Alert archive / Illinois / Flash Flood Warnings
Flash Flood Warnings in Illinois, 1986
22 flash flood warnings in 1986. 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 1986. Tap one for its archive.
- Flash Flood Warnings
- 22
- Busiest month
- September10 flash flood warnings
- Busiest day
- October 3, 19865 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 |
|---|---|---|---|---|
| Jun 4, 3:36 PM CDT | Flash Flood Warning | DVN | Henry, Mercer | 114 min |
| Jun 9, 7:41 AM CDT | Flash Flood Warning | IND | White | 16 hr |
| Jul 8, 8:51 PM CDT | Flash Flood Warning | DVN | Rock Island, Whiteside | 3 hr |
| Jul 9, 7:27 PM CDT | Flash Flood Warning | LSX | Clinton, Marion | 3 hr |
| Jul 10, 9:30 PM CDT | Flash Flood Warning | DVN | Henry, Rock Island, Whiteside | 60 min |
| Jul 10, 9:30 PM CDT | Flash Flood Warning | DVN | Mercer | 60 min |
| Jul 11, 7:05 PM CDT | Flash Flood Warning | LSX | Perry | 4 hr |
| Sep 18, 3:23 AM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 3 hr |
| Sep 18, 4:55 AM CDT | Flash Flood Warning | PAH | Jackson | 3 hr |
| Sep 18, 7:04 AM CDT | Flash Flood Warning | LSX | Monroe | 3 hr |
| Sep 18, 9:45 AM CDT | Flash Flood Warning | LSX | Perry, Randolph | 3 hr |
| Sep 20, 12:33 AM CDT | Flash Flood Warning | ILX | DeWitt, Logan | 5 hr |
| Sep 20, 2:46 AM CDT | Flash Flood Warning | ILX | Sangamon | 4 hr |
| Sep 21, 3:39 AM CDT | Flash Flood Warning | DVN | Jo Daviess | 66 min |
| Sep 25, 12:24 AM CDT | Flash Flood Warning | LOT | Lake, McHenry | 5 hr |
| Sep 26, 2:40 PM CDT | Flash Flood Warning | LOT | Lake, McHenry | 3 hr |
| Sep 28, 8:00 PM CDT | Flash Flood Warning | LOT | Lake | 4 hr |
| Oct 2, 9:53 PM CDT | Flash Flood Warning | LSX | Adams, Brown, Pike | 3 hr |
| Oct 3, 1:09 AM CDT | Flash Flood Warning | LSX | Adams | 3 hr |
| Oct 3, 4:48 AM CDT | Flash Flood Warning | LSX | Adams | 4 hr |
| Oct 3, 6:42 PM CDT | Flash Flood Warning | LSX | Madison | 2 hr |
| Oct 3, 6:42 PM CDT | Flash Flood Warning | LSX | Saint Clair | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lake County3
- Adams County3
- Henry County2
- Mercer County2
- Rock Island County2
- Whiteside County2
- Perry County2
- Monroe County2
- Saint Clair County2
- McHenry County2
- White County1
- Clinton County1
- Marion County1
- Jackson County1
- Randolph County1
- DeWitt County1
- Logan County1
- Sangamon County1
- Jo Daviess County1
- Brown County1
- Pike County1
- Madison County1
The busiest days
Days with the most alerts issued, by UTC date.
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.