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Home Return to list Severe Thunderstorm Watch 0550 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-08-09 20:44:34 877 WWUS63 KLOT 100144 WCNLOT WATCH COUNTY NOTIFICATION FOR WATCH 550 NATIONAL WEATHER SERVICE CHICAGO IL 844 PM CDT SUN AUG 9 2026 ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111- 141-197-201-INC007-073-089-111-127-100900- /O.NEW.KLOT.SV.A.0550.260810T0144Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 550 IN EFFECT UNTIL 4 AM CDT /5 AM EDT/ MONDAY FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 18 COUNTIES IN CENTRAL ILLINOIS LIVINGSTON IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN NORTH CENTRAL ILLINOIS BOONE DE KALB LA SALLE LEE OGLE WINNEBAGO IN NORTHEAST ILLINOIS COOK DUPAGE GRUNDY KANE KANKAKEE KENDALL LAKE IL MCHENRY WILL IN INDIANA THIS WATCH INCLUDES 5 COUNTIES IN NORTHWEST INDIANA BENTON JASPER LAKE IN NEWTON PORTER THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, BYRON, CAROL STREAM, CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DEMOTTE, DIXON, DOWNERS GROVE, DWIGHT, ELGIN, EVANSTON, FAIRBURY, FOWLER, GARY, GIBSON CITY, GILMAN, GURNEE, HAMMOND, JOLIET, KANKAKEE, KENTLAND, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY, MENDOTA, MERRILLVILLE, MINOOKA, MOROCCO, MORRIS, MUNDELEIN, NAPERVILLE, OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, OXFORD, PARK FOREST, PAXTON, PLANO, PONTIAC, PORTAGE, RENSSELAER, ROCHELLE, ROCKFORD, ROSELAWN, SCHAUMBURG, STREATOR, SYCAMORE, VALPARAISO, WATSEKA, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK, AND YORKVILLE. $$ LMZ740>745-100900- /O.NEW.KLOT.SV.A.0550.260810T0144Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 550 IN EFFECT UNTIL 4 AM CDT MONDAY FOR THE FOLLOWING AREAS THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS WINTHROP HARBOR TO WILMETTE HARBOR IL WILMETTE HARBOR TO NORTHERLY ISLAND IL NORTHERLY ISLAND TO CALUMET HARBOR IL CALUMET HARBOR IL TO GARY IN GARY TO BURNS HARBOR IN BURNS HARBOR TO MICHIGAN CITY IN $$ Action: New Issued At: 2026-08-09 20:44:34 877 WWUS63 KLOT 100144 WCNLOT WATCH COUNTY NOTIFICATION FOR WATCH 550 NATIONAL WEATHER SERVICE CHICAGO IL 844 PM CDT SUN AUG 9 2026 ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111- 141-197-201-INC007-073-089-111-127-100900- /O.NEW.KLOT.SV.A.0550.260810T0144Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 550 IN EFFECT UNTIL 4 AM CDT /5 AM EDT/ MONDAY FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 18 COUNTIES IN CENTRAL ILLINOIS LIVINGSTON IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN NORTH CENTRAL ILLINOIS BOONE DE KALB LA SALLE LEE OGLE WINNEBAGO IN NORTHEAST ILLINOIS COOK DUPAGE GRUNDY KANE KANKAKEE KENDALL LAKE IL MCHENRY WILL IN INDIANA THIS WATCH INCLUDES 5 COUNTIES IN NORTHWEST INDIANA BENTON JASPER LAKE IN NEWTON PORTER THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, BYRON, CAROL STREAM, CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DEMOTTE, DIXON, DOWNERS GROVE, DWIGHT, ELGIN, EVANSTON, FAIRBURY, FOWLER, GARY, GIBSON