Flood Potential Outlook
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
757 FGUS73 KLOT 291948 ESFLOT ILC007-031-037-043-063-089-093-097-099-103-111-141-197-201-INC089- 127-300900- Hydrologic Outlook National Weather Service Chicago IL 248 PM CDT Tue Sep 29 2026 ...Areas of flooding and rises in river levels possible mid to late this week... Several waves of rain, and possibly a few thunderstorms, are likely starting early Wednesday morning and persisting through Thursday night. High moisture content in the atmosphere will lead to periods of torrential downpours, and the threat for 1 to 3 inches of rainfall on a widespread basis through Thursday night. Repeated rounds of rain over saturated soils may lead to areas of flooding and rises in river levels, including along the Rock, Fox, DuPage, and Illinois rivers. This outlook means that elevated water levels and potential impacts are possible, but not yet certain. Persons should closely monitor forecasts including the possibility of flood watches, warnings, and advisories. Additional statements or outlooks may be issued by tomorrow morning. $$ Birk