Headline:
Flood Warning issued April 20 at 11:36AM CDT until April 21 at 4:00AM CDT by NWS Chicago IL
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 20, 2026 - 9:36am
Expires:
April 21, 2026 - 2:00am
Description:
...The Flood Warning is extended for the following rivers in
Illinois...
Kishwaukee River near Perryville affecting Winnebago County.
...The Flood Warning continues for the following rivers in
Illinois...
Rock River at Byron affecting Ogle County.
Illinois River at La Salle affecting La Salle, Bureau and Putnam
Counties.
Pecatonica River near Shirland affecting Winnebago County.
Rock River at Rockton affecting Winnebago County.
Rock River at Latham Park affecting Winnebago County.
Fox River at Montgomery affecting Kendall and Kane Counties.
Des Plaines River at Lincolnshire affecting Cook and Lake IL
Counties.
Des Plaines River near Russell affecting Lake IL County.
Des Plaines River near Gurnee affecting Lake IL County.
...Observed flooding changed to Minor severity for the following
rivers in Illinois...
Rock River at Dixon affecting Lee and Ogle Counties.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Kishwaukee River from Confluence with South Branch
Kishwaukee River downstream to the Rock River, including the
Perryville gauge.
* WHEN...Until late tonight.
* IMPACTS...At 12.0 feet, Water overtops low-lying banks in
Blackhawk Springs Forest Preserve and in south Rockford near
Chicago Rockford International Airport. Trails threatened at
Blackhawk Springs Forest Preserve.
* ADDITIONAL DETAILS...
- At 10:30 AM CDT Monday the stage was 12.2 feet.
- Recent Activity...The river stage has been falling since
yesterday.
- Forecast...The river is expected to fall below flood stage
this evening.
- Flood stage is 12.0 feet.
- http://www.weather.gov/safety/flood
Instruction:
A Flood Warning means water levels above flood stage are imminent or
may already be occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.
These forecasts are based on observed precipitation as well as
forecast precipitation 24 hours into the future. Changes to the
rainfall forecast, or any additional rainfall after 24 hours, may
cause changes to these river forecasts.
Additional information is available at www.weather.gov.
The next statement will be issued by this evening.
Area Description:
Winnebago, IL
Forcast Office:
NWS Chicago IL
Sender:
w-nws.webmaster@noaa.gov