975
FLUS43 KLOT 151110
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
610 AM CDT THU MAY 15 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-161115-
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-
610 AM CDT THU MAY 15 2025 /710 AM EDT THU MAY 15 2025/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
DAY ONE
TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED FOG RISK FAR NORTHEAST ILLINOIS EARLY IN THE MORNING.
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 3 OF 5 LARGE HAIL RISK...UP TO 3 INCH DIAMETER.
LEVEL 3 OF 5 DAMAGING WIND RISK...UP TO 80 MPH.
LEVEL 3 OF 5 TORNADO RISK.
ELEVATED FIRE WEATHER RISK.
LIMITED NON-THUNDERSTORM WIND RISK.
DISCUSSION...
DENSE FOG CONTINUES EARLY THIS MORNING ACROSS FAR NORTHEAST
ILLINOIS. THIS WILL GRADUALLY ERODE AFTER SUNRISE THROUGH MID
MORNING.
ISOLATED TO SCATTERED SEVERE THUNDERSTORMS ARE EXPECTED TO
DEVELOP MID AFTERNOON INTO THE EVENING, WITH THE GREATEST
COVERAGE EXPECTED EAST OF INTERSTATE 39. ANY STORMS THAT DEVELOP
WILL BE CAPABLE OF PRODUCING DESTRUCTIVE WINDS AND HAIL. A TORNADO
THREAT MAY DEVELOP AS WELL WITH THE MOST INTENSE STORMS.
LATE THIS AFTERNOON INTO EARLY EVENING, AN ELEVATED FIRE DANGER
MAY DEVELOP MAINLY ALONG AND WEST OF INTERSTATE 39.
DAYS TWO THROUGH SEVEN
FRIDAY THROUGH WEDNESDAY.
FRIDAY...
SIGNIFICANT FIRE WEATHER RISK.
LIMITED NON-THUNDERSTORM WIND RISK.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
DISCUSSION...
CRITICAL FIRE DANGER MAY DEVELOP AREAWIDE FRIDAY AFTERNOON DUE TO
A COMBINATION OF STRONG WINDS UP TO 45 MPH AND DRY CONDITIONS. IN
ADDITION, THUNDERSTORMS MAY DEVELOP LATE FRIDAY AFTERNOON AND
EVENING WITH A THREAT FOR DAMAGING WINDS AND HAIL.
SPOTTER INFORMATION STATEMENT
SPOTTERS WILL LIKELY BE NEEDED THIS AFTERNOON AND EVENING.
GENERAL STORM MOTION OF THE DAY:
MOVING TOWARD THE EAST NORTHEAST AT 40 TO 50 MPH.
LMZ740>745-161115-
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-
610 AM CDT THU MAY 15 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
TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED...
ELEVATED FOG RISK IN THE MORNING.
HAZARDOUS CONDITIONS FOR SMALL CRAFT.
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 3 OF 5 HAIL RISK...UP TO 3 INCH DIAMETER.
LEVEL 3 OF 5 THUNDERSTORM WIND GUST RISK...UP TO 70 KT.
THUNDERSTORM WATERSPOUT RISK
DAYS TWO THROUGH SEVEN
FRIDAY THROUGH WEDNESDAY.
FRIDAY...
GALE FORCE WINDS POSSIBLE.
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
SATURDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
MONDAY THROUGH WEDNESDAY...
HAZARDOUS CONDITIONS FOR SMALL CRAFT ARE LIKELY.
PETR
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