Freeze Warning
Status
Event Continued ExpiredStart Time
Mon 04/20/2026 03:34 AM EDTEnd Time
Mon 04/20/2026 10:00 AM EDTSignificance
WarningImpacts
High impact
Locations Affected
Joliet, IL ∙ Rockford, IL ∙ Naperville, IL ∙ Aurora, IL ∙ Elgin, IL ∙ Waukegan, IL ∙ Gary, IN ∙ Hammond, IN ∙ Schaumburg, IL ∙ Palatine, ILFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Chicago IL 234 AM CDT Mon Apr 20 2026 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT /10 AM EDT/ THIS MORNING... * WHAT...Sub-freezing temperatures as low as 26 expected, with the coldest conditions across interior northern Illinois. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until 9 AM CDT /10 AM EDT/ this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold.
Technical Header
ILZ003>006-008-010>013-019>021-023-032-033-039-103-105>108-INZ001- 002-010-011-019-201400- /O.CON.KLOT.FZ.W.0001.000000T0000Z-260420T1400Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-Northern Cook-Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton- Including the cities of Downers Grove, Elgin, Plano, Roselawn, Chesterton, Gilman, Aurora, Buffalo Grove, DeKalb, Des Plaines, Marseilles, Coal City, DeMotte, Streator, Rockford, Evanston, Manhattan, Minooka, Gary, Oak Forest, Gurnee, Dwight, Crete, Lemont, Waukegan, Channahon, Carol Stream, Calumet City, Oxford, Belvidere, Oswego, Morris, Mokena, Orland Park, Wilmington, Woodstock, Pontiac, La Salle, Morocco, Hammond, Valparaiso, Kankakee, Watseka, Lombard, Byron, Northbrook, Gibson City, Sycamore, Merrillville, Naperville, Portage, Mendota, Beecher, Kentland, McHenry, Oregon, Yorkville, Bolingbrook, Paxton, Mundelein, Bourbonnais, Rensselaer, Joliet, Fairbury, Plainfield, Algonquin, Park Forest, Schaumburg, Rochelle, Wheaton, Crystal Lake, Bradley, Ottawa, Dixon, Peotone, Palatine, and Fowler 234 AM CDT Mon Apr 20 2026 /334 AM EDT Mon Apr 20 2026/
