2 appeal windows open

Flood map changes in Missouri

Since November 2023, FEMA has published flood hazard notices covering 26 of Missouri's 115 counties.

CountyNoticesMost recentAppeal window
Buchanan County2Aug 6, 2026—
Montgomery County1Aug 6, 2026Open until Nov 4, 2026
Warren County1Aug 6, 2026Open until Nov 4, 2026
Howell County1May 7, 2026—
Oregon County1May 7, 2026—
Ozark County1May 7, 2026—
Pettis County2Jan 29, 2026—
St. Louis County6Nov 20, 2025—
Harrison County2Aug 20, 2025—
Jackson County4Jul 18, 2025—
Bollinger County2Jun 11, 2025—
Jefferson County2May 20, 2025—
Shannon County1May 20, 2025—
Greene County1Apr 17, 2025—
Texas County1Apr 17, 2025—
Webster County1Apr 17, 2025—
Johnson County2Mar 26, 2025—
Maries County1Mar 26, 2025—
Reynolds County1Mar 26, 2025—
Barry County1Jan 8, 2025—
Carter County1Jan 8, 2025—
Douglas County1Jan 8, 2025—
St. Clair County1Jan 8, 2025—
St. Charles County3Oct 30, 2024—
Adair County2Oct 21, 2024—
Stone County1Apr 22, 2024—

All counties in Missouri

What these notices mean

Proposed
FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
Final
Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
Map revision
A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.

Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean