Illinois Severe Flash Flood Warning | Effective 07/04/2026 12:03

Headline: 
Flash Flood Warning issued July 4 at 2:03PM CDT until July 4 at 5:00PM CDT by NWS Chicago IL
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
July 4, 2026 - 12:03pm
Expires: 
July 4, 2026 - 3:00pm
Description: 
FFWLOT The National Weather Service in Chicago has issued a * Flash Flood Warning for... Southern De Kalb County in north central Illinois... Northern La Salle County in north central Illinois... Southeastern Lee County in north central Illinois... * Until 500 PM CDT. * At 203 PM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing torrential rainfall over the warned area. Up to 2 inches of rain have fallen over portions of southern DeKalb County. The expected rainfall rate is 1 to 2 inches in 1 hour. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding. SOURCE...Radar and automated gauges. IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas. * Some locations that will experience flash flooding include... Southern sections of DeKalb, Sandwich, Mendota, Sheridan, Shabbona, Lake Holiday, Hinckley, Somonauk, Earlville, Waterman, Leland, Paw Paw, Millington, Lee, Compton, West Brooklyn, Harding and Triumph.
Instruction: 
A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Area Description: 
De Kalb, IL; La Salle, IL; Lee, IL
Forcast Office: 
NWS Chicago IL