Alert archive / Illinois / Flash Flood Warnings / 2026
Flash Flood Warnings in Illinois, June 2026
75 flash flood warnings in June 2026. 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 June 2026. Tap one for its archive.
- Flash Flood Warnings
- 75
- Busiest day
- June 11, 202615 flash flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Jun 1, 4:37 AM CDT | Flash Flood Warning | LSX | Calhoun, Greene, Jersey | 5 hr |
| Jun 1, 8:04 AM CDT | Flash Flood Warning | PAH | Pope | 4 hr |
| Jun 6, 9:20 PM CDT | Flash Flood Warning | ILX | Vermilion | 4 hr |
| Jun 7, 11:13 AM CDT | Flash Flood Warning | DVN | Bureau | 5 hr |
| Jun 7, 1:09 PM CDT | Flash Flood Warning | DVN | Henry | 6 hr |
| Jun 7, 1:47 PM CDT | Flash Flood Warning | DVN | Rock Island | 2 hr |
| Jun 8, 10:22 AM CDT | Flash Flood Warning | ILX | Morgan, Sangamon | 3 hr |
| Jun 8, 10:32 AM CDT | Flash Flood Warning | LSX | Calhoun, Jersey, Madison | 3 hr |
| Jun 8, 10:54 AM CDT | Flash Flood Warning | LSX | Madison | 2 hr |
| Jun 8, 11:55 AM CDT | Flash Flood Warning | ILX | Moultrie, Shelby | 5 hr |
| Jun 8, 1:25 PM CDT | Flash Flood Warning | ILX | Coles, Cumberland, Moultrie, Shelby | 3 hr |
| Jun 8, 1:58 PM CDT | Flash Flood Warning | ILX | Coles, Effingham, Jasper | 6 min |
| Jun 8, 2:04 PM CDT | Flash Flood Warning | ILX | Coles, Cumberland, Effingham, Jasper | 3 hr |
| Jun 8, 5:29 PM CDT | Flash Flood Warning | PAH | Alexander, Union | 3 hr |
| Jun 8, 6:17 PM CDT | Flash Flood Warning | LSX | Clinton, Marion | 3 hr |
| Jun 8, 6:32 PM CDT | Flash Flood Warning | ILX | Menard, Sangamon | 2 hr |
| Jun 9, 1:50 PM CDT | Flash Flood Warning | ILX | Fulton | 77 min |
| Jun 10, 8:07 PM CDT | Flash Flood Warning | ILX | Knox, Peoria, Stark | 3 hr |
| Jun 10, 8:19 PM CDT | Flash Flood Warning | DVN | Hancock | 5 hr |
| Jun 10, 9:14 PM CDT | Flash Flood Warning | ILX | Fulton, Knox, Marshall, Peoria, Stark, Woodford | 5 hr |
| Jun 10, 10:00 PM CDT | Flash Flood Warning | ILX | Fulton, Mason, Peoria, Tazewell | 4 hr |
| Jun 10, 11:05 PM CDT | Flash Flood Warning | LSX | Adams | 3 hr |
| Jun 10, 11:46 PM CDT | Flash Flood Warning | ILX | McLean, Tazewell, Woodford | 4 hr |
| Jun 11, 2:11 AM CDT | Flash Flood Warning | ILX | Sangamon | 3 hr |
| Jun 11, 2:32 AM CDT | Flash Flood Warning | ILX | Macon | 56 min |
| Jun 11, 4:57 PM CDT | Flash Flood Warning | DVN | Jo Daviess, Stephenson | 3 hr |
| Jun 11, 5:02 PM CDT | Flash Flood Warning | DVN | Hancock, McDonough | 4 hr |
| Jun 11, 5:30 PM CDT | Flash Flood Warning | LOT | Winnebago | 4 hr |
| Jun 11, 5:40 PM CDT | Flash Flood Warning | ILX | Fulton, Peoria | 5 hr |
| Jun 11, 5:52 PM CDT | Flash Flood Warning | LOT | Boone | 3 hr |
| Jun 11, 6:27 PM CDT | Flash Flood Warning | LOT | McHenry | 3 hr |
| Jun 11, 6:28 PM CDT | Flash Flood Warning | LOT | Lake | 3 hr |
| Jun 11, 7:01 PM CDT | Flash Flood Warning | ILX | Cass, Logan, Mason, Menard, Morgan, Sangamon and 2 more | 4 hr |
| Jun 11, 7:24 PM CDT | Flash Flood Warning | ILX | DeWitt, Logan, Macon, Piatt | 4 hr |
| Jun 11, 7:55 PM CDT | Flash Flood Warning | ILX | Christian, Macon, Morgan, Piatt, Sangamon | 3 hr |
| Jun 17, 7:55 AM CDT | Flash Flood Warning | DVN | Mercer, Rock Island | 5 hr |
| Jun 17, 8:25 AM CDT | Flash Flood Warning | DVN | Henry, Rock Island | 5 hr |
| Jun 17, 8:45 AM CDT | Flash Flood Warning | DVN | Henry, Mercer, Rock Island, Warren | 4 hr |
| Jun 17, 9:08 AM CDT | Flash Flood Warning | DVN | McDonough, Warren | 6 hr |
| Jun 17, 3:41 PM CDT | Flash Flood Warning | ILX | DeWitt, Logan, McLean, Tazewell | 3 hr |
| Jun 17, 3:50 PM CDT | Flash Flood Warning | ILX | McLean, Peoria, Tazewell, Woodford | 3 hr |
| Jun 17, 3:55 PM CDT | Flash Flood Warning | LOT | Cook | 3 hr |
| Jun 17, 4:19 PM CDT | Flash Flood Warning | ILX | Champaign, DeWitt, McLean, Piatt | 3 hr |
| Jun 17, 6:11 PM CDT | Flash Flood Warning | ILX | Christian, Logan, Macon, Menard, Moultrie, Sangamon | 4 hr |
