216
FLUS43 KLOT 211518
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1018 AM CDT SUN JUN 21 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-221530-
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-
1018 AM CDT SUN JUN 21 2026 /1118 AM EDT SUN JUN 21 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 SOUTH OF I-80...WITH AN ASSOCIATED:
LEVEL 1 OF 5 DAMAGING WIND RISK...UP TO 60 MPH.
ELEVATED FLOODING RISK.
HIGH SWIM RISK LAKE MICHIGAN BEACHES TONIGHT.
DISCUSSION...
WIDESPREAD SOAKING RAINFALL WITH LOCALIZED CORRIDORS OF
TORRENTIAL RAINFALL MAY LEAD TO FLOODING IN SOME AREAS TODAY. THE
GREATEST LIKELIHOOD OF FLOODING IS PRESENT NEAR AND SOUTH OF I-88.
A FEW THUNDERSTORMS MAY ALSO OCCUR, ESPECIALLY WELL SOUTH OF I-
80, WHERE THERE IS ALSO A CONDITIONAL THREAT FOR A FEW SEVERE
STORMS SOUTH OF A PONTIAC, IL TO RENSSELAER, IN LINE.
STRENGTHENING ONSHORE WINDS WILL CAUSE THE THREAT FOR RIP
CURRENTS AT SOUTHERN LAKE MICHIGAN BEACHES TO RAMP THIS EVENING
AND CONTINUE THROUGH TONIGHT.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
MONDAY...
HIGH SWIM RISK LAKE MICHIGAN BEACHES.
TUESDAY NIGHT THROUGH SATURDAY...
LIMITED THUNDERSTORM RISK.
DISCUSSION...
AN ELEVATED DANGER FOR RIP CURRENTS AT SOUTHERN LAKE MICHIGAN
BEACHES WILL CONTINUE INTO MONDAY.
PERIODIC THUNDERSTORM CHANCES ARE CURRENTLY FORECASTED TUESDAY
NIGHT THROUGH SATURDAY.
SPOTTER INFORMATION STATEMENT
SPOTTERS MAY BE NEEDED WELL SOUTH OF I-80 THIS AFTERNOON AND
EVENING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST AT 30 TO 40 MPH.
LMZ740>745-221530-
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-
1018 AM CDT SUN JUN 21 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...
HAZARDOUS CONDITIONS FOR SMALL CRAFT.
LIMITED THUNDERSTORM RISK.
DAYS TWO THROUGH SEVEN
MONDAY THROUGH SATURDAY.
MONDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
WEDNESDAY THROUGH SATURDAY...
LIMITED THUNDERSTORM RISK.
YACK
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