Illinois Severe Flash Flood Warning | Effective 09/20/2026 03:09
At 509 AM CDT, Doppler radar indicated thunderstorms produced heavy
rain across the warned area. Between 3 and 6 inches of rain have
fallen with the highest amounts across Lee County. While the heavy
rain has ended, additional heavy rain is possible later this morning.
Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches,
streets, underpasses, low-lying areas, and other poor