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Union County, Mississippi
Recorded hazard history: storm events since 1950, federal disaster declarations since 1953, flood insurance claims since 1978, and FEMA's risk index.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. NCEI storm records through 30 Jun 2026; OpenFEMA declarations refreshed 1 Oct 2026; NFIP claims as of 8 Sep 2026.
Union County, Mississippi, has 460 weather events in the NCEI Storm Events record since 1950, most of them damaging wind.
That is 110.7 events per 100 square miles, in line with the Mississippi figure of 89.7, and 164.6 per 10,000 residents against 142.8 statewide.
22 events fall in the 12 months to 30 Jun 2026. NCEI attributes 6 deaths and 35 injuries to events in the county, with property damage estimated at $34M.
FEMA has designated the county in 19 federal disaster declarations since 1953; the most recent is Severe Winter Storm (major disaster, 6 Feb 2026).
National Flood Insurance Program policyholders in the county filed 19 claims since 1978, of which 16 were paid, totalling $504K (about $31K per paid claim). FEMA counts 15 residential flood policies in force.
FEMA's National Risk Index rates the county's overall risk as "Relatively Low" and its expected annual loss as "Very Low" ($11M a year across 18 hazards).
17 tropical storm or hurricane tracks in the HURDAT2 record passed within 100 miles of the county's centre at tropical-storm strength or more, 0 of them within 50 miles at hurricane strength.
Compared with Mississippi and the United States
| Measure | Union County | Mississippi | US |
|---|---|---|---|
| Recorded events since 1950 | 460 | 42,114 | 1,977,440 |
| Events per 100 square miles | 110.7 | 89.7 | 56.0 |
| Events per 10,000 residents | 164.6 | 142.8 | 59.6 |
| Events in the last 12 months | 22 | 1,524 | 62,008 |
| Deaths recorded by NCEI | 6 | 928 | 26,435 |
| Property damage (NCEI estimates) | $34M | $31B | $575B |
| NFIP claims per 1,000 residents | 0.7 | 21.9 | 8.1 |
| Average paid NFIP claim | $31K | $58K | $43K |
| Claims per 100 policies in force, last 10 years | 6.7 | 11.5 | 16.1 |
County-recorded events plus zone-recorded events whose forecast zone is named for the county. State and US rows include events recorded only by forecast zone. Rates use 2021 Census population and land area.
Events by decade
Trend: 319 events in the 20 years to 2025 against 102 in the 20 years before. Reporting practice changed in 1996 and again with automated reports in the 2000s, so decade totals measure the record as much as the weather.
Events by type
Hazard pages exist for hail, tornado, flood, wind and winter where the county has at least 10 recorded events. "Other" covers heavy rain, debris flow, dust, funnel clouds and similar reports.
Largest recorded events
| Date | Event type | Group | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|---|
| 12 Feb 1950 | Tornado | Tornado | F2 | $25K | — | 3 | 2 | County |
| 21 Apr 1984 | Tornado | Tornado | F3 | $25M | — | 1 | 2 | County |
| 24 May 2015 | Thunderstorm Wind | Wind | 40 mph | — | — | 1 | 2 | County |
| 1 May 2010 | Heavy Rain | Other | — | — | — | 1 | — | County |
| 1 Mar 1997 | Tornado | Tornado | F3 | $250K | — | — | 16 | County |
| 3 Jan 2000 | Tornado | Tornado | F3 | $250K | — | — | 4 | County |
| 17 Mar 1965 | Tornado | Tornado | F3 | $250K | — | — | 3 | County |
| 21 Sep 1958 | Tornado | Tornado | F2 | $25K | — | — | 2 | County |
| 16 Dec 2019 | Tornado | Tornado | EF1 | $250K | — | — | 1 | County |
| 24 Mar 2023 | Tornado | Tornado | EF1 | $55K | — | — | 1 | County |
| 27 Apr 2011 | Thunderstorm Wind | Wind | 81 mph | — | — | — | 1 | County |
| 9 Jun 2014 | Thunderstorm Wind | Wind | 58 mph | — | — | — | 1 | County |
| 5 Apr 2025 | Tornado | Tornado | EF1 | $1.8M | — | — | — | County |
| 2 May 2010 | Flash Flood | Flood | — | $1.0M | — | — | — | County |
| 23 Jan 2026 | Ice Storm | Winter | — | $1.0M | — | — | — | Forecast zone |
| 27 May 2017 | Thunderstorm Wind | Wind | 69 mph | $500K | — | — | — | County |
| 21 Jan 1959 | Tornado | Tornado | F3 | $250K | — | — | — | County |
| 24 Apr 1976 | Tornado | Tornado | F2 | $250K | — | — | — | County |
| 18 Mar 1986 | Tornado | Tornado | F1 | $250K | — | — | — | County |
| 18 Mar 1987 | Tornado | Tornado | F1 | $250K | — | — | — | County |
Ranked by deaths, then injuries, then NCEI's damage estimate. Deaths and injuries are NCEI counts (direct plus indirect); no personal details are recorded here.
