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Home Return to list Areal Flood Watch 0004 Issued by the St. Louis Forecast Office
Action: New Issued At: 2026-05-18 01:12:46
681
WGUS63 KLSX 180612
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
112 AM CDT Mon May 18 2026
MOZ041-047>051-059-060-062-072-073-182115-
/O.NEW.KLSX.FA.A.0004.260518T1200Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Sullivan, Washington, Jefferson City, Union,
Fulton, and Columbia
112 AM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH THIS
EVENING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of central and east central Missouri, including
the following areas, in central Missouri, Boone MO, Callaway MO,
Cole MO, Moniteau MO and Osage MO. In east central Missouri,
Crawford MO, Franklin MO, Gasconade MO, Montgomery MO, Warren MO
and Washington MO.
* WHEN...From 7 AM CDT this morning through this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
Britt
Action: Area Extended Issued At: 2026-05-18 09:02:42
527
WGUS63 KLSX 181402
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
902 AM CDT Mon May 18 2026
ILZ100>102-MOZ052-061-063>065-190000-
/O.EXA.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Saint Charles, Cahokia, Belleville, Alton,
Edwardsville, and Saint Louis
902 AM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts of 2 to 4 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
MOZ041-047>051-059-060-062-072-073-190000-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Columbia, Jefferson City, Sullivan,
Washington, Union, and Fulton
902 AM CDT Mon May 18 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of central and east central Missouri, including
the following areas, in central Missouri, Boone MO, Callaway MO,
Cole MO, Moniteau MO and Osage MO. In east central Missouri,
Crawford MO, Franklin MO, Gasconade MO, Montgomery MO, Warren MO
and Washington MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
BAH
Action: Continued Issued At: 2026-05-18 09:02:42
527
WGUS63 KLSX 181402
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
902 AM CDT Mon May 18 2026
ILZ100>102-MOZ052-061-063>065-190000-
/O.EXA.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Saint Charles, Cahokia, Belleville, Alton,
Edwardsville, and Saint Louis
902 AM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts of 2 to 4 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
MOZ041-047>051-059-060-062-072-073-190000-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Columbia, Jefferson City, Sullivan,
Washington, Union, and Fulton
902 AM CDT Mon May 18 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of central and east central Missouri, including
the following areas, in central Missouri, Boone MO, Callaway MO,
Cole MO, Moniteau MO and Osage MO. In east central Missouri,
Crawford MO, Franklin MO, Gasconade MO, Montgomery MO, Warren MO
and Washington MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
BAH
Action: Continued Issued At: 2026-05-18 11:22:47
073
WGUS63 KLSX 181622
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
1122 AM CDT Mon May 18 2026
ILZ064-065-069-070-074-190000-
/O.EXA.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia, Salem, and Vandalia
1122 AM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of south central Illinois, including the
following areas, Bond IL, Clinton IL, Fayette IL, Marion IL and
Washington IL.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts of 2 to 4 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
MOZ041-047>051-059-060-062-072-073-190000-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Columbia, Jefferson City, Sullivan,
Washington, Union, and Fulton
1122 AM CDT Mon May 18 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of central and east central Missouri, including
the following areas, in central Missouri, Boone MO, Callaway MO,
Cole MO, Moniteau MO and Osage MO. In east central Missouri,
Crawford MO, Franklin MO, Gasconade MO, Montgomery MO, Warren MO
and Washington MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ100>102-MOZ052-061-063>065-190000-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Saint Charles, Cahokia, Belleville, Alton,
Edwardsville, and Saint Louis
1122 AM CDT Mon May 18 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts of 2 to 4 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
BAH
Action: Continued Issued At: 2026-05-18 11:22:47
073
WGUS63 KLSX 181622
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
1122 AM CDT Mon May 18 2026
ILZ064-065-069-070-074-190000-
/O.EXA.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia, Salem, and Vandalia
1122 AM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of south central Illinois, including the
