Alert archive / Illinois / Flash Flood Warnings / 2021
Flash Flood Warnings in Illinois, August 2021
28 flash flood warnings in August 2021. 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 August 2021. Tap one for its archive.
- Flash Flood Warnings
- 28
- Busiest day
- August 26, 20216 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 |
|---|---|---|---|---|
| Aug 8, 5:35 PM CDT | Flash Flood Warning | ILX | McLean | 3 hr |
| Aug 9, 4:56 AM CDT | Flash Flood Warning | PAH | Wayne | 3 hr |
| Aug 9, 5:28 AM CDT | Flash Flood Warning | PAH | Edwards, Wabash | 3 hr |
| Aug 9, 8:19 AM CDT | Flash Flood Warning | PAH | Edwards, Wayne | 2 hr |
| Aug 9, 8:02 PM CDT | Flash Flood Warning | DVN | Bureau | 2 hr |
| Aug 11, 6:59 AM CDT | Flash Flood Warning | DVN | Hancock, Henderson | 3 hr |
| Aug 12, 9:59 AM CDT | Flash Flood Warning | LOT | Ford | 5 hr |
| Aug 12, 10:04 AM CDT | Flash Flood Warning | ILX | Champaign, McLean | 5 hr |
| Aug 12, 11:17 AM CDT | Flash Flood Warning | ILX | Champaign, DeWitt, Piatt | 3 hr |
| Aug 12, 2:16 PM CDT | Flash Flood Warning | ILX | Champaign, DeWitt, Piatt | 119 min |
| Aug 12, 4:15 PM CDT | Flash Flood Warning | ILX | Douglas, Moultrie, Shelby | 3 hr |
| Aug 12, 7:40 PM CDT | Flash Flood Warning | LSX | Bond, Madison | 4 hr |
| Aug 21, 6:54 AM CDT | Flash Flood Warning | PAH | Massac, Pope | 5 hr |
| Aug 24, 5:40 PM CDT | Flash Flood Warning | LOT | Boone, McHenry | 4 hr |
| Aug 24, 6:36 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Lake | 3 hr |
| Aug 25, 7:21 PM CDT | Flash Flood Warning | LOT | Cook, DuPage | 3 hr |
| Aug 25, 9:06 PM CDT | Flash Flood Warning | LOT | DuPage, Kane, Kendall, Will | 5 hr |
| Aug 25, 9:15 PM CDT | Flash Flood Warning | LOT | Cook, Kankakee, Will | 4 hr |
| Aug 26, 2:20 PM CDT | Flash Flood Warning | ILX | Coles, Cumberland, Moultrie, Shelby | 3 hr |
| Aug 26, 2:45 PM CDT | Flash Flood Warning | LSX | Montgomery | 4 hr |
| Aug 26, 2:56 PM CDT | Flash Flood Warning | ILX | Champaign, Douglas, Moultrie, Piatt | 3 hr |
| Aug 27, 6:48 PM CDT | Flash Flood Warning | PAH | Edwards | 61 min |
| Aug 30, 11:37 AM CDT | Flash Flood Warning | ILX | Clay, Richland | 3 hr |
| Aug 30, 2:54 PM CDT | Flash Flood Warning | LSX | Madison, Saint Clair | 3 hr |
| Aug 30, 5:22 PM CDT | Flash Flood Warning | PAH | Perry | 2 hr |
| Aug 31, 2:01 PM CDT | Flash Flood Warning | DVN | Henry, Mercer, Rock Island | 6 hr |
| Aug 31, 3:09 PM CDT | Flash Flood Warning | DVN | Henry, Rock Island | 2 hr |
| Aug 31, 3:49 PM CDT | Flash Flood Warning | DVN | Henry, Mercer | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Champaign County4
- Edwards County3
- Piatt County3
- Moultrie County3
- Cook County3
- DuPage County3
- Henry County3
- McLean County2
- Wayne County2
- DeWitt County2
- Douglas County2
- Shelby County2
- Madison County2
- Will County2
- Mercer County2
- Rock Island County2
- Wabash County1
- Bureau County1
- Hancock County1
- Henderson County1
- Ford County1
- Bond County1
- Massac County1
- Pope County1
- Boone County1
- McHenry County1
- Lake County1
- Kane County1
- Kendall County1
- Kankakee County1
- Coles County1
- Cumberland County1
- Montgomery County1
- Clay County1
- Richland County1
- Saint Clair County1
- Perry County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.