Enter any address in Warren County, Missouri to see its FEMA flood zone
Flash flooding from intense thunderstorms is the primary flood hazard in Warren County, MO. Over the last 30 years, NOAA Storm Events data shows 23 flash flood events compared to 9 general flood events. For example, on July 26, 2022, training thunderstorms produced rainfall rates exceeding 2 inches per hour, with radar estimates of up to 11 inches of rain in a localized area. Earlier, on June 25, 2021, a complex of storms brought reports of flash flooding along with damaging winds and tornadoes.
FEMA data indicates that properties in Zone A have experienced the most National Flood Insurance Program claims, with an average payout of $12,813 and an average water depth of 2.9 feet. While Zone X properties have had fewer claims, one instance in Zone X_UNSHADED recorded an average water depth of 4.0 feet, though with a lower average payout than Zone A. Homeowners in or near mapped flood zones, particularly those in Zone A or areas with documented high water depths, should pay close attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
7 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Warren County, Missouri has recorded 32 flood-related events since 1996 according to NOAA's Storm Events Database, including 23 flash floods and 9 river or area floods. The county has received 17 federal disaster declarations, 5 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1973–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Tornadoes, Straight-line Winds, And Flooding | Flood | Dec 22, 2015 |
| Flooding | Flood | Jun 1, 2011 |
| Severe Winter Storm | Severe Storm | Jan 31, 2011 |
| Severe Winter Storm | Severe Ice Storm | Jan 26, 2009 |
| Severe Storms And Flooding | Severe Storm | Mar 17, 2008 |
| Severe Winter Storms | Severe Ice Storm | Dec 8, 2007 |
| Severe Winter Storms And Flooding | Severe Ice Storm | Jan 12, 2007 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Apr 4, 2025 | 0.00K |
| Flash Flood | Jul 26, 2022 | 25.00K |
| Flash Flood | Jun 25, 2021 | 0.00K |
| Flash Flood | Jul 31, 2020 | 0.00K |
| Flash Flood | Jan 10, 2020 | 0.00K |
| Flash Flood | Aug 2, 2020 | 0.00K |
| Flash Flood | Aug 26, 2019 | 0.00K |
| Flash Flood | Dec 26, 2015 | 0.00K |
| Flash Flood | Apr 7, 2015 | 0.00K |
| Flash Flood | Jun 1, 2013 | 0.00K |
Flood — Apr 4, 2025
A stationary front over southern Missouri along with ample mid-level forcing, moisture, and efficient rain processes resulted in flooding across portions of east-central and southeast Missouri. Numerous roads across the St. Louis metropolitan area were impassable due to the heavy rainfall.
Flash Flood — Jul 26, 2022
During the early morning of Tuesday, July 26th, 2022, a complex of training thunderstorms set up roughly along the I-70 corridor in Missouri and I-64 corridor in Illinois. Several rounds of thunderstorms with rainfall rates exceeding 2in/hr affected this area, including the St. Louis metropolitan area, through the early hours of July 26th and into the morning commute. Upwards of 11 of rain fell...
Flash Flood — Jun 25, 2021
A composite outflow boundary extending from the Kansas City area towards southeast Missouri was a focus for new development from the evening hours of June 25th through June 26th. There were numerous reports of damaging winds and flash flooding with this event, as well as a tornado.
Flash Flood — Jun 25, 2021
A trough moved southeast through the region, generating a complex of showers and storms. Numerous reports of damaging winds, a few tornadoes and flash flooding were reported with this system.
Flash Flood — Jul 31, 2020
An upper level low centered over Missouri moved slowly eastward with two lobes of vorticity that were pivoting around each other. The interaction of the two vort maxes produced two distinct areas of heavy rain, one over central/east central Missouri and another over south central and southeast Missouri. Very heavy rain fell in these areas, mainly between 3 and 4 inches of rain, though a few are...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Warren County, Missouri:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Warren County, Missouri that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.