Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley today. Heat Advisories remain in effect. Heavy to excessive rainfall today could bring areas of flooding to parts of the northern High Plains and Midwest into the Ohio Valley. Flood Watches remain in effect. Read More >
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| 835 FLUS43 KLOT 201950 HWOLOT Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 250 PM CDT Sun Sep 20 2026 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-212000- 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- 250 PM CDT Sun Sep 20 2026 /350 PM EDT Sun Sep 20 2026/ This Hazardous Weather Outlook is for portions of north central Illinois...northeast Illinois and northwest Indiana. .DAY ONE...Tonight. Weather hazards expected... Limited Thunderstorm Risk. High Swim Risk Lake Michigan Beaches. DISCUSSION... Showers and drizzle will continue across northern Illinois and northwest Indiana through early evening. An isolated lightning strike or two cannot be ruled out near and south of US-24. High waves will lead to dangerous swimming conditions at Lake Michigan beaches. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Monday through Wednesday... High Swim Risk Lake Michigan Beaches. DISCUSSION... Persistent northeast winds will maintain high waves and dangerous swimming conditions at Lake Michigan beaches through the middle of this week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be necessary through tonight. GENERAL STORM MOTION OF THE DAY: Moving toward the east at 25 to 35 mph. $$ LMZ740>745-212000- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 250 PM CDT Sun Sep 20 2026 This Hazardous Weather Outlook is for portions of the Illinois nearshore waters of Lake Michigan and the Indiana nearshore waters of Lake Michigan. .DAY ONE...Tonight. Weather hazards expected... Hazardous conditions for small craft. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Monday through Wednesday... Hazardous conditions for small craft are likely. $$ Yack Visit us at www.weather.gov/chicago |
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