966
FLUS43 KLOT 222008
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
308 PM CDT TUE JUL 22 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-232015-
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-
308 PM CDT TUE JUL 22 2025 /408 PM EDT TUE JUL 22 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.
DISCUSSION...
THERE IS A SLIGHT CHANCE OF A THUNDERSTORM TOWARD SUNRISE OVER
NORTH CENTRAL ILLINOIS.
DAYS TWO THROUGH SEVEN
WEDNESDAY THROUGH MONDAY.
WEDNESDAY...
SIGNIFICANT EXCESSIVE HEAT RISK.
LIMITED THUNDERSTORM RISK.
THURSDAY...
SIGNIFICANT EXCESSIVE HEAT RISK.
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
LIMITED FLOODING RISK.
FRIDAY AND SATURDAY...
LIMITED THUNDERSTORM AND FLOODING RISK.
SUNDAY AND MONDAY...
LIMITED EXCESSIVE HEAT RISK.
DISCUSSION...
DANGEROUS HEAT AND HUMIDITY WITH PEAK AFTERNOON HEAT INDEX VALUES
OF 100 TO 110 DEGREES ARE EXPECTED WEDNESDAY AND THURSDAY.
THERE IS A SLIGHT CHANCE OF A THUNDERSTORM IN THE ROCKFORD
VICINITY EARLY WEDNESDAY MORNING.
THE CHANCE OF THUNDERSTORMS WILL INCREASE LATE THURSDAY AFTERNOON
NEAR THE WISCONSIN BORDER, WITH THUNDERSTORM CHANCES GRADUALLY
SPREADING SOUTH ACROSS THE REMAINDER OF NORTHERN ILLINOIS THURSDAY
EVENING. ANY THUNDERSTORMS THAT DO OCCUR WILL BE CAPABLE OF
PRODUCING TORRENTIAL RAINFALL AND LOCALIZED FLASH FLOODING WITH A
SLIGHT CHANCE OF LOCALLY DAMAGING WINDS.
WHILE THERE WILL BE MANY DRY HOURS, THERE WILL BE PERIODIC
CHANCES OF THUNDERSTORMS FRIDAY THROUGH MONDAY.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
LMZ740>745-232015-
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-
308 PM CDT TUE JUL 22 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.
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
DAYS TWO THROUGH SEVEN
WEDNESDAY THROUGH MONDAY.
THURSDAY NIGHT...
ELEVATED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LEVEL 1 OF 5 SEVERE THUNDERSTORM RISK.
FRIDAY AND SATURDAY...
LIMITED THUNDERSTORM RISK.
- IZZI
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