Federal disaster declarations
| Declared | Number | Type | Incident | Title | Programs |
|---|---|---|---|---|---|
| 6 Feb 2026 | DR-4899 | Major disaster | Winter Storm | Severe Winter Storm | Individual assistance, Public assistance |
| 24 Jan 2026 | EM-3640 | Emergency | Winter Storm | Severe Winter Storm | Public assistance |
| 22 Oct 2021 | DR-4626 | Major disaster | Hurricane | Hurricane Ida | Public assistance |
| 28 Aug 2021 | EM-3569 | Emergency | Hurricane | Hurricane Ida | Public assistance |
| 5 Apr 2020 | DR-4528 | Major disaster | Biological | Covid-19 Pandemic | Individual assistance, Public assistance |
| 13 Mar 2020 | EM-3474 | Emergency | Biological | Covid-19 | Public assistance |
| 23 Apr 2019 | DR-4429 | Major disaster | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Flooding | Public assistance |
| 29 Apr 2011 | DR-1972 | Major disaster | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, And Associated Flooding | Public assistance |
| 14 May 2010 | DR-1916 | Major disaster | Severe Storm | Severe Storms, Tornadoes, And Flooding | Public assistance |
| 29 Apr 2010 | DR-1906 | Major disaster | Severe Storm | Severe Storms, Tornadoes, And Flooding | Individual assistance |
| 30 Aug 2008 | EM-3291 | Emergency | Hurricane | Hurricane Gustav | Public assistance |
| 29 Aug 2005 | DR-1604 | Major disaster | Hurricane | Hurricane Katrina | Public assistance |
| 23 Feb 2001 | DR-1360 | Major disaster | Severe Storm | Severe Storms And Tornadoes | Individual assistance |
| 25 Jan 1999 | DR-1265 | Major disaster | Severe Ice Storm | Severe Winter Storms, Ice And Freezing Rain | Public assistance |
| 18 Feb 1994 | DR-1009 | Major disaster | Severe Storm | Severe Winter Storm, Freeezing Rain And Sleet | Public assistance |
| 17 May 1991 | DR-906 | Major disaster | Severe Storm | Severe Storms, Tornadoes & Flooding | Individual assistance, Public assistance |
| 28 Feb 1990 | DR-859 | Major disaster | Severe Storm | Severe Storms, Tornadoes & Flooding | Individual assistance, Public assistance |
| 26 Apr 1984 | DR-703 | Major disaster | Tornado | Tornadoes | Individual assistance |
| 27 Mar 1973 | DR-368 | Major disaster | Severe Storm | Heavy Rains, Tornadoes & Flooding | Individual assistance, Public assistance |
Declarations in which FEMA designated this county, from the OpenFEMA Disaster Declarations Summaries (v2). DR: major disaster; EM: emergency; FM: fire management assistance. Programs show whether individual or public assistance was made available.
Flood insurance claims
| Year of loss | Claims | Paid claims | Amount paid | Average paid |
|---|---|---|---|---|
| 2025 | 1 | 0 | $0 | — |
| 2015 | 1 | 1 | $4,606 | $4,606 |
| 2012 | 4 | 3 | $20,933 | $6,978 |
| 2011 | 2 | 1 | $43,000 | $43,000 |
| 2010 | 1 | 1 | $231,911 | $231,911 |
| 2004 | 5 | 5 | $121,236 | $24,247 |
| 2003 | 1 | 1 | $11,309 | $11,309 |
| 2002 | 1 | 1 | $37,821 | $37,821 |
| 1999 | 2 | 2 | $29,200 | $14,600 |
| 1983 | 1 | 1 | $3,809 | $3,809 |
OpenFEMA NFIP claims (v3, as of 8 Sep 2026), aggregated by year of loss; amounts are building, contents and increased-cost-of-compliance payments as recorded. Repetitive-loss counts from the NFIP Multiple Loss Properties file (2 Aug 2026); policies in force from the NFIP Residential Penetration Rates file (3 Aug 2026).