following areas, Bond IL, Clinton IL, Fayette IL, Marion IL and
Washington IL.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts of 2 to 4 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
MOZ041-047>051-059-060-062-072-073-190000-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Columbia, Jefferson City, Sullivan,
Washington, Union, and Fulton
1122 AM CDT Mon May 18 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of central and east central Missouri, including
the following areas, in central Missouri, Boone MO, Callaway MO,
Cole MO, Moniteau MO and Osage MO. In east central Missouri,
Crawford MO, Franklin MO, Gasconade MO, Montgomery MO, Warren MO
and Washington MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ100>102-MOZ052-061-063>065-190000-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Saint Charles, Cahokia, Belleville, Alton,
Edwardsville, and Saint Louis
1122 AM CDT Mon May 18 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts of 2 to 4 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
BAH
Action: Area Extended Issued At: 2026-05-18 11:22:47
073
WGUS63 KLSX 181622
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
1122 AM CDT Mon May 18 2026
ILZ064-065-069-070-074-190000-
/O.EXA.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia, Salem, and Vandalia
1122 AM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of south central Illinois, including the
following areas, Bond IL, Clinton IL, Fayette IL, Marion IL and
Washington IL.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts of 2 to 4 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
MOZ041-047>051-059-060-062-072-073-190000-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Columbia, Jefferson City, Sullivan,
Washington, Union, and Fulton
1122 AM CDT Mon May 18 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of central and east central Missouri, including
the following areas, in central Missouri, Boone MO, Callaway MO,
Cole MO, Moniteau MO and Osage MO. In east central Missouri,
Crawford MO, Franklin MO, Gasconade MO, Montgomery MO, Warren MO
and Washington MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ100>102-MOZ052-061-063>065-190000-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Saint Charles, Cahokia, Belleville, Alton,
Edwardsville, and Saint Louis
1122 AM CDT Mon May 18 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
* WHAT...Flash Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Until 7 PM CDT this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts of 2 to 4 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
BAH
Action: Time Extended Issued At: 2026-05-18 13:57:21
615
WGUS63 KLSX 181856
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
156 PM CDT Mon May 18 2026
ILZ098-099-MOZ034>036-042-191000-
/O.EXB.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO-
Including the cities of Mexico and Bowling Green
156 PM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Calhoun IL and Jersey IL and Missouri, including the
following areas, Audrain MO, Monroe MO, Pike MO and Ralls MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ064-065-069-070-074-MOZ041-047>051-059-060-062-072-073-191000-
/O.EXT.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-Boone MO-
Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Gasconade
MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Fulton, Vandalia, Union, Columbia, Jefferson
City, Salem, Centralia, Sullivan, and Washington
156 PM CDT Mon May 18 2026
...FLOOD WATCH NOW IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of south central Illinois, including the following
areas, Bond IL, Clinton IL, Fayette IL, Marion IL and Washington IL
and Missouri, including the following areas, Boone MO, Callaway MO,
Cole MO, Crawford MO, Franklin MO, Gasconade MO, Moniteau MO,
Montgomery MO, Osage MO, Warren MO and Washington MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ100>102-MOZ052-061-063>065-191000-
/O.EXT.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Edwardsville, Saint Louis, Belleville, Alton,
Saint Charles, and Cahokia
156 PM CDT Mon May 18 2026
...FLOOD WATCH NOW IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
BAH
Action: Time Extended Issued At: 2026-05-18 13:57:21
615
WGUS63 KLSX 181856
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
156 PM CDT Mon May 18 2026
ILZ098-099-MOZ034>036-042-191000-
/O.EXB.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO-
Including the cities of Mexico and Bowling Green
156 PM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Calhoun IL and Jersey IL and Missouri, including the
following areas, Audrain MO, Monroe MO, Pike MO and Ralls MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ064-065-069-070-074-MOZ041-047>051-059-060-062-072-073-191000-
