Severe Thunderstorm Watch

Full Alert Message

WATCH COUNTY NOTIFICATION FOR WATCH 599 NATIONAL WEATHER SERVICE CHICAGO IL 1223 PM CDT MON AUG 18 2025 The National Weather Service has issued severe thunderstorm watch 599 in effect until 6 PM CDT this evening for the following areas in illinois this watch includes 14 counties in north central illinois boone de kalb la salle lee ogle winnebago in northeast illinois cook dupage grundy kane kendall lake il mchenry will this includes the cities of algonquin, aurora, belvidere, bolingbrook, buffalo grove, byron, carol stream, chicago, coal city, crystal lake, dekalb, dixon, downers grove, elgin, evanston, gurnee, joliet, la salle, lemont, lombard, marseilles, mchenry, mendota, minooka, morris, mundelein, naperville, oak lawn, oregon, orland park, oswego, ottawa, park forest, plano, rochelle, rockford, schaumburg, streator, sycamore, waukegan, wheaton, wilmington, woodstock, and yorkville.