Illinois, Missouri Severe Flood Watch | Effective 06/21/2026 15:52
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of southwest Illinois, including the following
area, Calhoun IL and Missouri, including the following areas, Boone
MO, Callaway MO, Cole MO, Gasconade MO, Lincoln MO, Moniteau MO,
Montgomery MO, Osage MO and Warren 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...