715
FLUS43 KLOT 271918
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
218 PM CDT MON JUL 27 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-281930-
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-
218 PM CDT MON JUL 27 2026 /318 PM EDT MON JUL 27 2026/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 TORNADO RISK.
LEVEL 3 OF 5 DAMAGING WIND RISK...UP TO 70 MPH.
LEVEL 2 OF 5 LARGE HAIL RISK...UP TO GOLF BALL SIZE.
ELEVATED FLOODING RISK.
SIGNIFICANT EXCESSIVE HEAT RISK.
HIGH SWIM RISK LAKE MICHIGAN BEACHES LATE TONIGHT.
DISCUSSION...
PERIODS OF THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING.
ANY STORMS THAT DEVELOP MAY BECOME SEVERE AND FEATURE DAMAGING TO
DESTRUCTIVE WIND GUSTS, LARGE HAIL, AND LOCALIZED FLASH FLOODING.
OUTSIDE OF AREAS IMPACTED BY AFTERNOON THUNDERSTORMS, DANGEROUS
HEAT AND HUMIDITY WILL CONTINUE THROUGH THE REMAINDER OF THIS
AFTERNOON.
GUSTY NORTHERLY WINDS WILL LEAD TO HIGH WAVES AND DANGEROUS
SWIMMING CONDITIONS AT LAKE MICHIGAN BEACHES LATE TONIGHT THROUGH
WEDNESDAY MORNING.
DAYS TWO THROUGH SEVEN
TUESDAY THROUGH SUNDAY.
TUESDAY...
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
FRIDAY...
ELEVATED FLOODING RISK.
LIMITED THUNDERSTORM RISK.
SATURDAY AND SUNDAY...
LIMITED THUNDERSTORM RISK.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED THIS AFTERNOON AND EVENING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE SOUTHEAST AT 40 MPH.
LMZ740>745-281930-
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-
218 PM CDT MON JUL 27 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...
HAZARDOUS CONDITIONS FOR SMALL CRAFT.
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
THUNDERSTORM WATERSPOUT RISK
LEVEL 3 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 60 KNOTS.
LEVEL 2 OF 5 HAIL RISK...UP TO GOLF BALL SIZE.
DAYS TWO THROUGH SEVEN
TUESDAY THROUGH SUNDAY.
TUESDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
FRIDAY AND SATURDAY...
LIMITED THUNDERSTORM RISK.
DOOM
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