Areas of rain and thunderstorms are forecast Monday across the central and eastern states. Some mixed rain and snow is possible in the high Sierra Mountains. Heavy to excessive rain may bring flooding in the central Appalachians. Read More >
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| 140 FLUS43 KLOT 210246 HWOLOT Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 946 PM CDT Sun Sep 20 2026 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-220300- 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- 946 PM CDT Sun Sep 20 2026 /1046 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... High Swim Risk Lake Michigan Beaches. DISCUSSION... High waves will lead to dangerous swimming conditions at Lake Michigan beaches tonight. .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 southern Lake Michigan beaches through the middle of this week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be necessary through tonight. $$ LMZ740>745-220300- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 946 PM CDT Sun Sep 20 2026 This Hazardous Weather Outlook is for portions of the Illinois nearshore waters of Lake Michigan and the Indiana nearshore waters of Lake Michigan. .DAY ONE...Tonight. Weather hazards expected... Hazardous conditions for small craft. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Monday through Wednesday... Hazardous conditions for small craft are likely. $$ Ogorek Visit us at www.weather.gov/chicago |
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