County1
- White County1
- McLean County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20232025
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.