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Radar valid at 806 am CDT, Jun 30th 2026

alert legend

ILZ003>006-008-010>013-019>021-023-032-033-039-106>108-INZ001-002-
010-011-019-281800-
/O.NEW.KLOT.HT.Y.0001.260629T1700Z-260702T0300Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La
Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern
Will-Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-
Benton-
Including the cities of Bradley, Portage, La Salle, Minooka,
Hammond, Merrillville, Sycamore, Coal City, Kentland, Fowler,
Mundelein, Crystal Lake, Carol Stream, Fairbury, Dwight,
Woodstock, Belvidere, Joliet, Mokena, Elgin, Morris, Gary,
Paxton, Valparaiso, Lombard, Watseka, Chesterton, Waukegan,
Gilman, Oxford, DeMotte, Oregon, Dixon, Naperville, Buffalo
Grove, DeKalb, Plainfield, Byron, Rochelle, Crete, Wilmington,
Roselawn, Morocco, Bourbonnais, Gurnee, Yorkville, Ottawa,
Marseilles, Wheaton, Plano, Beecher, Downers Grove, Oswego,
Aurora, Mendota, Pontiac, Gibson City, Peotone, Rensselaer,
Rockford, McHenry, Kankakee, Algonquin, Channahon, Bolingbrook,
Streator, and Manhattan
247 AM CDT Sun Jun 28 2026 /347 AM EDT Sun Jun 28 2026/

...HEAT ADVISORY IN EFFECT FROM NOON CDT /1 PM EDT/ MONDAY TO 10 PM
CDT /11 PM EDT/ WEDNESDAY...

* WHAT...Heat index values around 105 expected each afternoon.

* WHERE...Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

* WHEN...From noon CDT /1 PM EDT/ Monday to 10 PM CDT /11 PM EDT/
Wednesday.

* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

iNWS is an experimental service intended for NWS core partners, including emergency managers, community leaders and other government agencies only.