/O.EXT.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-Boone MO-
Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Gasconade
MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Fulton, Vandalia, Union, Columbia, Jefferson
City, Salem, Centralia, Sullivan, and Washington
156 PM CDT Mon May 18 2026
...FLOOD WATCH NOW IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of south central Illinois, including the following
areas, Bond IL, Clinton IL, Fayette IL, Marion IL and Washington IL
and Missouri, including the following areas, Boone MO, Callaway MO,
Cole MO, Crawford MO, Franklin MO, Gasconade MO, Moniteau MO,
Montgomery MO, Osage MO, Warren MO and Washington MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ100>102-MOZ052-061-063>065-191000-
/O.EXT.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Edwardsville, Saint Louis, Belleville, Alton,
Saint Charles, and Cahokia
156 PM CDT Mon May 18 2026
...FLOOD WATCH NOW IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
BAH
Action: Time and Area Extended Issued At: 2026-05-18 13:57:21
615
WGUS63 KLSX 181856
FFALSX
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service St Louis MO
156 PM CDT Mon May 18 2026
ILZ098-099-MOZ034>036-042-191000-
/O.EXB.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Jersey IL-Monroe MO-Ralls MO-Pike MO-Audrain MO-
Including the cities of Mexico and Bowling Green
156 PM CDT Mon May 18 2026
...FLOOD WATCH IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Calhoun IL and Jersey IL and Missouri, including the
following areas, Audrain MO, Monroe MO, Pike MO and Ralls MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ064-065-069-070-074-MOZ041-047>051-059-060-062-072-073-191000-
/O.EXT.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-Boone MO-
Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Gasconade
MO-Warren MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Fulton, Vandalia, Union, Columbia, Jefferson
City, Salem, Centralia, Sullivan, and Washington
156 PM CDT Mon May 18 2026
...FLOOD WATCH NOW IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of south central Illinois, including the following
areas, Bond IL, Clinton IL, Fayette IL, Marion IL and Washington IL
and Missouri, including the following areas, Boone MO, Callaway MO,
Cole MO, Crawford MO, Franklin MO, Gasconade MO, Moniteau MO,
Montgomery MO, Osage MO, Warren MO and Washington MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ100>102-MOZ052-061-063>065-191000-
/O.EXT.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Edwardsville, Saint Louis, Belleville, Alton,
Saint Charles, and Cahokia
156 PM CDT Mon May 18 2026
...FLOOD WATCH NOW IN EFFECT THROUGH TUESDAY AFTERNOON...
* WHAT...Flash Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 2 to 4 inches, with localized
higher amounts of 4 to 6 inches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
BAH
Action: Continued Issued At: 2026-05-19 05:12:37
937
WGUS63 KLSX 191012
FFALSX
Flood Watch
National Weather Service St Louis MO
512 AM CDT Tue May 19 2026
ILZ064-065-069-070-074-098-099-MOZ034>036-041-042-047>051-059-060-
062-072-073-191800-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-Calhoun IL-
Jersey IL-Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau
MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Gasconade MO-Warren
MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Jefferson City, Union, Columbia, Fulton,
Salem, Washington, Centralia, Vandalia, Mexico, Bowling Green, and
Sullivan
512 AM CDT Tue May 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas, Bond
IL, Calhoun IL, Clinton IL, Fayette IL, Jersey IL, Marion IL and
Washington IL and Missouri, including the following areas, Audrain
MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO,
Gasconade MO, Moniteau MO, Monroe MO, Montgomery MO, Osage MO, Pike
MO, Ralls MO, Warren MO and Washington MO.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts. These amounts will occur across areas that
experienced heavy rainfall yesterday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ100>102-MOZ052-061-063>065-191800-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Alton, Saint Charles, Belleville,
Edwardsville, Cahokia, and Saint Louis
512 AM CDT Tue May 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts. These amounts will occur across areas that
experienced heavy rainfall yesterday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
Peine
Action: Continued Issued At: 2026-05-19 05:12:37
937
WGUS63 KLSX 191012
FFALSX
Flood Watch
National Weather Service St Louis MO
512 AM CDT Tue May 19 2026
ILZ064-065-069-070-074-098-099-MOZ034>036-041-042-047>051-059-060-
