817
FLUS43 KLOT 260853
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
353 AM CDT SUN JUL 26 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-270900-
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-
353 AM CDT SUN JUL 26 2026 /453 AM EDT SUN JUL 26 2026/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 2 OF 5 DAMAGING WIND RISK...UP TO 70 MPH.
LEVEL 1 OF 5 LARGE HAIL RISK...UP TO 1 INCH IN DIAMETER.
LEVEL 1 OF 5 TORNADO RISK.
LIMITED FLOODING RISK.
LIMITED TO ELEVATED EXCESSIVE HEAT RISK.
DISCUSSION...
PEAK AFTERNOON HEAT INDICES OF 100 TO 105 DEGREES ARE EXPECTED
THIS AFTERNOON, ESPECIALLY NEAR AND WEST OF THE I-39 CORRIDOR.
THUNDERSTORMS ARE POSSIBLE FROM LATE THIS EVENING THROUGH THE
OVERNIGHT HOURS. 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 AND MONDAY EVENING...
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 2 OF 5 SEVERE THUNDERSTORM RISK.
LIMITED FLOODING RISK.
ELEVATED EXCESSIVE HEAT RISK.
LATE MONDAY NIGHT THROUGH WEDNESDAY MORNING...
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
DISCUSSION...
THERE IS A CHANCE OF THUNDERSTORMS AT TIMES MONDAY MORNING INTO
MONDAY EVENING. IF STORMS DO OCCUR, THERE IS A CHANCE THAT THE
COULD BECOME SEVERE, CAPABLE OF 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 LATE THIS EVENING INTO THE OVERNIGHT.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE SOUTHEAST AT AROUND 40 MPH.
LMZ740>745-270900-
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-
353 AM 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
TODAY AND 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...
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.
- IZZI
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