Freeze Warning
Status
Event Continued Active alertStart Time
Mon 04/20/2026 01:00 AM EDTEnd Time
Mon 04/20/2026 10:00 AM EDTSignificance
WarningImpacts
High impact
Full Alert Message
URGENT - WEATHER MESSAGE National Weather Service Chicago IL 844 AM CDT Sun Apr 19 2026 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT CDT /1 AM EDT/ TONIGHT TO 9 AM CDT /10 AM EDT/ MONDAY... ...FROST ADVISORY WILL EXPIRE AT 9 AM CDT /10 AM EDT/ THIS MORNING... * WHAT...Sub-freezing temperatures as low as 27 expected, with the coldest conditions across interior northern Illinois. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From midnight CDT /1 AM EDT/ tonight to 9 AM CDT /10 AM EDT/ Monday. * 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>021-023-032-033-039-106>108-INZ001-002- 010-011-019-200000- /O.EXP.KLOT.FR.Y.0001.000000T0000Z-260419T1400Z/ /O.CON.KLOT.FZ.W.0001.260420T0500Z-260420T1400Z/ 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 McHenry, Dwight, Valparaiso, Naperville, Channahon, DeMotte, Aurora, Rochelle, Lombard, Crystal Lake, La Salle, Kankakee, Dixon, Bradley, Watseka, Oxford, Bourbonnais, Merrillville, Mendota, Hammond, Manhattan, Wilmington, Beecher, Minooka, Sycamore, Portage, Pontiac, Kentland, Marseilles, DeKalb, Wheaton, Coal City, Downers Grove, Waukegan, Fairbury, Gibson City, Belvidere, Ottawa, Joliet, Gurnee, Byron, Bolingbrook, Plainfield, Woodstock, Gilman, Rockford, Algonquin, Plano, Yorkville, Peotone, Carol Stream, Crete, Rensselaer, Morocco, Chesterton, Mokena, Buffalo Grove, Mundelein, Roselawn, Oregon, Streator, Paxton, Fowler, Oswego, Gary, Morris, and Elgin 844 AM CDT Sun Apr 19 2026 /944 AM EDT Sun Apr 19 2026/
