915
WGUS63 KLOT 092203
FFALOT
URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE CHICAGO IL
503 PM CDT SUN AUG 9 2026
ILZ005-006-011>013-020-021-023-103>108-INZ001-002-010-011-100615-
/O.NEW.KLOT.FA.A.0011.260810T0200Z-260810T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MCHENRY-LAKE IL-DE KALB-KANE-DUPAGE-KENDALL-GRUNDY-KANKAKEE-
NORTHERN COOK-CENTRAL COOK-SOUTHERN COOK-NORTHERN WILL-SOUTHERN
WILL-EASTERN WILL-LAKE IN-PORTER-NEWTON-JASPER-
INCLUDING THE CITIES OF PARK FOREST, AURORA, CRYSTAL LAKE,
SCHAUMBURG, OAK FOREST, JOLIET, MERRILLVILLE, KANKAKEE, CHESTERTON,
ALGONQUIN, LA GRANGE, CHICAGO, MANHATTAN, LEMONT, BUFFALO GROVE,
OSWEGO, DEKALB, PALATINE, HAMMOND, CICERO, MINOOKA, DOWNERS GROVE,
CHANNAHON, SYCAMORE, PORTAGE, DEMOTTE, YORKVILLE, MORRIS, WILMINGTON,
BRADLEY, BEECHER, GURNEE, MOROCCO, OAK LAWN, CALUMET CITY,
BOURBONNAIS, PLANO, BOLINGBROOK, ELGIN, CRETE, WAUKEGAN, RENSSELAER,
EVANSTON, ORLAND PARK, COAL CITY, MOKENA, NAPERVILLE, CAROL STREAM,
OAK PARK, LOMBARD, PEOTONE, WOODSTOCK, DES PLAINES, GARY, NORTHBROOK,
PLAINFIELD, MCHENRY, ROSELAWN, WHEATON, MUNDELEIN, VALPARAISO, AND
KENTLAND
503 PM CDT SUN AUG 9 2026
...FLOOD WATCH IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH EARLY
MONDAY MORNING...
* WHAT...FLASH FLOODING CAUSED BY EXCESSIVE RAINFALL IS POSSIBLE.
* WHERE...PORTIONS OF ILLINOIS, INCLUDING THE FOLLOWING AREAS,
CENTRAL COOK, DE KALB, DUPAGE, EASTERN WILL, GRUNDY, KANE,
KANKAKEE, KENDALL, LAKE IL, MCHENRY, NORTHERN COOK, NORTHERN WILL,
SOUTHERN COOK AND SOUTHERN WILL AND NORTHWEST INDIANA, INCLUDING
THE FOLLOWING AREAS, JASPER, LAKE IN, NEWTON AND PORTER.
* WHEN...FROM 9 PM CDT THIS EVENING THROUGH EARLY MONDAY MORNING.
* IMPACTS...CREEKS AND STREAMS MAY RISE OUT OF THEIR BANKS. FLOODING
MAY OCCUR IN POOR DRAINAGE AND URBAN AREAS. ROADS AND STREETS MAY
BE FLOODED.
* ADDITIONAL DETAILS...
- THE POTENTIAL EXISTS FOR REPEATED ROUNDS OF SHOWERS AND
THUNDERSTORMS DEVELOPING ALONG A STALLED SURFACE FRONT. LOCALIZED
RAINFALL RATES MAY EXCEED 2 INCHES PER HOUR OVER PORTIONS OF
NORTHEAST ILLINOIS AND NORTHWEST INDIANA LATE THIS EVENING
THROUGH TONIGHT. PORTIONS OF THE WATCH AREA RECEIVED 1 TO 3
INCHES OF RAINFALL EARLIER TODAY AND WILL BE MORE SUSCEPTIBLE TO
FLOODING WITH ANY ADDITIONAL HEAVY RAINFALL.
- HTTP://WWW.WEATHER.GOV/SAFETY/FLOOD
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD WATCH FOR FLASH FLOODING MEANS RAPID-ONSET FLOODING IS
POSSIBLE, BUT NOT YET CERTAIN, BASED UPON THE LATEST FORECASTS. FLASH
FLOODING IS A DANGEROUS SITUATION. PERSONS WITH INTERESTS ALONG AREA
RIVERS, CREEKS, AND OTHER WATERWAYS SHOULD MONITOR THE LATEST
FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.
PETR
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