300
FLUS43 KLOT 150211
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
911 PM CDT FRI AUG 14 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-160215-
WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-
LA SALLE-KENDALL-GRUNDY-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-
NORTHERN COOK-CENTRAL COOK-SOUTHERN COOK-NORTHERN WILL-
SOUTHERN WILL-EASTERN WILL-LAKE IN-PORTER-NEWTON-JASPER-BENTON-
911 PM CDT FRI AUG 14 2026 /1011 PM EDT FRI AUG 14 2026/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TONIGHT.
WEATHER HAZARDS EXPECTED...
SIGNIFICANT FLOODING RISK, ESPECIALLY ALONG AND SOUTH OF INTERSTATE 80.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
DISCUSSION...
ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED TONIGHT WITH THE
HIGHEST COVERAGE FAVORED ALONG AND SOUTH OF INTERSTATE 80.
TORRENTIAL RAIN RATES MAY LEAD TO WIDESPREAD FLASH FLOODING. IN
ADDITION, LOCALLY DAMAGING WINDS CANNOT BE RULED OUT.
DAYS TWO THROUGH SEVEN
SATURDAY THROUGH THURSDAY.
SATURDAY...
SIGNIFICANT FLOODING RISK SOUTH OF INTERSTATE 80 IN THE MORNING.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
SUNDAY...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
TUESDAY AND WEDNESDAY...
LIMITED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
DISCUSSION...
A STRONG TO SEVERE STORM CANNOT BE RULED OUT SATURDAY NIGHT INTO
EARLY SUNDAY MORNING. THEN, ADDITIONAL STORMS MAY OCCUR DURING THE
MIDDLE OF NEXT WEEK.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED TONIGHT FOR FLASH FLOODING REPORTS.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST AT 30 MPH.
LMZ740>745-160215-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
BURNS HARBOR TO MICHIGAN CITY IN-
911 PM CDT FRI AUG 14 2026
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE ILLINOIS
NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE
WATERS OF LAKE MICHIGAN.
DAY ONE
TONIGHT.
WEATHER HAZARDS EXPECTED...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 40 KNOTS.
DAYS TWO THROUGH SEVEN
SATURDAY THROUGH THURSDAY.
SATURDAY...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
SUNDAY THROUGH THURSDAY...
LIMITED THUNDERSTORM RISK AT TIMES.
YACK
VISIT US AT WWW.WEATHER.GOV/CHICAGO
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page