WGUS73 KLSX 190109
FFSLSX

Flash Flood Statement
National Weather Service St Louis MO
809 PM CDT Mon May 18 2026

MOC510-190119-
/O.CAN.KLSX.FF.W.0020.000000T0000Z-260519T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Saint Louis City MO-
809 PM CDT Mon May 18 2026

...FLASH FLOOD WARNING IS CANCELLED FOR THE EAST CENTRAL SAINT LOUIS
CITY...

Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.

A Flood Watch remains in effect until 100 PM CDT Tuesday for portions
of southwest Illinois and east central Missouri.

A Flood Watch remains in effect until 100 PM CDT Tuesday for a
portion of south central Illinois.

&&

LAT...LON 3826 9037 3835 9036 3844 9029 3852 9026
      3861 9018 3867 9018 3872 9021 3875 9018
      3876 9018 3877 9017 3882 8960 3866 8960
      3866 8971 3843 8970 3821 9035

$$

ILC027-119-133-163-MOC099-189-190200-
/O.CON.KLSX.FF.W.0020.000000T0000Z-260519T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clinton IL-Madison IL-Monroe IL-Saint Clair IL-Jefferson MO-Saint
Louis MO-
809 PM CDT Mon May 18 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING
FOR WESTERN CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS, SOUTHERN
MADISON, NORTHWESTERN MONROE AND SAINT CLAIR COUNTIES IN SOUTHWESTERN
ILLINOIS AND NORTHEASTERN JEFFERSON AND EASTERN SAINT LOUIS COUNTIES
IN EAST CENTRAL MISSOURI...

At 809 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2 inches of rain have
fallen. Additional rainfall amounts of 1 to 2 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Belleville, Granite City, O'Fallon, East St. Louis, Collinsville,
  Edwardsville, Fairview Heights, Cahokia, Swansea, Glen Carbon,
  Shiloh, Highland, Troy, Waterloo, Columbia, Maryville, Mascoutah,
  Pontoon Beach and Centreville.

This includes the following State Parks...
Frank Holten State Park and Horseshoe Lake State Park.

This includes the following highways...
Interstate 64 in Illinois between exits 9 and 27. Interstate 70 in
Illinois between exits 21 and 30.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3826 9037 3835 9036 3844 9029 3852 9026
      3861 9018 3867 9018 3872 9021 3875 9018
      3876 9018 3877 9017 3882 8960 3866 8960
      3866 8971 3843 8970 3821 9035

FLASH FLOOD...RADAR INDICATED

$$

Maples