Alert archive / Illinois / Flash Flood Warnings / 2020
Flash Flood Warnings in Illinois, August 2020
14 flash flood warnings in August 2020. 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 2020. Tap one for its archive.
- Flash Flood Warnings
- 14
- Busiest day
- August 12, 20206 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 9, 12:01 AM CDT | Flash Flood Warning | LSX | Calhoun | 6 hr |
| Aug 9, 2:41 AM CDT | Flash Flood Warning | LSX | Madison, Monroe, Saint Clair | 6 hr |
| Aug 9, 10:06 AM CDT | Flash Flood Warning | LSX | Madison | 4 hr |
| Aug 9, 10:23 AM CDT | Flash Flood Warning | LSX | Saint Clair | 4 hr |
| Aug 12, 9:41 AM CDT | Flash Flood Warning | LSX | Madison, Saint Clair | 5 hr |
| Aug 12, 10:19 AM CDT | Flash Flood Warning | LSX | Madison, Saint Clair | 4 hr |
| Aug 12, 11:18 AM CDT | Flash Flood Warning | LSX | Monroe, Randolph, Saint Clair | 3 hr |
| Aug 12, 11:42 AM CDT | Flash Flood Warning | PAH | Jackson | 3 hr |
| Aug 12, 11:47 AM CDT | Flash Flood Warning | LSX | Clinton, Randolph, Saint Clair, Washington | 6 hr |
| Aug 12, 12:06 PM CDT | Flash Flood Warning | PAH | Perry | 3 hr |
| Aug 13, 12:17 PM CDT | Flash Flood Warning | LSX | Monroe, Randolph, Saint Clair | 6 hr |
| Aug 13, 1:24 PM CDT | Flash Flood Warning | PAH | Franklin | 2 hr |
| Aug 15, 9:19 PM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 3 hr |
| Aug 25, 3:32 PM CDT | Flash Flood Warning | LOT | Boone, DeKalb, Ogle, Winnebago | 3 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.