430
WGUS73 KLOT 201009
FFSLOT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
509 AM CDT SUN SEP 20 2026
ILC037-099-103-201300-
/O.CON.KLOT.FF.W.0058.000000T0000Z-260920T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DE KALB IL-LA SALLE IL-LEE IL-
509 AM CDT SUN SEP 20 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING
FOR SOUTHERN DE KALB, NORTHERN LA SALLE AND LEE COUNTIES...
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
DRAINAGE AREAS.
SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
SANDWICH, MENDOTA, AMBOY, SHERIDAN, SHABBONA, LAKE HOLIDAY,
HINCKLEY, SOMONAUK, EARLVILLE, WATERMAN, SERENA, LELAND, PAW PAW,
SUBLETTE, WOODHAVEN LAKES, MILLINGTON, LEE, COMPTON, TROY GROVE,
NELSON, WEST BROOKLYN, HARMON, TRIUMPH, PRAIRIE CENTER AND LEE
CENTER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
LAT...LON 4180 8963 4179 8860 4145 8860 4145 8917
4158 8917 4158 8950 4159 8963
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5 INCHES IN 1 HOUR
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