Headline:
Flood Warning issued April 21 at 11:32AM CDT by NWS Chicago IL
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 21, 2026 - 9:32am
Expires:
April 22, 2026 - 3:45am
Description:
...The Flood Warning continues for the following rivers in
Illinois...
Fox River at Montgomery affecting Kendall and Kane Counties.
Fox River at Algonquin Lock & Dam tailwater affecting Lake IL,
Kane and McHenry Counties.
For the Fox River (Illinois)...including Montgomery, Algonquin Lock
& Dam tailwater...Major flooding is forecast.
* WHAT...Moderate flooding is occurring and major flooding is
forecast.
* WHERE...Fox River from Johnsburg downstream to Red Gate Road in
St. Charles, including the Algonquin Lock & Dam tailwater gauge.
* WHEN...Until further notice.
* IMPACTS...At 11.5 feet, Residences threatened along Oceola Drive
in Algonquin. A few residences threatened along McBridge Street in
Elgin. Jayne Street and Beach Drive threatened in Algonquin. River
Street threatened in East Dundee. Jerusha Avenue threatened in
Elgin. Fox River Trail threatened between East Dundee and Elgin.
At 12.0 feet, Structures threatened along River Street, Johnson
Street, and Maiden Lane in East Dundee. North Harrison Street
threatened near Riverside Park in Algonquin. Washington Street
threatened in Carpentersville. Water Street, Edwards Avenue, and
Elgin Avenue threatened in East Dundee. Bayview Road threatened in
Elgin. Low-lying areas of Festival Park are threatened in Elgin.
* ADDITIONAL DETAILS...
- At 10:30 AM CDT Tuesday the stage was 11.8 feet.
- Recent Activity...The river stage continues to gradually
rise.
- Forecast...The river is expected to gradually rise and reach
Major flood stage late this week.
- Flood stage is 9.5 feet.
- Flood History...This crest compares to a previous crest of
11.8 feet on 05/23/2020.
- http://www.weather.gov/safety/flood
Instruction:
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.
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.
Additional information is available at www.weather.gov.
The next statement will be issued by late tonight.
Area Description:
Kane, IL; Lake, IL; McHenry, IL
Forcast Office:
NWS Chicago IL
Sender:
w-nws.webmaster@noaa.gov