479  
WGUS83 KLOT 171149  
FLSLOT  
 
FLOOD ADVISORY  
NATIONAL WEATHER SERVICE CHICAGO IL  
649 AM CDT THU SEP 17 2026  
 
ILC037-099-103-171545-  
/O.NEW.KLOT.FA.Y.0119.260917T1149Z-260917T1545Z/  
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/  
DE KALB IL-LA SALLE IL-LEE IL-  
649 AM CDT THU SEP 17 2026  
   
..FLOOD ADVISORY IN EFFECT UNTIL 1045 AM CDT THIS MORNING  
 
* 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  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
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.  
 
 
 
LAT...LON 4175 8963 4172 8860 4146 8860 4155 8917  
4158 8917 4158 8963  
 
 
 
KLUBER  
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