167
FLUS43 KLOT 202022
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
322 PM CDT SUN JUL 20 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-212030-
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-
322 PM CDT SUN JUL 20 2025 /422 PM EDT SUN JUL 20 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 SOUTH OF
US ROUTE 24.
ELEVATED FLOODING RISK SOUTH OF US ROUTE 24.
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
DISCUSSION...
THERE IS A CHANCE FOR THUNDERSTORMS THIS AFTERNOON THROUGH THIS
EVENING, MAINLY SOUTH OF A PONTIAC TO RENSSELAER LINE. THE MAIN
THREAT FROM THESE STORMS WILL BE DAMAGING WINDS AND VERY HEAVY
RAIN.
DANGEROUS SWIMMING CONDITIONS CONTINUE FOR THE ILLINOIS AND
INDIANA BEACHES OF LAKE MICHIGAN THROUGH TONIGHT.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
MONDAY...
LIMITED THUNDERSTORM RISK SOUTH OF I-80.
HIGH SWIM RISK LAKE MICHIGAN BEACHES IN THE MORNING.
WEDNESDAY...
SIGNIFICANT EXCESSIVE HEAT RISK.
THURSDAY NIGHT...
LIMITED THUNDERSTORM RISK.
ELEVATED EXCESSIVE HEAT RISK.
FRIDAY AND SATURDAY...
LIMITED THUNDERSTORM RISK.
LIMITED EXCESSIVE HEAT RISK.
DISCUSSION...
DANGEROUS HEAT AND HUMIDITY IS EXPECTED WEDNESDAY AND THURSDAY,
AND POSSIBLY STRETCHING INTO FRIDAY.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED LATE THIS AFTERNOON AND EVENING TOWARD
CENTRAL IL.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST-SOUTHEAST AT 40 MPH.
LMZ740>745-212030-
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-
322 PM CDT SUN JUL 20 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...
HAZARDOUS CONDITIONS FOR SMALL CRAFT.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
MONDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
THURSDAY THROUGH SATURDAY...
LIMITED THUNDERSTORM RISK.
DOOM
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