CITY, GILMAN, GURNEE, HAMMOND, JOLIET, KANKAKEE, KENTLAND, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY, MENDOTA, MERRILLVILLE, MINOOKA, MOROCCO, MORRIS, MUNDELEIN, NAPERVILLE, OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, OXFORD, PARK FOREST, PAXTON, PLANO, PONTIAC, PORTAGE, RENSSELAER, ROCHELLE, ROCKFORD, ROSELAWN, SCHAUMBURG, STREATOR, SYCAMORE, VALPARAISO, WATSEKA, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK, AND YORKVILLE. $$ LMZ740>745-100900- /O.NEW.KLOT.SV.A.0550.260810T0144Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 550 IN EFFECT UNTIL 4 AM CDT MONDAY FOR THE FOLLOWING AREAS THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS WINTHROP HARBOR TO WILMETTE HARBOR IL WILMETTE HARBOR TO NORTHERLY ISLAND IL NORTHERLY ISLAND TO CALUMET HARBOR IL CALUMET HARBOR IL TO GARY IN GARY TO BURNS HARBOR IN BURNS HARBOR TO MICHIGAN CITY IN $$ Action: Continued Issued At: 2026-08-10 02:23:43 079 WWUS63 KLOT 100723 WCNLOT WATCH COUNTY NOTIFICATION FOR WATCH 550 NATIONAL WEATHER SERVICE CHICAGO IL 223 AM CDT MON AUG 10 2026 ILC007-031-037-043-063-089-093-097-099-103-111-141-197-201-INC089- 127-100830- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS IN ILLINOIS THIS CANCELS 14 COUNTIES IN NORTH CENTRAL ILLINOIS BOONE DE KALB LA SALLE LEE OGLE WINNEBAGO IN NORTHEAST ILLINOIS COOK DUPAGE GRUNDY KANE KENDALL LAKE IL MCHENRY WILL IN INDIANA THIS CANCELS 2 COUNTIES IN NORTHWEST INDIANA LAKE IN PORTER THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BOLINGBROOK, BUFFALO GROVE, BYRON, CAROL STREAM, CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DIXON, DOWNERS GROVE, ELGIN, EVANSTON, GARY, GURNEE, HAMMOND, JOLIET, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY, MENDOTA, MERRILLVILLE, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE, OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, PARK FOREST, PLANO, PORTAGE, ROCHELLE, ROCKFORD, SCHAUMBURG, STREATOR, SYCAMORE, VALPARAISO, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK, AND YORKVILLE. $$ LMZ740>745-100830- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS THIS CANCELS THE FOLLOWING ADJACENT COASTAL WATERS WINTHROP HARBOR TO WILMETTE HARBOR IL WILMETTE HARBOR TO NORTHERLY ISLAND IL NORTHERLY ISLAND TO CALUMET HARBOR IL CALUMET HARBOR IL TO GARY IN GARY TO BURNS HARBOR IN BURNS HARBOR TO MICHIGAN CITY IN $$ ILC053-075-091-105-INC007-073-111-100900- /O.CON.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ SEVERE THUNDERSTORM WATCH 550 REMAINS VALID UNTIL 4 AM CDT /5 AM EDT/ EARLY THIS MORNING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 4 COUNTIES IN CENTRAL ILLINOIS LIVINGSTON IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN NORTHEAST ILLINOIS KANKAKEE IN INDIANA THIS WATCH INCLUDES 3 COUNTIES IN NORTHWEST INDIANA BENTON JASPER NEWTON THIS INCLUDES THE CITIES OF BOURBONNAIS, DEMOTTE, DWIGHT, FAIRBURY, FOWLER, GIBSON CITY, GILMAN, KANKAKEE, KENTLAND, MOROCCO, OXFORD, PAXTON, PONTIAC, RENSSELAER, ROSELAWN, AND WATSEKA. $$ Action: Cancelled Issued At: 2026-08-10 02:23:43 079 WWUS63 KLOT 100723 WCNLOT WATCH COUNTY NOTIFICATION FOR WATCH 550 NATIONAL WEATHER SERVICE CHICAGO IL 223 AM CDT MON AUG 10 2026 ILC007-031-037-043-063-089-093-097-099-103-111-141-197-201-INC089- 127-100830- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS IN ILLINOIS THIS CANCELS 14 COUNTIES IN NORTH CENTRAL ILLINOIS BOONE DE KALB LA SALLE LEE OGLE WINNEBAGO IN NORTHEAST ILLINOIS COOK DUPAGE GRUNDY KANE KENDALL LAKE IL MCHENRY WILL IN INDIANA THIS CANCELS 2 COUNTIES IN NORTHWEST INDIANA LAKE IN PORTER THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BOLINGBROOK, BUFFALO GROVE, BYRON, CAROL STREAM, CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DIXON, DOWNERS GROVE, ELGIN, EVANSTON, GARY, GURNEE, HAMMOND, JOLIET, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY, MENDOTA, MERRILLVILLE, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE, OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, PARK FOREST, PLANO, PORTAGE, ROCHELLE, ROCKFORD, SCHAUMBURG, STREATOR, SYCAMORE, VALPARAISO, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK, AND YORKVILLE. $$ LMZ740>745-100830- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS THIS CANCELS THE FOLLOWING ADJACENT COASTAL WATERS 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 $$ ILC053-075-091-105-INC007-073-111-100900- /O.CON.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ SEVERE THUNDERSTORM WATCH 550 REMAINS VALID UNTIL 4 AM CDT /5 AM EDT/ EARLY THIS MORNING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 4 COUNTIES IN CENTRAL ILLINOIS LIVINGSTON IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN NORTHEAST ILLINOIS KANKAKEE IN INDIANA THIS WATCH INCLUDES 3 COUNTIES IN NORTHWEST INDIANA BENTON JASPER NEWTON THIS INCLUDES THE CITIES OF BOURBONNAIS, DEMOTTE, DWIGHT, FAIRBURY, FOWLER, GIBSON CITY, GILMAN, KANKAKEE, KENTLAND, MOROCCO, OXFORD, PAXTON, PONTIAC, RENSSELAER, ROSELAWN, AND WATSEKA. $$ Action: Cancelled Issued At: 2026-08-10 02:23:43 079 WWUS63 KLOT 100723 WCNLOT WATCH COUNTY NOTIFICATION FOR WATCH 550 NATIONAL WEATHER SERVICE CHICAGO IL 223 AM CDT MON AUG 10 2026 ILC007-031-037-043-063-089-093-097-099-103-111-141-197-201-INC089- 127-100830- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS IN ILLINOIS THIS CANCELS 14 COUNTIES IN NORTH CENTRAL ILLINOIS BOONE DE KALB LA SALLE LEE OGLE WINNEBAGO IN NORTHEAST ILLINOIS COOK DUPAGE GRUNDY KANE KENDALL LAKE IL MCHENRY WILL IN INDIANA THIS CANCELS 2 COUNTIES IN NORTHWEST INDIANA LAKE IN PORTER THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BOLINGBROOK, BUFFALO GROVE, BYRON, CAROL STREAM, CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DIXON, DOWNERS GROVE, ELGIN, EVANSTON, GARY, GURNEE, HAMMOND, JOLIET, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY, MENDOTA, MERRILLVILLE, MINOOKA, MORRIS, MUNDELEIN, NAPERVILLE, OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, PARK FOREST, PLANO, PORTAGE, ROCHELLE, ROCKFORD, SCHAUMBURG, STREATOR, SYCAMORE, VALPARAISO, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK, AND YORKVILLE. $$ LMZ740>745-100830- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS THIS CANCELS THE FOLLOWING ADJACENT COASTAL WATERS WINTHROP HARBOR TO WILMETTE HARBOR IL WILMETTE HARBOR TO NORTHERLY ISLAND IL NORTHERLY ISLAND TO CALUMET HARBOR IL CALUMET HARBOR IL TO GARY IN GARY TO BURNS HARBOR IN BURNS HARBOR TO MICHIGAN CITY IN $$ ILC053-075-091-105-INC007-073-111-100900- /O.CON.