805
WWUS73 KLOT 041444
NPWLOT
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
944 AM CDT FRI SEP 4 2026
ILZ006-041545-
/O.CAN.KLOT.HT.Y.0007.000000T0000Z-260905T0300Z/
LAKE IL-
INCLUDING THE CITIES OF MUNDELEIN, BUFFALO GROVE, WAUKEGAN, AND
GURNEE
944 AM CDT FRI SEP 4 2026
..HEAT ADVISORY IS CANCELLED
THUNDERSTORM OUTFLOW HAS PRODUCED COOLER ONSHORE FLOW THIS MORNING.
WHILE CONDITIONS WILL TURN MUCH WARMER AND HUMID THIS AFTERNOON, PEAK
HEAT INDICES ARE LIKELY TO PEAK BELOW 100 DEGREES.
ILZ003>005-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-050045-
/O.CON.KLOT.HT.Y.0007.000000T0000Z-260905T0300Z/
WINNEBAGO-BOONE-MCHENRY-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-
INCLUDING THE CITIES OF VALPARAISO, NORTHBROOK, HAMMOND, OXFORD,
WOODSTOCK, LA SALLE, MOKENA, EVANSTON, LA GRANGE, CAROL STREAM, OAK
LAWN, OTTAWA, GILMAN, DES PLAINES, RENSSELAER, CALUMET CITY,
ROSELAWN, PONTIAC, CRYSTAL LAKE, BEECHER, BYRON, PLAINFIELD,
MARSEILLES, YORKVILLE, JOLIET, BOURBONNAIS, PALATINE, PARK FOREST,
MCHENRY, OAK FOREST, MORRIS, DWIGHT, NAPERVILLE, KANKAKEE, ORLAND
PARK, ROCHELLE, LOMBARD, PAXTON, KENTLAND, DEKALB, GIBSON CITY,
OREGON, CHANNAHON, MINOOKA, MANHATTAN, SCHAUMBURG, CHICAGO, BRADLEY,
CRETE, LEMONT, WATSEKA, SYCAMORE, CICERO, ALGONQUIN, DOWNERS GROVE,
WILMINGTON, COAL CITY, AURORA, FAIRBURY, DIXON, WHEATON, PLANO,
MENDOTA, BELVIDERE, GARY, FOWLER, OAK PARK, PEOTONE, DEMOTTE,
ROCKFORD, STREATOR, PORTAGE, BOLINGBROOK, MERRILLVILLE, OSWEGO,
ELGIN, MOROCCO, AND CHESTERTON
944 AM CDT FRI SEP 4 2026 /1044 AM EDT FRI SEP 4 2026/
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT /11 PM EDT/ THIS
EVENING...
* WHAT...PEAK HEAT INDEX VALUES THIS AFTERNOON OF 100 TO LOCALLY 110
DEGREES.
* WHERE...PORTIONS OF CENTRAL, EAST CENTRAL, NORTH CENTRAL, AND
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
* WHEN...UNTIL 10 PM CDT /11 PM EDT/ THIS EVENING.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES ESPECIALLY AFTER SEVERAL DAYS OF DANGEROUS HEAT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
CONSIDER ALTERING OUTDOOR PLANS. IF OUTDOORS FOR PROLONGED PERIODS OF
TIME, WEAR LIGHTWEIGHT AND LOOSE FITTING CLOTHING. TAKE ACTION WHEN
YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE.
BIRK
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