Illinois Minor Flood Advisory | Effective 09/17/2026 04:49

Headline: 
Flood Advisory issued September 17 at 6:49AM CDT until September 17 at 10:45AM CDT by NWS Chicago IL
Event: 
Flood Advisory
Urgency: 
Expected
Effective: 
September 17, 2026 - 4:49am
Expires: 
September 17, 2026 - 8:45am
Description: 
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Southern De Kalb County in north central Illinois... Northern La Salle County in north central Illinois... Southern Lee County in north central Illinois... * WHEN...Until 1045 AM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 649 AM CDT, Doppler radar and automated rain gauges indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 3 inches of rain have fallen. - Additional rainfall amounts up to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Sandwich, Mendota, Amboy, Sheridan, Lake Holiday, Somonauk, Earlville, Serena, Leland, Paw Paw, Sublette, Woodhaven Lakes, Millington, Compton, West Brooklyn, Harmon and Harding. - http://www.weather.gov/safety/flood
Instruction: 
A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters.
Area Description: 
De Kalb, IL; La Salle, IL; Lee, IL
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov