Enter any address in Boone County, Missouri to see its FEMA flood zone
Flash flooding from intense thunderstorms is the primary flood concern in Boone County. Over the last 30 years, the NOAA Storm Events Database recorded 71 flash flood events, significantly more than the 13 general flood events. Recent examples include flash flooding reported on July 14, 2023, and August 2, 2023, following periods of heavy rainfall from strong storms.
National Flood Insurance Program (NFIP) claims data indicates that properties in Zone A have experienced the most claims, with an average payout of $27,742 and an average water depth of 4.2 feet. While Zone X_SHADED and Zone X have seen fewer claims, properties in Zone X have had a higher average payout ($11,506) with an average water depth of 1.2 feet. Homeowners in Zone A, as well as those in Zone X, 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.
Boone County, Missouri has recorded 84 flood-related events since 1996 according to NOAA's Storm Events Database, including 71 flash floods and 13 river or area floods. The county has received 27 federal disaster declarations, 6 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1973–2021)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storms, Straight-line Winds, Tornadoes, And Flooding | Severe Storm | Jun 24, 2021 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Tornadoes, And Flooding | Severe Storm | Apr 29, 2019 |
| Severe Storms, Tornadoes, Straight-line Winds And Flooding | Flood | Apr 28, 2017 |
| 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 And Snowstorm | Severe Storm | Jan 31, 2011 |
| Severe Winter Storm | Severe Ice Storm | Jan 26, 2009 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jul 14, 2023 | 0.00K |
| Flash Flood | Aug 2, 2023 | 0.00K |
| Flash Flood | Jun 25, 2021 | 0.00K |
| Flood | Jun 25, 2021 | 0.00K |
| Flash Flood | Jun 19, 2021 | 0.00K |
| Flash Flood | Jul 1, 2021 | 0.00K |
| Flash Flood | Aug 10, 2020 | 0.00K |
| Flash Flood | Jun 22, 2019 | 0.00K |
| Flash Flood | Aug 12, 2019 | 0.00K |
| Flash Flood | Aug 11, 2019 | 0.00K |
Flash Flood — Jul 14, 2023
Isolated storms developed in an area where dewpoints in the low to mid 70s pooled. There was some weak surface convergence, ML CAPEs over 2000 J/kg, and steep low-level lapse rates, so there were some localized damaging microbursts with the severe storms. An area of storms over northern St. Clair County in Illinois produced up to 5 inches of rain in about a two hour period with some reports of ...
Flash Flood — Aug 2, 2023
A swath of strong to severe storms with very heavy rainfall rates moved southeast across portions of northern and central Missouri during the early morning hours of August 2nd. There were several reports of flash flooding.
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.
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 — 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.
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 Boone 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 Boone 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.