Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
146 PM CDT Sat Apr 18 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-191900-
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-
146 PM CDT Sat Apr 18 2026 /246 PM EDT Sat Apr 18 2026/

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

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

 Elevated Frost Risk overnight.

DISCUSSION...

Locally sub-freezing temperatures are possible tonight in outlying
areas, with many locations outside of the urban corridor dropping
into the low to mid 30s. Sheltered areas will be susceptible to
frost formation.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday Night...
 Significant Frost and Freeze Risk.
Friday...
 Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

$$

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
129 PM CDT Sat Apr 18 2026

ILZ103-105-190430-
/O.NEW.KLOT.FZ.A.0001.260420T0500Z-260420T1400Z/
Northern Cook-Southern Cook-
Including the cities of Park Forest, Lemont, Orland Park,
Evanston, Schaumburg, Des Plaines, Oak Forest, Palatine, Calumet
City, and Northbrook
129 PM CDT Sat Apr 18 2026

...FREEZE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY
MORNING...

* WHAT...Sub-freezing temperatures as low as 30 possible.

* WHERE...Northern Cook and Southern Cook Counties.

* WHEN...From late Sunday night through Monday morning.

* IMPACTS...Frost and freeze conditions could kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Donofrio

Flood Statement
National Weather Service Chicago IL
1238 PM CDT Sat Apr 18 2026

...The Flood Warning continues for the following rivers in
Illinois...

  Des Plaines River at Riverside affecting Cook County.

For the Des Plaines River...including Riverside...Minor flooding is
forecasted to occur.

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.

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 Sunday morning.

&&

ILC031-191145-
/O.EXT.KLOT.FL.W.0030.260419T0600Z-260420T0600Z/
/RVRI2.1.ER.260419T0600Z.260419T0600Z.260420T0000Z.NO/
1238 PM CDT Sat Apr 18 2026

...FLOOD WARNING NOW IN EFFECT FROM LATE TONIGHT TO EARLY MONDAY
MORNING...

* WHAT...Minor flooding is forecasted.

* WHERE...Des Plaines River from Roosevelt Road in Forest Park
  downstream to Hodgkins, including the Riverside gauge.

* WHEN...From late tonight to early Monday morning.

* IMPACTS...At 7.5 feet, Low-lying sections of Miller Meadow, Indian
  Gardens, Cermak Woods, Ottawa Trail Woods, and other forest land
  along the river are inundated.

* ADDITIONAL DETAILS...
  - At 11:45 AM CDT Saturday the stage was 7.1 feet.
  - Forecast...The river is expected to rise to a crest near
    flood stage tonight and into tomorrow. It is then expected to
    fall early next week.
  - Flood stage is 7.5 feet.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4186 8787 4187 8777 4183 8776 4174 8780
      4178 8791 4184 8786


$$

Borchardt

Flood Warning
National Weather Service Chicago IL
1216 PM CDT Sat Apr 18 2026

...Forecast flooding changed from Minor to Moderate severity for the
following rivers in Illinois...

  Des Plaines River near Des Plaines affecting Cook County.

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.

These forecasts are based almost entirely on observed precipitation
as little to no additional precipitation is currently expected over
the next 24 to 48 hours.

Additional information is available at www.weather.gov.

The next statement will be issued by Sunday morning.

&&

ILC031-191130-
/O.CON.KLOT.FL.W.0019.000000T0000Z-000000T0000Z/
/DSPI2.2.ER.260415T1630Z.260420T0000Z.000000T0000Z.NO/
1216 PM CDT Sat Apr 18 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring and moderate flooding is
  forecast.

* WHERE...Des Plaines River from Palatine Road in Prospect Heights
  downstream to Irving Park Road in Chicago, including the Des
  Plaines gauge.

* WHEN...Until further notice.

* IMPACTS...At 18.5 feet, Big Bend Road threatened in Des Plaines.

* ADDITIONAL DETAILS...
  - At 11:45 AM CDT Saturday the stage was 17.3 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 11:45 AM CDT Saturday was 17.3 feet. The river has
    been climbing due to rainfall yesterday evening.
  - Forecast...The river is expected to crest near 18.0 feet
    tomorrow.
  - Flood stage is 15.0 feet.
  - Flood History...This crest compares to a previous crest of
    17.9 feet on 09/14/2019.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4212 8794 4212 8784 4197 8780 4196 8790


$$

WSL

Flood Statement
National Weather Service Chicago IL
1216 PM CDT Sat Apr 18 2026

...The Flood Warning continues for the following rivers in
Illinois...

  Des Plaines River at Lincolnshire affecting Cook and Lake IL
  Counties.

  Des Plaines River near Russell affecting Lake IL County.

...The Flood Warning is extended for the following rivers in
Illinois...

  Des Plaines River near Gurnee affecting Lake IL County.

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.

These forecasts are based almost entirely on observed precipitation
as little to no additional precipitation is currently expected over
the next 24 to 48 hours.

Additional information is available at www.weather.gov.

The next statement will be issued by Sunday morning.

&&

ILC031-097-191130-
/O.EXT.KLOT.FL.W.0020.000000T0000Z-260423T1200Z/
/LDRI2.3.ER.260416T0400Z.260420T0000Z.260423T0600Z.NO/
1216 PM CDT Sat Apr 18 2026

...FLOOD WARNING NOW IN EFFECT UNTIL THURSDAY MORNING...

* WHAT...Moderate flooding is occurring and major flooding is
  forecast.

* WHERE...Des Plaines River from Townline Road in Libertyville
  downstream to Palatine Road in Prospect Heights, including the
  Lincolnshire gauge.

* WHEN...Until Thursday morning.

* IMPACTS...At 16.0 feet, Numerous structures threatened along US-45
  (Milwaukee Avenue) between IL-22 (Half Day Road) and Deerfield
  Road. Access route threatened for numerous residences near US-45
  (Milwaukee Avenue) and Deerfield Road. IL-60 (Townline Road)
  threatened near the river.

* ADDITIONAL DETAILS...
  - At 11:45 AM CDT Saturday the stage was 14.8 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 11:45 AM CDT Saturday was 14.8 feet. The river has
    been climbing due to rainfall yesterday evening.
  - Forecast...The river is expected to rise to a crest near 15.8
    feet tomorrow.
  - Flood stage is 12.5 feet.
  - Flood History...This crest compares to a previous crest of
    15.8 feet on 05/18/2020.
  - http://www.weather.gov/safety/flood

&&

LAT...LON 4224 8797 4224 8788 4212 8784 4212 8794


$$

Hazard Report Provided By forecast.weather.gov