


Flood Potential Outlook
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
Versions:
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349 FGUS73 KLOT 101954 ESFLOT ILC007-031-037-043-063-089-093-097-099-103-111-141-197-201-INC089- 127-110200- Hydrologic Outlook National Weather Service Chicago IL 254 PM CDT Thu Jul 10 2025 ...Torrential rain producing storms may lead to instances of localized flooding tonight and on Friday... Waves of showers and thunderstorms are expected to move across portions of northern Illinois and possibly far northwest Indiana tonight. Heavy rainfall rates of up to two inches per hour will be possible with these storms as they shift eastward. Rainfall amounts of this magnitude may cause instances of flash flooding, along with significant rises on area streams and rivers, some of which could reach or exceed flood stage. This outlook means that elevated water levels and potential impacts are possible, but not yet certain, particularly for areas near and north of I-80. Persons with interests along area streams and rivers should closely monitor the latest forecasts. A Flood Watch may be needed if confidence continues to increase in which areas of northern IL have the highest threat of repeated instances of heavy rainfall tonight and on Friday. $$