Flood events in St. Louis County, Missouri The flood events on record, by date and by year
This page is a county record of past events and claims. It does not show the flood zone or the risk of an address. For the flood map of an address, use FEMA's address search (opens in a new tab).
NCEI has 82 flood events on record for St. Louis County, Missouri, from 1996 through 30 Jun 2026.
The newest flood event on record is on 8 Jun 2026.
From 2016 through 2025, NCEI has 31 flood events on record for the county.
The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.
The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.
Zone (NWS Forecast Zone): A zone is a geographic area defined by the NWS for issuing forecasts, watches, and warnings. While zones often align with counties, they can also represent smaller or subdivided areas within a county to account for differences in weather conditions, such as elevation or proximity to water. Larger-scale events—such as heat, cold, drought, and winter storms—are typically recorded by zone.
The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on .
Date of the data: NCEI storm events through . Event types on this page: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
Newest flood events on record
Flash Flood
1 mile N of ALLENTON
Flash Flood
1 mile SSW of LEMAY. Damage estimate: $1 thousand
Flood
1 mile ESE of PETTYS HILL. Damage estimate: $200 thousand
Flash Flood
1 mile NW of VIGUS. Damage estimate: $30 thousand
Flood
3 miles W of WEDGEWOOD
Flood
1 mile NNE of CASTLE PT. Damage estimate: $50 thousand
Flash Flood
1 mile E of BRENTWOOD. Damage estimate: $200 thousand
Flash Flood
2 miles ESE of SOUTH BELLEFONTAINE. Damage estimate: $1 thousand
Flash Flood
At SAPPINGTON
Flash Flood
1 mile SW of AFFTON
Flash Flood
2 miles SE of CENTAUR
Flash Flood
At PATTONVILLE. Damage estimate: $250 thousand
Flash Flood
1 mile N of CHESTERFIELD. Damage estimate: $75 thousand
Flash Flood
2 miles ENE of CLAYTON
Flash Flood
2 miles WNW of (SUS)SPIRIT/ST LOUIS. Damage estimate: $50 million
Flash Flood
1 mile SSE of TIMES BEACH. Damage estimate: $30 thousand
Flash Flood
1 mile ESE of LEMAY
Flash Flood
4 miles WSW of ALLENTON
Flash Flood
At ST LOUIS CREVE COEUR
Flash Flood
2 miles SE of FENTON
Flash Flood
4 miles WSW of ALLENTON
Flash Flood
3 miles WSW of ALLENTON. Damage estimate: $100 thousand
Flash Flood
1 mile SSE of FENTON
Flash Flood
2 miles NNW of BRIDGETON TERRACE
Flash Flood
1 mile WNW of CENTAUR
A place is the text of the NCEI record: a distance and a direction from a reference place. The site does not show a place text that names a private property or reads as a person. NCEI gives no magnitude for this hazard.
Flood events by year
| Decade | Year that ends in 0 | Year that ends in 1 | Year that ends in 2 | Year that ends in 3 | Year that ends in 4 | Year that ends in 5 | Year that ends in 6 | Year that ends in 7 | Year that ends in 8 | Year that ends in 9 | All |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1950s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1960s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1970s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1990s | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 1 | 5 |
| 2000s | 2 | 2 | 2 | 2 | 4 | 3 | 0 | 4 | 5 | 4 | 28 |
| 2010s | 4 | 5 | 0 | 2 | 1 | 5 | 2 | 2 | 1 | 7 | 29 |
| 2020s | 4 | 1 | 4 | 3 | 3 | 4 | 1 (part of the year) | 20 |
A darker cell has a larger count. The number is in each cell.
Flood and flash flood events are on record from 1996. The year 2026 has the events through 30 Jun 2026 only.
By month, all years
- Jan1 event
- Feb0 events
- Mar1 event
- Apr13 events
- May12 events
- Jun21 events
- Jul11 events
- Aug14 events
- Sep1 event
- Oct1 event
- Nov2 events
- Dec5 events
Beside the other counties
| Measure | St. Louis | All counties of Missouri | All counties of the United States |
|---|---|---|---|
| Flood events, 1996 to 2026 | 82 | 10,809 | 177,902 |
| Events for each 100 square miles | 16.1 | 15.7 | 5.0 |
| Events for each 10,000 residents | 0.8 | 17.5 | 5.4 |
The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. A forecast zone with another name than a county counts for the state only.
More flood events on record
| Date | Event type | Magnitude | Damage estimate | Deaths | Injuries | On record for |
|---|---|---|---|---|---|---|
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | $235 million | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | $100 thousand | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 3 | 0 | County | |
| Flash Flood | not recorded | $2 thousand | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | $65 thousand | 1 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County |
The table has all other events on record. A damage figure is an estimate in the NCEI record.
Official channels
- NCEI Storm Events Database (opens in a new tab)Search the full NCEI record by state, county and date.
- National Weather Service: St. Louis, MO (opens in a new tab)The forecast office that issues the weather warnings for the county.
- FEMA Flood Map Service Center: Search By Address (opens in a new tab)Search an address to see its flood map. This site has no flood-zone data.
These links open the pages of the agencies. The site checked the links on .
Cite this page
County Hazards. "Flood events on record for St. Louis County, Missouri". https://countyhazards.com/county/mo/st-louis/flood/. Data: NOAA NCEI Storm Events Database through 30 Jun 2026. Page made on .
Questions
- Which month has the most flood events on record for St. Louis County?
- June has 21 of the 82 flood events on record from 1996 through 30 Jun 2026.
- How many flood events are on record for Missouri?
- NCEI has 10,821 flood events on record for Missouri from 1996 through 30 Jun 2026. That count has every forecast zone of the state.
- How does St. Louis County compare with the other counties of Missouri?
- The counties of Missouri have 15.7 flood events for each 100 square miles. St. Louis County has 16.1.