Hazard Report Provided By forecast.weather.gov

Hydrologic Outlook
ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111-141-
197-201-INC007-073-089-111-127-160700-

Hydrologic Outlook
National Weather Service Chicago IL
311 PM CDT Mon Jun 15 2026

...Periods of heavy rain and thunderstorms may lead to instances of
flooding on Wednesday...

Periods of showers and thunderstorms are anticipated to move across
northern Illinois and northwest Indiana on Wednesday. Torrential
rainfall could lead to instances of flooding, especially in urban
areas or areas that recently saw flooding impacts or received heavy
rainfall.

Atmospheric conditions are very favorable for high rainfall rates in
excess of two inches per hour. Much of the area will be especially
susceptible to flooding given recent flood and heavy rain events.
Most of northern Illinois is favored to receive an inch or more of
rain through the end of Wednesday with pockets closer to two to three
inches possible. A number of area rivers and streams are currently
swollen as a result of recent rain.

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.

This product will be updated early Tuesday morning.
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Doom

Hazard Report Provided By forecast.weather.gov