287
WGUS63 KLOT 190249
FFALOT
FLOOD WATCH
NATIONAL WEATHER SERVICE CHICAGO IL
949 PM CDT FRI SEP 18 2026
ILZ003>005-008-191100-
/O.CON.KLOT.FA.A.0016.260919T0600Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINNEBAGO-BOONE-MCHENRY-OGLE-
INCLUDING THE CITIES OF BYRON, BELVIDERE, MCHENRY, ALGONQUIN, CRYSTAL
LAKE, WOODSTOCK, ROCHELLE, OREGON, AND ROCKFORD
949 PM CDT FRI SEP 18 2026
...FLOOD WATCH REMAINS IN EFFECT FROM 1 AM CDT SATURDAY THROUGH
SATURDAY AFTERNOON...
* WHAT...FLASH FLOODING CAUSED BY EXCESSIVE RAINFALL CONTINUES TO BE
POSSIBLE.
* WHERE...PORTIONS OF NORTH CENTRAL AND NORTHEAST ILLINOIS, INCLUDING
THE FOLLOWING COUNTIES, IN NORTH CENTRAL ILLINOIS, BOONE, OGLE AND
WINNEBAGO. IN NORTHEAST ILLINOIS, MCHENRY.
* WHEN...FROM 1 AM CDT SATURDAY THROUGH SATURDAY AFTERNOON.
* IMPACTS...CREEKS AND STREAMS MAY RISE OUT OF THEIR BANKS. ROADS AND
STREETS MAY BE FLOODED.
* ADDITIONAL DETAILS...
- SHOWERS AND THUNDERSTORMS OVERNIGHT INTO SATURDAY MORNING MAY
PRODUCE WIDESPREAD RAINFALL RATES UP TO 2 INCHES PER HOUR THAT
COULD LEAD TO FLASH FLOODING.
ADDITIONAL THUNDERSTORMS SATURDAY EVENING INTO EARLY SUNDAY
MORNING HAVE THE POTENTIAL TO PRODUCE TORRENTIAL RAINFALL THAT
RESULTS IN FLASH FLOODING, THOUGH THE EXACT PLACEMENT OF THIS
RAINFALL REMAINS UNCLEAR. A SECOND FLOOD WATCH FOR FLASH FLOODING
MAY BE NEEDED DURING THIS PERIOD.
- 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.
ILZ006-010>013-020-103>106-INZ001-002-191100-
/O.CON.KLOT.FA.A.0016.260919T0900Z-260919T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAKE IL-LEE-DE KALB-KANE-DUPAGE-KENDALL-NORTHERN COOK-CENTRAL
COOK-SOUTHERN COOK-NORTHERN WILL-LAKE IN-PORTER-
INCLUDING THE CITIES OF CAROL STREAM, BUFFALO GROVE, DEKALB, OAK
FOREST, NAPERVILLE, PARK FOREST, LOMBARD, DES PLAINES, HAMMOND,
CHESTERTON, PLAINFIELD, OSWEGO, MOKENA, LA GRANGE, CICERO, WHEATON,
NORTHBROOK, PORTAGE, VALPARAISO, PLANO, OAK LAWN, BOLINGBROOK, OAK
PARK, SYCAMORE, CHICAGO, CALUMET CITY, ORLAND PARK, MERRILLVILLE,
GURNEE, SCHAUMBURG, GARY, JOLIET, PALATINE, DOWNERS GROVE, ELGIN,
LEMONT, DIXON, AURORA, MUNDELEIN, EVANSTON, YORKVILLE, AND WAUKEGAN
949 PM CDT FRI SEP 18 2026
...FLOOD WATCH REMAINS IN EFFECT FROM 4 AM CDT SATURDAY THROUGH
SATURDAY AFTERNOON...
* WHAT...FLASH FLOODING CAUSED BY EXCESSIVE RAINFALL CONTINUES TO BE
POSSIBLE.
* WHERE...PORTIONS OF ILLINOIS, INCLUDING THE FOLLOWING AREAS,
CENTRAL COOK, DE KALB, DUPAGE, KANE, KENDALL, LAKE IL, LEE,
NORTHERN COOK, NORTHERN WILL AND SOUTHERN COOK AND NORTHWEST
INDIANA, INCLUDING THE FOLLOWING AREAS, LAKE IN AND PORTER.
* WHEN...FROM 4 AM CDT SATURDAY THROUGH SATURDAY AFTERNOON.
* 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...
- SHOWERS AND THUNDERSTORMS LATE TONIGHT THROUGH SATURDAY MORNING
MAY PRODUCE WIDESPREAD RAINFALL RATES UP TO 2 INCHES PER HOUR
THAT COULD LEAD TO FLASH FLOODING, PARTICULARLY OVER URBAN AREAS.
ADDITIONAL THUNDERSTORMS SATURDAY EVENING INTO EARLY SUNDAY
MORNING HAVE THE POTENTIAL TO PRODUCE TORRENTIAL RAINFALL THAT
RESULTS IN FLASH FLOODING, THOUGH THE EXACT PLACEMENT OF THIS
RAINFALL REMAINS UNCLEAR. A SECOND FLOOD WATCH FOR FLASH FLOODING
MAY BE NEEDED DURING THIS PERIOD.
- 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.
OGOREK
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