FLUS43 KLOT 230833 HWOLOT Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 333 AM CDT Sun Aug 23 2026 ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002- 010-011-019-240845- 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- 333 AM CDT Sun Aug 23 2026 /433 AM EDT Sun Aug 23 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... High Swim Risk Lake Michigan Beaches. DISCUSSION... Dangerous swimming conditions will continue at Porter and Lake, IN County beaches through this evening and will likely build into Cook County later this morning and afternoon. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Wednesday... Limited Thunderstorm Risk. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be necessary through tonight. $$ LMZ740>745-240845- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 333 AM CDT Sun Aug 23 2026 This Hazardous Weather Outlook is for portions of the Illinois nearshore waters of Lake Michigan and the Indiana nearshore waters of Lake Michigan. .DAY ONE...Today and Tonight. Weather hazards expected... Hazardous conditions for small craft. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Wednesday... Limited Thunderstorm Risk. $$ Yack Visit us at www.weather.gov/chicago