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Flood Warning — Cook County, IL, Lake County, IN
Flood Warning
Issued
4:00 PM CDT · Mon, Jul 27 2026
Expires
1:00 PM CDT · Tue, Jul 28 2026
Issuing Office
NWS KLOT

Affected Areas

Cook County, IL Lake County, IN

Official Bulletin

041
WGUS43 KLOT 272009
FLWLOT

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Chicago IL
309 PM CDT Mon Jul 27 2026

...The National Weather Service in Chicago IL has issued a Flood
Warning for the following rivers in Illinois...Indiana...

  Little Calumet River at Munster (Hohman Avenue) affecting Cook
  and Lake IN Counties.

For the Little Calumet River...including Munster (Hohman Avenue)...
Minor flooding is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 morning.

&&

ILC031-INC089-281415-
/O.NEW.KLOT.FL.W.0061.260727T2100Z-260728T1800Z/
/LCMI3.1.ER.260727T2300Z.260728T0300Z.000000T0000Z.NO/
309 PM CDT Mon Jul 27 2026

...FLOOD WARNING IN EFFECT UNTIL EARLY TOMORROW AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...Little Calumet River from IN-912 in Hammond downstream to
  confluence with Thorn Creek in South Holland, including the
  Munster (Hohman Avenue) gauge.

* WHEN...Until early tomorrow afternoon.

* IMPACTS...At 12.5 feet, Most areas outside of the levee-protected
  area are inundated in Hammond and Munster.

* ADDITIONAL DETAILS...
  - At 2:00 PM CDT Monday the stage was 9.3 feet.
  - The river has begun rising quickly due to earlier heavy
    rainfall.
  - Forecast...The river is expected to rise above flood stage by
    this evening and crest near 12.5 feet late this evening.
  - Flood stage is 12.0 feet.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4163 8756 4159 8740 4153 8743 4157 8758

$$

WSL