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Flood in Sullivan County, Tennessee
50 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.
Sullivan County, Tennessee, has 50 flood events in the NCEI record since 1950, with at least one in 21 different years.
July is the busiest month, with 15 of the recorded events. The last 20 years account for 29 events against 21 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.1% of the 4,414 flood events recorded in Tennessee; its 12.1 per 100 square miles compares with 10.7 statewide.
Compared with Tennessee
| Measure | Sullivan County | Tennessee | US |
|---|---|---|---|
| Flood events since 1950 | 50 | 4,414 | 183,559 |
| Per 100 square miles | 12.1 | 10.7 | 5.2 |
| Per 10,000 residents | 3.1 | 6.3 | 5.5 |
| Deaths recorded | 0 | 121 | 2,961 |
| Busiest month | July | February | June |
By year
Seasonality
2Feb
6Mar
6Apr
4May
5Jun
4Jul
15Aug
3Sep
4Oct
0Nov
0Dec
1
Recorded events
All 50 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 |
|---|---|---|---|---|---|---|---|
| 13 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 13 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 13 Aug 2025 | Flood | — | — | — | — | — | County |
| 30 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 30 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 30 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 30 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 26 Sep 2024 | Flood | — | — | — | — | — | County |
| 14 Jul 2023 | Flood | — | — | — | — | — | County |
| 24 Feb 2022 | Flash Flood | — | — | — | — | — | County |
| 28 Mar 2021 | Flash Flood | — | — | — | — | — | County |
| 28 Mar 2021 | Flash Flood | — | — | — | — | — | County |
| 28 Mar 2021 | Flood | — | — | — | — | — | County |
| 28 Mar 2021 | Flash Flood | — | — | — | — | — | County |
| 6 Feb 2020 | Flood | — | $2K | — | — | — | County |
| 6 Feb 2020 | Flood | — | — | — | — | — | County |
| 22 Jul 2019 | Flash Flood | — | — | — | — | — | County |
| 7 Feb 2019 | Flood | — | — | — | — | — | County |
| 15 Apr 2018 | Flood | — | $1K | — | — | — | County |
| 23 Apr 2017 | Flood | — | $2K | — | — | — | County |
| 17 Jul 2013 | Flash Flood | — | $50K | — | — | — | County |
| 15 Jan 2013 | Flood | — | $1K | — | — | — | County |
| 10 Jul 2012 | Flood | — | $1K | — | — | — | County |
| 25 Apr 2011 | Flash Flood | — | — | — | — | — | County |
| 9 Dec 2009 | Flood | — | — | — | — | — | County |
| 26 Sep 2009 | Flood | — | — | — | — | — | County |
| 25 Sep 2009 | Flash Flood | — | — | — | — | — | County |
| 24 Sep 2009 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2007 | Flash Flood | — | $10K | — | — | — | County |
| 11 Jun 2003 | Flash Flood | — | — | — | — | — | County |
| 10 Apr 2003 | Flood | — | — | — | — | — | Forecast zone |
| 21 Feb 2003 | Flood | — | — | — | — | — | Forecast zone |
| 14 Feb 2003 | Flood | — | — | — | — | — | Forecast zone |
| 17 Mar 2002 | Flood | — | — | — | — | — | Forecast zone |
| 29 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 3 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 24 Jul 1999 | Flood | — | — | — | — | — | County |
| 11 Jul 1999 | Flash Flood | — | — | — | — | — | County |
| 24 Jun 1998 | Flood | — | — | — | — | — | County |
| 22 Jun 1998 | Flood | — | — | — | — | — | County |
| 22 Jul 1997 | Flood | — | — | — | — | — | County |
| 26 May 1997 | Flash Flood | — | — | — | — | — | County |
| 26 May 1996 | Flash Flood | — | — | — | — | — | County |
| 25 May 1996 | Flash Flood | — | — | — | — | — | County |
| 24 May 1996 | Flash Flood | — | — | — | — | — | County |
| 24 May 1996 | Flash Flood | — | $20K | — | — | — | County |
| 15 Mar 1996 | Flash Flood | — | — | — | — | — | County |
| 19 Jan 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Sullivan County had?
50 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 Sullivan County?
13 Aug 2025 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Sullivan County?
The flash flood of 17 Jul 2013, with property damage estimated by NCEI at $50K.
How does Sullivan County compare with Tennessee for flood?
12.1 events per 100 square miles against 10.7 statewide; the county holds 50 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.