210
WWUS73 KLOT 041648
NPWLOT
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
1148 AM CDT FRI SEP 4 2026
ILZ004-005-103-104-041800-
/O.CAN.KLOT.HT.Y.0007.000000T0000Z-260905T0300Z/
BOONE-MCHENRY-NORTHERN COOK-CENTRAL COOK-
INCLUDING THE CITIES OF OAK PARK, CHICAGO, PALATINE, CICERO,
EVANSTON, DES PLAINES, NORTHBROOK, LA GRANGE, ALGONQUIN, OAK LAWN,
SCHAUMBURG, MCHENRY, CRYSTAL LAKE, BELVIDERE, AND WOODSTOCK
1148 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 THROUGH THE
AFTERNOON, PEAK HEAT INDICES ARE LIKELY TO PEAK BELOW 100 DEGREES.
ILZ003-008-010>013-019>021-023-032-033-039-105>108-INZ001-002-010-
011-019-050300-
/O.CON.KLOT.HT.Y.0007.000000T0000Z-260905T0300Z/
WINNEBAGO-OGLE-LEE-DE KALB-KANE-DUPAGE-LA SALLE-KENDALL-GRUNDY-
KANKAKEE-LIVINGSTON-IROQUOIS-FORD-SOUTHERN COOK-NORTHERN WILL-
SOUTHERN WILL-EASTERN WILL-LAKE IN-PORTER-NEWTON-JASPER-BENTON-
INCLUDING THE CITIES OF MINOOKA, VALPARAISO, FAIRBURY, PLAINFIELD,
MANHATTAN, HAMMOND, DIXON, MARSEILLES, WHEATON, YORKVILLE, PLANO,
MENDOTA, JOLIET, OXFORD, BOURBONNAIS, BRADLEY, LA SALLE, MOKENA,
CRETE, LEMONT, GARY, FOWLER, CAROL STREAM, WATSEKA, BEECHER, PARK
FOREST, OAK FOREST, SYCAMORE, OTTAWA, GILMAN, CHESTERTON, MORRIS,
DWIGHT, PEOTONE, NAPERVILLE, KANKAKEE, DOWNERS GROVE, ORLAND PARK,
RENSSELAER, ROCKFORD, DEMOTTE, ROCHELLE, STREATOR, LOMBARD, PORTAGE,
CALUMET CITY, BOLINGBROOK, PAXTON, MERRILLVILLE, KENTLAND, OSWEGO,
ROSELAWN, PONTIAC, DEKALB, GIBSON CITY, ELGIN, MOROCCO, OREGON,
WILMINGTON, COAL CITY, AURORA, BYRON, AND CHANNAHON
1148 AM CDT FRI SEP 4 2026 /1248 PM 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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