| Jun 17, 6:16 PM CDT | Flash Flood Warning | ILX | Champaign, Piatt, Vermilion | 4 hr |
| Jun 17, 6:40 PM CDT | Flash Flood Warning | ILX | Clark, Coles, Douglas, Edgar | 3 hr |
| Jun 21, 3:09 PM CDT | Flash Flood Warning | ILX | Effingham, Shelby | 4 hr |
| Jun 21, 3:26 PM CDT | Flash Flood Warning | LSX | Bond, Fayette, Montgomery | 4 hr |
| Jun 21, 3:44 PM CDT | Flash Flood Warning | LSX | Fayette | 6 hr |
| Jun 21, 3:56 PM CDT | Flash Flood Warning | ILX | Clay, Effingham | 4 hr |
| Jun 21, 4:06 PM CDT | Flash Flood Warning | ILX | Cumberland, Effingham | 3 hr |
| Jun 21, 4:27 PM CDT | Flash Flood Warning | LSX | Marion | 6 hr |
| Jun 21, 4:37 PM CDT | Flash Flood Warning | ILX | Clark, Clay, Cumberland, Jasper, Richland | 3 hr |
| Jun 21, 4:55 PM CDT | Flash Flood Warning | ILX | Clark, Crawford | 3 hr |
| Jun 21, 6:11 PM CDT | Flash Flood Warning | ILX | Clay, Lawrence, Richland | 104 min |
| Jun 21, 7:58 PM CDT | Flash Flood Warning | PAH | Edwards, Wabash, Wayne | 6 hr |
| Jun 21, 9:18 PM CDT | Flash Flood Warning | PAH | Wabash | 6 hr |
| Jun 24, 8:37 PM CDT | Flash Flood Warning | LOT | Cook | 2 hr |
| Jun 25, 5:24 PM CDT | Flash Flood Warning | ILX | Clay, Effingham, Jasper | 5 hr |
| Jun 25, 9:03 PM CDT | Flash Flood Warning | LSX | Randolph | 4 hr |
| Jun 25, 9:53 PM CDT | Flash Flood Warning | PAH | Jackson, Perry | 5 hr |
| Jun 26, 4:52 AM CDT | Flash Flood Warning | PAH | Johnson, Union | 3 hr |
| Jun 26, 3:43 PM CDT | Flash Flood Warning | PAH | Alexander | 4 hr |
| Jun 26, 4:10 PM CDT | Flash Flood Warning | PAH | Pulaski | 3 hr |
| Jun 26, 11:57 PM CDT | Flash Flood Warning | PAH | Wabash | 8 hr |
| Jun 27, 7:59 AM CDT | Flash Flood Warning | PAH | Edwards, Wabash, White | 5 hr |
| Jun 27, 12:14 PM CDT | Flash Flood Warning | PAH | Alexander, Union | 2 hr |
| Jun 27, 12:59 PM CDT | Flash Flood Warning | LSX | Marion | 4 hr |
| Jun 27, 1:18 PM CDT | Flash Flood Warning | ILX | Clay, Crawford, Effingham, Jasper, Lawrence, Richland | 6 hr |
| Jun 27, 1:27 PM CDT | Flash Flood Warning | PAH | Edwards, Jefferson, Wabash, Wayne | 4 hr |
| Jun 27, 2:33 PM CDT | Flash Flood Warning | PAH | Edwards, Wabash | 6 hr |
| Jun 27, 3:16 PM CDT | Flash Flood Warning | PAH | White | 3 hr |
| Jun 27, 3:19 PM CDT | Flash Flood Warning | ILX | Clark, Crawford, Cumberland, Jasper | 4 hr |
| Jun 27, 3:52 PM CDT | Flash Flood Warning | ILX | Clark, Coles, Edgar | 4 hr |
| Jun 27, 6:16 PM CDT | Flash Flood Warning | PAH | Massac, Pope | 77 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Effingham County7
- Sangamon County6
- Jasper County6
- Wabash County6
- Coles County5
- Cumberland County5
- Peoria County5
- Tazewell County5
- Clark County5
- Clay County5
- Rock Island County4
- Fulton County4
- McLean County4
- Macon County4
- Logan County4
- Piatt County4
- Edwards County4
- Henry County3
- Morgan County3
- Moultrie County3
- Shelby County3
- Alexander County3
- Union County3
- Marion County3
- Menard County3
- Woodford County3
- DeWitt County3
- Richland County3
- Crawford County3
- Calhoun County2
- Jersey County2
- Pope County2
- Vermilion County2
- Madison County2
- Knox County2
- Stark County2
- Hancock County2
- Mason County2
- McDonough County2
- Christian County2
32 more counties
- Mercer County2
- Warren County2
- Cook County2
- Champaign County2
- Edgar County2
- Fayette County2
- Lawrence County2
- Wayne County2
- White County2
- Greene County1
- Bureau County1
- Clinton County1
- Marshall County1
- Adams County1
- Jo Daviess County1
- Stephenson County1
- Winnebago County1
- Boone County1
- McHenry County1
- Lake County1
- Cass County1
- Scott County1
- Douglas County1
- Bond County1
- Montgomery County1
- Randolph County1
- Jackson County1
- Perry County1
- Johnson County1
- Pulaski County1
- Jefferson County1
- Massac County1
Nearby
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.