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ SEVERE THUNDERSTORM WATCH 550 REMAINS VALID UNTIL 4 AM CDT /5 AM EDT/ EARLY THIS MORNING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 4 COUNTIES IN CENTRAL ILLINOIS LIVINGSTON IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN NORTHEAST ILLINOIS KANKAKEE IN INDIANA THIS WATCH INCLUDES 3 COUNTIES IN NORTHWEST INDIANA BENTON JASPER NEWTON THIS INCLUDES THE CITIES OF BOURBONNAIS, DEMOTTE, DWIGHT, FAIRBURY, FOWLER, GIBSON CITY, GILMAN, KANKAKEE, KENTLAND, MOROCCO, OXFORD, PAXTON, PONTIAC, RENSSELAER, ROSELAWN, AND WATSEKA. $$ Action: Continued Issued At: 2026-08-10 02:40:14 517 WWUS63 KLOT 100739 WCNLOT WATCH COUNTY NOTIFICATION FOR WATCH 550 NATIONAL WEATHER SERVICE CHICAGO IL 239 AM CDT MON AUG 10 2026 ILC091-105-100845- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS IN ILLINOIS THIS CANCELS 2 COUNTIES IN CENTRAL ILLINOIS LIVINGSTON IN NORTHEAST ILLINOIS KANKAKEE THIS INCLUDES THE CITIES OF BOURBONNAIS, DWIGHT, FAIRBURY, KANKAKEE, AND PONTIAC. $$ ILC053-075-INC007-073-111-100900- /O.CON.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ SEVERE THUNDERSTORM WATCH 550 REMAINS VALID UNTIL 4 AM CDT /5 AM EDT/ EARLY THIS MORNING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 2 COUNTIES IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN INDIANA THIS WATCH INCLUDES 3 COUNTIES IN NORTHWEST INDIANA BENTON JASPER NEWTON THIS INCLUDES THE CITIES OF DEMOTTE, FOWLER, GIBSON CITY, GILMAN, KENTLAND, MOROCCO, OXFORD, PAXTON, RENSSELAER, ROSELAWN, AND WATSEKA. $$ Action: Cancelled Issued At: 2026-08-10 02:40:14 517 WWUS63 KLOT 100739 WCNLOT WATCH COUNTY NOTIFICATION FOR WATCH 550 NATIONAL WEATHER SERVICE CHICAGO IL 239 AM CDT MON AUG 10 2026 ILC091-105-100845- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS IN ILLINOIS THIS CANCELS 2 COUNTIES IN CENTRAL ILLINOIS LIVINGSTON IN NORTHEAST ILLINOIS KANKAKEE THIS INCLUDES THE CITIES OF BOURBONNAIS, DWIGHT, FAIRBURY, KANKAKEE, AND PONTIAC. $$ ILC053-075-INC007-073-111-100900- /O.CON.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ SEVERE THUNDERSTORM WATCH 550 REMAINS VALID UNTIL 4 AM CDT /5 AM EDT/ EARLY THIS MORNING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 2 COUNTIES IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN INDIANA THIS WATCH INCLUDES 3 COUNTIES IN NORTHWEST INDIANA BENTON JASPER NEWTON THIS INCLUDES THE CITIES OF DEMOTTE, FOWLER, GIBSON CITY, GILMAN, KENTLAND, MOROCCO, OXFORD, PAXTON, RENSSELAER, ROSELAWN, AND WATSEKA. $$ Action: Cancelled Issued At: 2026-08-10 03:19:15 866 WWUS63 KLOT 100818 WCNLOT WATCH COUNTY NOTIFICATION FOR WATCH 550 NATIONAL WEATHER SERVICE CHICAGO IL 318 AM CDT MON AUG 10 2026 ILC053-075-INC007-073-111-100930- /O.CAN.KLOT.SV.A.0550.000000T0000Z-260810T0900Z/ THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH 550 FOR THE FOLLOWING AREAS IN ILLINOIS THIS CANCELS 2 COUNTIES IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN INDIANA THIS CANCELS 3 COUNTIES IN NORTHWEST INDIANA BENTON JASPER NEWTON THIS INCLUDES THE CITIES OF DEMOTTE, FOWLER, GIBSON CITY, GILMAN, KENTLAND, MOROCCO, OXFORD, PAXTON, RENSSELAER, ROSELAWN, AND WATSEKA. $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||