National Risk Index
| Hazard (NRI) | Risk rating | Expected annual loss |
|---|---|---|
| Inland flooding | $3,454,176 | |
| Earthquake | $2,140,777 | |
| Cold wave | $1,862,696 | |
| Tornado | $862,216 | |
| Heat wave | $765,161 | |
| Strong wind | $699,413 | |
| Lightning | $269,752 | |
| Hurricane | $191,783 | |
| Hail | $86,729 | |
| Drought | $78,256 | |
| Ice storm | $47,510 | |
| Wildfire | $30,641 | |
| Winter weather | $8,399 | |
| Landslide | $3,316 |
FEMA National Risk Index, December 2025 release. Ratings are FEMA's relative comparison of counties; expected annual loss is FEMA's modelled estimate of average yearly building, population and agriculture loss. See how to read the NRI.
Hurricane and tropical storm passes
| Storm | Year | Closest approach | Max wind while within 100 mi |
|---|---|---|---|
| Katrina | 2005 | 35 mi | 46 mph |
| Frederic | 1979 | 66 mi | 52 mph |
| Camille | 1969 | 59 mi | 58 mph |
| Audrey | 1957 | 15 mi | 40 mph |
| Baker | 1950 | 27 mi | 46 mph |
| Unnamed Atlantic storm | 1934 | 30 mi | 40 mph |
| Unnamed Atlantic storm | 1932 | 94 mi | 40 mph |
| Unnamed Atlantic storm | 1923 | 71 mi | 40 mph |
| Unnamed Atlantic storm | 1916 | 53 mi | 46 mph |
| Unnamed Atlantic storm | 1916 | 90 mi | 52 mph |
| Unnamed Atlantic storm | 1915 | 70 mi | 46 mph |
| Unnamed Atlantic storm | 1906 | 53 mi | 46 mph |
| Unnamed Atlantic storm | 1893 | 83 mi | 40 mph |
| Unnamed Atlantic storm | 1888 | 66 mi | 63 mph |
| Unnamed Atlantic storm | 1881 | 34 mi | 46 mph |
| Unnamed Atlantic storm | 1879 | 74 mi | 46 mph |
| Unnamed Atlantic storm | 1860 | 16 mi | 46 mph |
HURDAT2 best-track positions at tropical-storm strength (34 kt) or more, measured from the county's Census centre point; through the 2025 season. Distance from a track is not the same as the extent of the storm's wind, rain or surge.
ZIP codes with flood claims
- 38652 18
ZIP codes whose NFIP claims carry this county's code, with the number of claims. Five or more claims are needed for a ZIP page to be indexed.
Questions and answers
How often does it hail in Union County, MS?
NCEI records 103 hail events in Union County since 1950, in 45 different years; that is about 1.3 recorded events a year. 26 reports were golf-ball size (1.75 in) or larger.
Has Union County had a tornado?
Yes. NCEI records 27 tornadoes in Union County since 1950, 13 of them rated (E)F2 or stronger. Tornado deaths recorded: 4.
When was the last federal disaster declaration for Union County?
6 Feb 2026: Severe Winter Storm, a major disaster declaration for winter storm. The county appears in 19 declarations since 1953.
How many flood insurance claims have been filed in Union County, and how much was paid?
19 NFIP claims since 1978, 16 of them paid, for $504K in total. FEMA publishes these figures redacted and aggregated; individual properties are not identified.
Is Union County in the National Risk Index's high-risk band?
FEMA's National Risk Index (December 2025) rates the county "Relatively Low" for overall risk, "Very Low" for expected annual loss, "Relatively High" for social vulnerability and "Relatively Moderate" for community resilience. These ratings are FEMA's relative comparison across all US counties.
How does Union County compare with the rest of Mississippi?
110.7 recorded events per 100 square miles against 89.7 statewide, and 0.7 NFIP claims per 1,000 residents against 21.9. The comparison table on this page shows each measure beside the state and national figures.
Provenance
Storm events: NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026 (public domain). Declarations: OpenFEMA DisasterDeclarationsSummaries v2, refreshed 1 Oct 2026. Flood claims: OpenFEMA NfipClaims v3 as of 8 Sep 2026; NfipMultipleLossProperties v1 (2 Aug 2026); NfipResidentialPenetrationRates v1 (3 Aug 2026). Risk index: FEMA National Risk Index, December 2025. Hurricane tracks: NHC HURDAT2 through 2025. Population and area: US Census Bureau, 2021 vintage. Built 1 Oct 2026; see the methodology and corrections pages. Hazard hubs: Hail · Tornado · Flood · Wind · Winter.