Headline:
Flood Warning issued July 27 at 7:56PM CDT until July 28 at 2:51PM CDT by NWS Chicago IL
Event:
Flood Warning
Urgency:
Expected
Effective:
July 27, 2026 - 5:56pm
Expires:
July 28, 2026 - 12:00pm
Description:
...The National Weather Service in Chicago IL has issued a Flood
Warning for the following rivers in Illinois...
Thorn Creek at Thornton affecting Cook County.
For the Thorn Creek...including Thornton...Minor flooding is
forecast.
* WHAT...Minor flooding is forecast.
* WHERE...Thorn Creek from Near Glenwood downstream to confluence
with Little Calumet River, including the Thornton gauge.
* WHEN...Until early Tuesday afternoon.
* IMPACTS...At 9.0 feet, Water begins to be diverted through Thorn
Creek Diversion Tunnel.
* ADDITIONAL DETAILS...
- At 7:45 PM CDT Monday the stage was 8.2 feet.
- Forecast...The river is expected to rise above flood stage
late this evening to a crest of 9.6 feet just after midnight
tonight. It will then fall below flood stage Tuesday morning.
- Flood stage is 9.0 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 Tuesday afternoon.
Area Description:
Cook, IL
Forcast Office:
NWS Chicago IL
Sender:
w-nws.webmaster@noaa.gov