062-072-073-191800-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-Calhoun IL-
Jersey IL-Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau
MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Gasconade MO-Warren
MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Jefferson City, Union, Columbia, Fulton,
Salem, Washington, Centralia, Vandalia, Mexico, Bowling Green, and
Sullivan
512 AM CDT Tue May 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Illinois, including the following areas, Bond
IL, Calhoun IL, Clinton IL, Fayette IL, Jersey IL, Marion IL and
Washington IL and Missouri, including the following areas, Audrain
MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO,
Gasconade MO, Moniteau MO, Monroe MO, Montgomery MO, Osage MO, Pike
MO, Ralls MO, Warren MO and Washington MO.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts. These amounts will occur across areas that
experienced heavy rainfall yesterday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
ILZ100>102-MOZ052-061-063>065-191800-
/O.CON.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-
Including the cities of Alton, Saint Charles, Belleville,
Edwardsville, Cahokia, and Saint Louis
512 AM CDT Tue May 19 2026
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Madison IL, Monroe IL and Saint Clair IL and east central
Missouri, including the following areas, Jefferson MO, Lincoln MO,
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Potential rainfall amounts of 1 to 2 inches, with localized
higher amounts. These amounts will occur across areas that
experienced heavy rainfall yesterday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
Peine
Action: Cancelled Issued At: 2026-05-19 11:48:22 652 WGUS63 KLSX 191647 FFALSX Flood Watch National Weather Service St Louis MO 1147 AM CDT Tue May 19 2026 ILZ064-065-069-070-074-098-099-MOZ034>036-041-042-047>051-059-060- 062-072-073-191800- /O.CAN.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-Calhoun IL- Jersey IL-Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Bowling Green, Centralia, Columbia, Mexico, Fulton, Jefferson City, Washington, Union, Salem, Vandalia, and Sullivan 1147 AM CDT Tue May 19 2026 ...FLOOD WATCH IS CANCELLED... The Flood Watch is cancelled for portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Jersey IL, Marion IL and Washington IL and Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Moniteau MO, Monroe MO, Montgomery MO, Osage MO, Pike MO, Ralls MO, Warren MO and Washington MO. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ ILZ100>102-MOZ052-061-063>065-191800- /O.CAN.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Saint Charles, Edwardsville, Saint Louis, Belleville, Cahokia, and Alton 1147 AM CDT Tue May 19 2026 ...FLOOD WATCH IS CANCELLED... The Flood Watch is cancelled for portions of southwest Illinois, including the following areas, Madison IL, Monroe IL and Saint Clair IL and east central Missouri, including the following areas, Jefferson MO, Lincoln MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ Kimble Action: Cancelled Issued At: 2026-05-19 11:48:22 652 WGUS63 KLSX 191647 FFALSX Flood Watch National Weather Service St Louis MO 1147 AM CDT Tue May 19 2026 ILZ064-065-069-070-074-098-099-MOZ034>036-041-042-047>051-059-060- 062-072-073-191800- /O.CAN.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-Calhoun IL- Jersey IL-Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Gasconade MO-Warren MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Bowling Green, Centralia, Columbia, Mexico, Fulton, Jefferson City, Washington, Union, Salem, Vandalia, and Sullivan 1147 AM CDT Tue May 19 2026 ...FLOOD WATCH IS CANCELLED... The Flood Watch is cancelled for portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Jersey IL, Marion IL and Washington IL and Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Moniteau MO, Monroe MO, Montgomery MO, Osage MO, Pike MO, Ralls MO, Warren MO and Washington MO. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ ILZ100>102-MOZ052-061-063>065-191800- /O.CAN.KLSX.FA.A.0004.000000T0000Z-260519T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Madison IL-Saint Clair IL-Monroe IL-Lincoln MO-Saint Charles MO- Saint Louis MO-Saint Louis City MO-Jefferson MO- Including the cities of Saint Charles, Edwardsville, Saint Louis, Belleville, Cahokia, and Alton 1147 AM CDT Tue May 19 2026 ...FLOOD WATCH IS CANCELLED... The Flood Watch is cancelled for portions of southwest Illinois, including the following areas, Madison IL, Monroe IL and Saint Clair IL and east central Missouri, including the following areas, Jefferson MO, Lincoln MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ Kimble | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||