076
FLUS43 KLOT 152039
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
339 PM CDT FRI AUG 15 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-162045-
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-
339 PM CDT FRI AUG 15 2025 /439 PM EDT FRI AUG 15 2025/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TONIGHT.
WEATHER HAZARDS EXPECTED...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
LIMITED FLOODING RISK.
DISCUSSION...
SCATTERED THUNDERSTORMS ARE EXPECTED TONIGHT, MAINLY NORTH OF
I-80. THE STRONGEST STORMS COULD PRODUCE LOCALLY DAMAGING WINDS UP
TO 60 MPH AND TORRENTIAL RAINFALL WHICH COULD RESULT IN A
LOCALIZED FLASH FLOOD THREAT.
DAYS TWO THROUGH SEVEN
SATURDAY THROUGH THURSDAY.
SATURDAY AND SUNDAY...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
LIMITED FLOODING RISK.
LIMITED TO ELEVATED EXCESSIVE HEAT RISK.
MONDAY AND TUESDAY...
LIMITED THUNDERSTORM RISK.
LIMITED FLOODING RISK.
LIMITED EXCESSIVE HEAT RISK.
DISCUSSION...
THERE WILL BE PERIODIC CHANCES OF THUNDERSTORMS SATURDAY THROUGH
TUESDAY WITH A LIMITED RISK FOR SEVERE THUNDERSTORMS AND HEAVY
RAINFALL INDUCED LOCALIZED FLASH FLOODING.
AFTERNOON HEAT INDICES ABOVE 100 DEGREES ARE POSSIBLE AS WELL
SATURDAY THROUGH TUESDAY NEAR AND SOUTH OF I-80.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED THIS EVENING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST AT 40 MPH.
LMZ740>745-162045-
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-
339 PM CDT FRI AUG 15 2025
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 50 KT.
DAYS TWO THROUGH SEVEN
SATURDAY THROUGH THURSDAY.
SATURDAY AND SUNDAY...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
MONDAY AND TUESDAY...
LIMITED THUNDERSTORM RISK.
- IZZI
VISIT US AT WWW.WEATHER.GOV/CHICAGO
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page