Headline:
Flood Warning issued April 20 at 11:36AM CDT by NWS Chicago IL
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 20, 2026 - 9:36am
Expires:
April 21, 2026 - 3:45am
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...Illinois River from Starved Rock Lock and Dam downstream
to confluence with Big Bureau Creek, including the La Salle gauge.
* WHEN...Until further notice.
* IMPACTS...At 22.0 feet, Lower parking lot at Starved Rock State
Park is inundated east of La Salle. High water levels begin to
impact shipping interests along the river.
* ADDITIONAL DETAILS...
- At 10:45 AM CDT Monday the stage was 21.3 feet.
- Recent Activity...The river is currently cresting and has
begun a slow fall.
- Forecast...The river is expected to slowly fall the next
several days.
- Flood stage is 20.0 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:
Bureau, IL; La Salle, IL; Putnam, IL
Forcast Office:
NWS Chicago IL
Sender:
w-nws.webmaster@noaa.gov