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Flood in Union County, Mississippi
32 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
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. Storm records through 30 Jun 2026.
NCEI records 32 flood events in Union County, Mississippi, between 1950 and 2026, spread over 15 years.
May is the busiest month, with 5 of the recorded events. The last 20 years account for 21 events against 11 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.8% of the 3,812 flood events recorded in Mississippi; its 7.7 per 100 square miles compares with 8.1 statewide.
Compared with Mississippi
| Measure | Union County | Mississippi | US |
|---|---|---|---|
| Flood events since 1950 | 32 | 3,812 | 183,559 |
| Per 100 square miles | 7.7 | 8.1 | 5.2 |
| Per 10,000 residents | 11.4 | 12.9 | 5.5 |
| Deaths recorded | 0 | 26 | 2,961 |
| Busiest month | May | April | June |
By year
Seasonality
2Feb
2Mar
1Apr
4May
5Jun
5Jul
3Aug
2Sep
5Oct
2Nov
0Dec
1
Recorded events
All 32 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 15 Mar 2025 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2021 | Flash Flood | — | $50K | — | — | — | County |
| 9 Apr 2021 | Flash Flood | — | — | — | — | — | County |
| 22 Feb 2019 | Flood | — | $25K | — | — | — | County |
| 26 Sep 2018 | Flood | — | — | — | — | — | County |
| 26 Sep 2018 | Flash Flood | — | $15K | — | — | — | County |
| 22 Feb 2018 | Flood | — | — | — | — | — | County |
| 3 Jul 2015 | Flash Flood | — | $250K | — | — | — | County |
| 19 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 27 Apr 2011 | Flash Flood | — | — | — | — | — | County |
| 14 Jul 2010 | Flash Flood | — | — | — | — | — | County |
| 2 May 2010 | Flash Flood | — | $1.0M | — | — | — | County |
| 24 Apr 2010 | Flash Flood | — | $15K | — | — | — | County |
| 18 Sep 2009 | Flash Flood | — | — | — | — | — | County |
| 17 Sep 2009 | Flash Flood | — | — | — | — | — | County |
| 15 May 2009 | Flash Flood | — | — | — | — | — | County |
| 6 May 2009 | Flash Flood | — | — | — | — | — | County |
| 4 Apr 2008 | Flash Flood | — | $10K | — | — | — | County |
| 10 Jan 2008 | Flash Flood | — | — | — | — | — | County |
| 6 Aug 2005 | Flash Flood | — | $1K | — | — | — | County |
| 19 Oct 2004 | Flash Flood | — | $1K | — | — | — | County |
| 19 Oct 2004 | Flash Flood | — | $10K | — | — | — | County |
| 6 Aug 2003 | Flash Flood | — | $1K | — | — | — | County |
| 17 May 2003 | Flash Flood | — | $5K | — | — | — | County |
| 26 Sep 2002 | Flash Flood | — | $1K | — | — | — | County |
| 12 Jul 2002 | Flash Flood | — | $1K | — | — | — | County |
| 3 May 2002 | Flash Flood | — | $1K | — | — | — | County |
| 23 Jan 2002 | Flash Flood | — | $5K | — | — | — | County |
| 13 Dec 2001 | Flood | — | $1K | — | — | — | Forecast zone |
| 24 Jun 1999 | Flash Flood | — | $25K | — | — | — | County |
Questions and answers
How many flood events has Union County had?
32 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Union County?
15 Mar 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Union County?
The flash flood of 2 May 2010, with property damage estimated by NCEI at $1.0M.
How does Union County compare with Mississippi for flood?
7.7 events per 100 square miles against 8.1 statewide; the county holds 32 of the state's 3,812 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.