211
FLUS43 KLOT 261947
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
247 PM CDT SUN JUL 26 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-272000-
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-
247 PM CDT SUN JUL 26 2026 /347 PM EDT SUN JUL 26 2026/
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 2 OF 5 DAMAGING WIND RISK...UP TO 70 MPH.
LEVEL 2 OF 5 LARGE HAIL RISK...UP TO 1 INCH IN DIAMETER.
LEVEL 1 OF 5 TORNADO RISK.
LIMITED FLOODING RISK.
DISCUSSION...
THUNDERSTORMS ARE POSSIBLE LATE THIS EVENING, BUT MAINLY VERY LATE
TONIGHT INTO EARLY MONDAY MORNING. IF THUNDERSTORMS DO OCCUR,
SOME COULD BE SEVERE, WITH THE PRIMARY SEVERE THREAT BEING LOCALLY
DAMAGING WINDS TO 70 MPH. THUNDERSTORMS WILL ALSO BE CAPABLE OF
PRODUCING TORRENTIAL DOWNPOURS, WHICH COULD LEAD TO SOME LOCALIZED
FLOODING.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
MONDAY...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 2 OF 5 SEVERE THUNDERSTORM RISK.
LIMITED FLOODING RISK.
LIMITED TO ELEVATED EXCESSIVE HEAT RISK.
LATE MONDAY NIGHT THROUGH WEDNESDAY MORNING...
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
THURSDAY THROUGH SATURDAY...
LIMITED THUNDERSTORM RISK AT TIMES.
DISCUSSION...
THUNDERSTORMS ARE POSSIBLE MONDAY MORNING, SOME OF WHICH MAY
PRODUCE LOCALLY DAMAGING WIND GUSTS AND LARGE HAIL.
AN ADDITIONAL ROUND OF THUNDERSTORMS MAY OCCUR LATE MONDAY
AFTERNOON INTO THE EVENING. ANY STORMS THAT DO DEVELOP WOULD
LIKELY BECOME SEVERE AND BE CAPABLE OF PRODUCING DAMAGING WINDS
AND LARGE HAIL.
IN AREAS NOT AFFECTED BY STORMS OR CLOUDINESS FROM STORMS, PEAK
HEAT INDICES OF 100 TO 110 DEGREES ARE POSSIBLE MONDAY AFTERNOON.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED OVERNIGHT INTO MONDAY MORNING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE SOUTHEAST AT AROUND 40 MPH.
LMZ740>745-272000-
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-
247 PM CDT SUN JUL 26 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 2 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 60 KNOTS.
LEVEL 1 OF 5 HAIL RISK...UP TO 1 INCH IN DIAMETER.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
MONDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE POSSIBLE.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 2 OF 5 SEVERE THUNDERSTORM RISK.
LATE MONDAY NIGHT THROUGH TUESDAY NIGHT...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
FRIDAY AND SATURDAY...
LIMITED THUNDERSTORM RISK.
CARLAW
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