States › North Carolina › Onslow County › Flood
Flood in Onslow County, North Carolina
62 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 62 flood events in Onslow County, North Carolina, between 1950 and 2026, spread over 23 years.
August is the busiest month, with 15 of the recorded events. The last 20 years account for 44 events against 18 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.2% of the 5,375 flood events recorded in North Carolina; its 8.1 per 100 square miles compares with 11.1 statewide.
Compared with North Carolina
| Measure | Onslow County | North Carolina | US |
|---|---|---|---|
| Flood events since 1950 | 62 | 5,375 | 183,559 |
| Per 100 square miles | 8.1 | 11.1 | 5.2 |
| Per 10,000 residents | 3.0 | 5.1 | 5.5 |
| Deaths recorded | 0 | 186 | 2,961 |
| Busiest month | August | September | June |
By year
Seasonality
0Feb
0Mar
0Apr
2May
11Jun
6Jul
9Aug
15Sep
12Oct
5Nov
2Dec
0
Recorded events
All 62 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 |
|---|---|---|---|---|---|---|---|
| 1 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 28 May 2025 | Flash Flood | — | — | — | — | — | County |
| 28 May 2025 | Flash Flood | — | — | — | — | — | County |
| 28 May 2025 | Flash Flood | — | — | — | — | — | County |
| 13 May 2025 | Flash Flood | — | — | — | — | — | County |
| 13 May 2025 | Flash Flood | — | — | — | — | — | County |
| 12 May 2025 | Flash Flood | — | — | — | — | — | County |
| 8 Aug 2024 | Flash Flood | — | — | — | — | — | County |
| 31 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 31 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 31 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 31 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 31 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 31 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 9 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 21 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 12 Nov 2020 | Flash Flood | — | — | — | — | — | County |
| 13 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 13 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 16 Jun 2020 | Flash Flood | — | — | — | — | — | County |
| 16 Jun 2020 | Flash Flood | — | — | — | — | — | County |
| 29 May 2020 | Flash Flood | — | — | — | — | — | County |
| 21 May 2020 | Flash Flood | — | — | — | — | — | County |
| 14 Sep 2018 | Flash Flood | — | — | — | — | — | County |
| 31 May 2018 | Flood | — | — | — | — | — | County |
| 15 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 24 Apr 2017 | Flash Flood | — | — | — | — | — | County |
| 8 Oct 2016 | Flash Flood | — | — | — | — | — | County |
| 2 Sep 2016 | Flash Flood | — | — | — | — | — | County |
| 2 Sep 2016 | Flash Flood | — | — | — | — | — | County |
| 4 Oct 2015 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 13 Sep 2014 | Flood | — | — | — | — | — | County |
| 12 Sep 2014 | Flood | — | — | — | — | — | County |
| 6 Aug 2011 | Flood | — | — | — | — | — | County |
| 29 Jun 2011 | Flood | — | — | — | — | — | County |
| 30 Sep 2010 | Flash Flood | — | $1.0M | $6.0M | — | — | County |
| 29 Sep 2010 | Flood | — | — | — | — | — | County |
| 25 Jun 2010 | Flood | — | — | — | — | — | County |
| 12 Nov 2009 | Flood | — | — | — | — | — | County |
| 7 Sep 2009 | Flood | — | — | — | — | — | County |
| 12 Aug 2009 | Flood | — | — | — | — | — | County |
| 6 Aug 2009 | Flood | — | — | — | — | — | County |
| 15 Apr 2007 | Flood | — | — | — | — | — | County |
| 30 Jun 2006 | Flash Flood | — | — | — | — | — | County |
| 28 Jun 2006 | Flood | — | $50K | — | — | — | County |
| 7 Oct 2005 | Flood | — | — | — | — | — | Forecast zone |
| 14 Aug 2004 | Flash Flood | — | — | — | — | — | County |
| 11 Jul 2004 | Flash Flood | — | — | — | — | — | County |
| 2 Jul 2003 | Flash Flood | — | — | — | — | — | County |
| 23 May 2003 | Flash Flood | — | — | — | — | — | County |
| 31 Jul 2002 | Flash Flood | — | — | — | — | — | County |
| 18 Sep 2000 | Flash Flood | — | $1.0M | — | — | — | County |
| 4 Aug 2000 | Flash Flood | — | — | — | — | — | County |
| 4 Aug 2000 | Flash Flood | — | $100K | — | — | — | County |
| 17 Oct 1999 | Flash Flood | — | — | — | — | — | County |
| 16 Sep 1999 | Flash Flood | — | — | — | — | — | County |
| 15 Sep 1999 | Flash Flood | — | — | — | — | — | County |
| 17 May 1998 | Flash Flood | — | — | — | — | — | County |
| 8 Oct 1996 | Flash Flood | — | $80K | — | — | — | County |
| 11 Sep 1996 | Flash Flood | — | — | — | — | — | County |
| 23 Jul 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Onslow County had?
62 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 Onslow County?
1 Aug 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Onslow County?
The flash flood of 30 Sep 2010, with property damage estimated by NCEI at $1.0M and crop damage at $6.0M.
How does Onslow County compare with North Carolina for flood?
8.1 events per 100 square miles against 11.1 statewide; the county holds 62 of the state's 5,375 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.