Alert archive / Illinois / Flash Flood Warnings / 2026
Flash Flood Warnings in Illinois, March 2026
6 flash flood warnings in March 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 March 2026. Tap one for its archive.
- Flash Flood Warnings
- 6
- Busiest day
- March 11, 20264 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 |
|---|---|---|---|---|
| Mar 5, 12:49 AM CST | Flash Flood Warning | PAH | Alexander, Johnson, Pulaski, Union | 7 hr |
| Mar 6, 5:46 PM CST | Flash Flood Warning | LOT | Cook, Will | 3 hr |
| Mar 10, 8:01 PM CDT | Flash Flood Warning | DVN | Bureau | 3 hr |
| Mar 10, 8:10 PM CDT | Flash Flood Warning | LOT | LaSalle | 3 hr |
| Mar 10, 9:11 PM CDT | Flash Flood Warning | DVN | Henry | 90 min |
| Mar 11, 4:58 AM CDT | Flash Flood Warning | ILX | Macon | 86 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
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.