747 
WGUS83 KLOT 111536
FLSLOT

Flood Advisory
National Weather Service Chicago IL
1036 AM CDT Tue Aug 11 2026

ILC031-043-091-197-111830-
/O.NEW.KLOT.FA.Y.0100.260811T1536Z-260811T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-DuPage IL-Kankakee IL-Will IL-
1036 AM CDT Tue Aug 11 2026

...FLOOD ADVISORY IN EFFECT UNTIL 130 PM CDT THIS AFTERNOON...

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

* WHERE...Cook County in northeastern Illinois...
  DuPage County in northeastern Illinois...
  Northeastern Kankakee County in northeastern Illinois...
  Will County in northeastern Illinois...

* WHEN...Until 130 PM 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 1035 AM CDT, Doppler radar and automated rain gauges indicated
    a line of intense thunderstorms with rainfall rates of 2 to 3
    inches per hour moving through the area. Localized flooding of
    roadways and poor drainage areas will occur shortly after the
    onset of rainfall.
  - Some locations that will experience flooding include...
    Chicago, Aurora, Joliet, Naperville, Elgin, Cicero, Arlington
    Heights, Evanston, Schaumburg, Bolingbrook, Skokie, Des Plaines,
    Orland Park, Tinley Park, Oak Lawn, Berwyn, Mount Prospect,
    Wheaton and Hoffman Estates.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.

&&

LAT...LON 4207 8826 4206 8766 4203 8766 4199 8765
      4197 8763 4195 8763 4193 8762 4190 8759
      4188 8759 4188 8761 4185 8760 4177 8755
      4175 8753 4173 8752 4129 8753 4129 8825


$$

WSL

351 
WGUS83 KLOT 111704
FLSLOT

Flood Advisory
National Weather Service Chicago IL
1204 PM CDT Tue Aug 11 2026

ILC031-043-091-197-111830-
/O.CON.KLOT.FA.Y.0100.000000T0000Z-260811T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-DuPage IL-Kankakee IL-Will IL-
1204 PM CDT Tue Aug 11 2026

...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 130 PM CDT THIS
AFTERNOON...

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Southeastern Cook County in northeastern Illinois...
  Southern DuPage County in northeastern Illinois...
  Northeastern Kankakee County in northeastern Illinois...
  Will County in northeastern Illinois...

* WHEN...Until 130 PM 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 1202 PM CDT, Doppler radar and automated rain gauges indicated
    up to 2.0 inches of rain occurred due to earlier thunderstorms.
    Heavy rainfall has moved out of the area, but some standing water
    may be slow to recede over the next few hours. A few streams may
    continue to rise as runoff moves downstream.
  - Flooding impacts will continue, but no additional rainfall is
    expected.
  - Some locations that will experience flooding include...
    Chicago, Aurora, Joliet, Naperville, Cicero, Bolingbrook, Orland
    Park, Tinley Park, Oak Lawn, Berwyn, Wheaton, Downers Grove,
    Lombard, Romeoville, Plainfield, Calumet City, Woodridge and
    Chicago Heights.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.

&&

LAT...LON 4188 8826 4187 8790 4182 8769 4172 8764
      4171 8758 4173 8752 4142 8753 4140 8766
      4137 8771 4135 8768 4134 8753 4129 8753
      4129 8801 4131 8823 4137 8821 4150 8822
      4153 8825


$$

WSL