Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
217 PM CDT Wed Jun 24 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-251930-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
217 PM CDT Wed Jun 24 2026 /317 PM EDT Wed Jun 24 2026/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Level 2 of 5 Damaging Wind Risk...up to 60 mph.
     Level 2 of 5 Large Hail Risk...up to ping pong ball size.

DISCUSSION...

Scattered thunderstorms are expected this afternoon and evening.
A couple of the storms could become severe with large hail and
damaging winds the primary threat.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Friday...
  Limited Thunderstorm Risk south of I-80.
Saturday night and Sunday morning...
  Limited Thunderstorm Risk.
Monday...
  Elevated Excessive Heat Risk.
Tuesday...
  Limited Thunderstorm Risk.
  Elevated Excessive Heat Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed through this evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the southeast 30 mph, isolated storms may move
  northeast up to 40 mph.

$$

Flood Warning
National Weather Service Chicago IL
1056 PM CDT Wed Jun 24 2026

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 Thursday afternoon.

&&

ILC031-INC089-252200-
/O.NEW.KLOT.FL.W.0048.260625T0356Z-260626T1200Z/
/LCMI3.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1056 PM CDT Wed Jun 24 2026

...FLOOD WARNING IN EFFECT FROM THIS EVENING TO FRIDAY MORNING...

* WHAT...Near flood stage water levels likely.

* 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...From this evening to Friday morning.

* IMPACTS...At 10.0 feet, Water overflows low-lying river banks
  outside of the levee-protected area in Hammond and Munster.
  At 12.5 feet, Most areas outside of the levee-protected area are
  inundated in Hammond and Munster.

* ADDITIONAL DETAILS...
  - At 10:00 PM CDT Wednesday the stage was 11.0 feet.
  - Forecast...The river is expected to near flood stage
    overnight tonight.
  - Flood stage is 12.0 feet.
  - http://www.weather.gov/safety/flood

&&

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


$$

WSL

Flood Warning
National Weather Service Chicago IL
1043 PM CDT Wed Jun 24 2026

ILC031-INC089-127-250930-
/O.NEW.KLOT.FA.W.0006.260625T0343Z-260625T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-Lake IN IN-Porter IN-
1043 PM CDT Wed Jun 24 2026

...FLOOD WARNING IN EFFECT UNTIL EARLY THURSDAY MORNING...
...REPLACES FLASH FLOOD WARNING AND FLOOD ADVISORY PREVIOUSLY IN
EFFECT...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Southern Cook County in northeast Illinois, northern Lake
  County and west central Porter County in northwest Indiana.

* WHEN...Until 430 AM CDT.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
  may occur in poor drainage and urban areas. Roads and streets may
  be flooded.

* ADDITIONAL DETAILS...
  - At 1040 PM CDT, stream gauge reports indicated rapid rises on
    area creeks due to earlier heavy rainfall. Multiple reports
    of roadway flooding have been received from southern Cook
    County into northern Lake County. Standing water on area
    roadways may be slow to recede into the overnight hours, and
    some creeks may continue to rise overnight.
  - Some locations that may continue to experience flooding
    include...
    Chicago, Hammond, Gary, Orland Park, Oak Lawn, Calumet City,
    Merrillville, Valparaiso, Chicago Heights, Schererville,
    Hobart, Lansing, Oak Forest, Crown Point, Harvey, Highland,
    Blue Island, Munster, Dolton and Homewood. This includes
    Thorn Creek, Hart Ditch, Turkey Creek, Deep River, and the
    Little Calumet River.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Warning means flooding is imminent or may already be
occurring. Persons along rivers, creeks, and other waterways should
take immediate precautions to protect life and property.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4162 8779 4165 8790 4169 8795 4172 8791
      4170 8775 4164 8761 4158 8753 4149 8703
      4145 8704 4138 8721 4141 8737 4147 8753
      4148 8763 4157 8771


$$

WSL

Hazard Report Provided By forecast.weather.gov