States › Tennessee › Union County › Flood
Flood in Union County, Tennessee
17 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 17 flood events in Union County, Tennessee, between 1950 and 2026, spread over 12 years.
February is the busiest month, with 8 of the recorded events. The last 20 years account for 8 events against 9 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.4% of the 4,414 flood events recorded in Tennessee; its 7.6 per 100 square miles compares with 10.7 statewide.
Compared with Tennessee
| Measure | Union County | Tennessee | US |
|---|---|---|---|
| Flood events since 1950 | 17 | 4,414 | 183,559 |
| Per 100 square miles | 7.6 | 10.7 | 5.2 |
| Per 10,000 residents | 8.5 | 6.3 | 5.5 |
| Deaths recorded | 0 | 121 | 2,961 |
| Busiest month | February | February | June |
By year
Seasonality
2Feb
8Mar
2Apr
3May
0Jun
0Jul
1Aug
0Sep
1Oct
0Nov
0Dec
0
Recorded events
All 17 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 |
|---|---|---|---|---|---|---|---|
| 16 Feb 2023 | Flood | — | — | — | — | — | County |
| 23 Feb 2022 | Flood | — | — | — | — | — | County |
| 6 Feb 2019 | Flash Flood | — | — | — | — | — | County |
| 11 Feb 2018 | Flood | — | — | — | — | — | County |
| 1 Mar 2017 | Flash Flood | — | — | — | — | — | County |
| 30 Jan 2013 | Flood | — | — | — | — | — | County |
| 28 Feb 2011 | Flood | — | $1.5M | — | — | — | County |
| 26 Sep 2009 | Flood | — | — | — | — | — | County |
| 10 Apr 2003 | Flood | — | — | — | — | — | Forecast zone |
| 21 Feb 2003 | Flood | — | — | — | — | — | Forecast zone |
| 16 Feb 2003 | Flash Flood | — | — | — | — | — | County |
| 14 Feb 2003 | Flood | — | $132K | — | — | — | Forecast zone |
| 17 Mar 2002 | Flood | — | — | — | — | — | Forecast zone |
| 23 Jan 2002 | Flash Flood | — | — | — | — | — | County |
| 11 Jul 1999 | Flash Flood | — | — | — | — | — | County |
| 19 Apr 1998 | Flood | — | — | — | — | — | County |
| 16 Apr 1998 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Union County had?
17 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?
16 Feb 2023 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Union County?
The flood of 28 Feb 2011, with property damage estimated by NCEI at $1.5M.
How does Union County compare with Tennessee for flood?
7.6 events per 100 square miles against 10.7 statewide; the county holds 17 of the state's 4,414 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.