Enter any address in Union County, Mississippi to see its FEMA flood zone
Flash flooding from thunderstorms is the dominant flood character in Union County, Mississippi. Over the past 30 years, the NOAA Storm Events Database recorded 28 flash flood events, alongside 4 general flood events and 2 tropical storm events. Recent examples include flash flooding on June 8, 2021, following widespread showers and thunderstorms, and another flash flood event on April 9, 2021, associated with severe storms.
National Flood Insurance Program (NFIP) claims data indicates that properties in Zone X_UNSHADED have experienced significant financial losses, with an average payout of $30,590 and an average water depth of 4.3 feet. Claims in Zone A also show substantial payouts, averaging $14,600 with 2.0 feet of water. Homeowners in these zones, as well as those in Zone X and areas with unknown flood risk designations, should pay close attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
12 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Union County, Mississippi has recorded 34 flood-related events since 1996 according to NOAA's Storm Events Database, including 28 flash floods and 4 river or area floods. The county has received 19 federal disaster declarations. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1973–2026)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Winter Storm | Jan 23, 2026 |
| Hurricane Ida | Hurricane | Aug 28, 2021 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Straight-line Winds, Tornadoes, And Flooding | Severe Storm | Feb 22, 2019 |
| Severe Storms, Tornadoes, Straight-line Winds, And Associated Flooding | Severe Storm | Apr 15, 2011 |
| Severe Storms, Tornadoes, And Flooding | Severe Storm | May 1, 2010 |
| Severe Storms, Tornadoes, And Flooding | Severe Storm | Apr 23, 2010 |
| Hurricane Gustav | Hurricane | Aug 28, 2008 |
| Hurricane Katrina | Hurricane | Aug 29, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Mar 15, 2025 | 0.00K |
| Flash Flood | Apr 9, 2021 | 0.00K |
| Flash Flood | Jun 8, 2021 | 0.00K |
| Flash Flood | Jun 8, 2021 | 50.00K |
| Flood | Feb 22, 2019 | 25.00K |
| Flood | Sep 26, 2018 | 0.00K |
| Flash Flood | Sep 26, 2018 | 15.00K |
| Flood | Feb 22, 2018 | 0.00K |
| Flash Flood | Jun 19, 2015 | 0.00K |
| Flash Flood | Jul 3, 2015 | 250.00K |
Flash Flood — Mar 15, 2025
An upper low over the Central Plains moved into the Upper Mississippi Valley during the evening hours of Friday, March 14, 2025. Increasing moisture advection ahead of an approaching cold front lifted dewpoints into the low to mid 60s. This coupled with increasing height falls and a mid-level 80 knot jet rotating around the main upper low supported severe thunderstorm development. Large looping...
Flash Flood — Apr 9, 2021
A warm front lifted north through the Mid-South during the day on April 9th. As a result, moist and unstable air pushed into the region ahead of a potent upper-level disturbance approaching from the Central Plains. A couple of lines of severe storms with large hail ignited and pushed across Northeast Arkansas and West Tennessee during the early evening hours. Another line developed across North...
Flash Flood — Jun 8, 2021
An upper low parked over the Mid-South resulted in widespread showers and thunderstorms across North Mississippi during the early morning hours of June 8, 2021. Some locations received up to 4 inches of rain before sunrise which set the stage for flash flooding later that morning into the afternoon as a mesoscale convective vortex pushed into the Mid-South. This feature resulted in several area...
Flood — Feb 22, 2019
An atmospheric river of deep subtropical moisture caused the training of moderate to heavy rainfall over already saturated grounds across a large portion of north Mississippi. This additional rainfall resulted in areal and river flooding as well as some flash flooding during the day of February 22nd.
Flood — Sep 26, 2018
A slow moving cold front moved into a moist airmass in place across the Mid-South. Showers and thunderstorms continuously developed across parts of Northeast Mississippi resulting in up to 7 inches of rain during the early morning hours of September 26th. Flash flooding and areal flooding occurred across parts of Northeast Mississippi.
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 Union County, Mississippi:
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 Union County, Mississippi 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.