One product issued by NWS for:
Hazardous Weather Outlook
Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 355 AM CDT Wed Sep 16 2026 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-170900- Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage- La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford- Northern Cook-Central Cook-Southern Cook-Northern Will- Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton- 355 AM CDT Wed Sep 16 2026 /455 AM EDT Wed Sep 16 2026/ This Hazardous Weather Outlook is for portions of north central Illinois...northeast Illinois and northwest Indiana. .DAY ONE...Today and Tonight. Weather hazards expected... Limited Thunderstorm Risk. Elevated Flooding Risk Tonight. DISCUSSION... A few isolated thunderstorms are possible today south of I-80. However, there is a better chance for another wave of thunderstorms later tonight into early Thursday morning. Very heavy rainfall will likely accompany these storms, and the potential for repeated thunderstorms moving over the same areas may lead to localized flooding, particularly to the south of I-80. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Thursday morning... Limited Thunderstorm Risk. Limited Flooding Risk. Friday night through Sunday... Limited Thunderstorm Risk. Limited to Elevated Flooding Risk. High Swim Risk Lake Michigan Beaches. Monday... Limited Thunderstorm Risk. DISCUSSION... Additional episodes of showers and storms are expected in the general area this weekend. Repeated downpours may lead to localized flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be necessary through tonight. GENERAL STORM MOTION OF THE DAY: Moving toward the east southeast around 35 mph $$