Illinois, Missouri Flood Watch | Effective 05/18/2026 11:56
* WHAT...Flash Flooding caused by excessive rainfall continues to be<br />
possible.
* WHERE...Portions of southwest Illinois, including the following<br />
areas, Madison IL, Monroe IL and Saint Clair IL and east central<br />
Missouri, including the following areas, Jefferson MO, Lincoln MO,<br />
Saint Charles MO, Saint Louis City MO and Saint Louis MO.
* WHEN...Through Tuesday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,<br />
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...<br />