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Flood in Johnston County, Oklahoma
57 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 57 flood events in Johnston County, Oklahoma, between 1950 and 2026, spread over 16 years.
May is the busiest month, with 20 of the recorded events. The last 20 years account for 52 events against 5 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.3% of the 4,346 flood events recorded in Oklahoma; its 8.9 per 100 square miles compares with 6.3 statewide.
NCEI attributes 3 deaths in the county to floods and flash floods.
Compared with Oklahoma
| Measure | Johnston County | Oklahoma | US |
|---|---|---|---|
| Flood events since 1950 | 57 | 4,346 | 183,559 |
| Per 100 square miles | 8.9 | 6.3 | 5.2 |
| Per 10,000 residents | 55.3 | 10.9 | 5.5 |
| Deaths recorded | 3 | 91 | 2,961 |
| Busiest month | May | May | June |
By year
Seasonality
0Feb
0Mar
2Apr
8May
20Jun
13Jul
3Aug
1Sep
7Oct
2Nov
0Dec
1
Recorded events
All 57 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 |
|---|---|---|---|---|---|---|---|
| 23 Jun 2026 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2025 | Flash Flood | — | $10K | — | — | — | County |
| 8 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 25 May 2025 | Flash Flood | — | — | — | — | — | County |
| 25 May 2025 | Flash Flood | — | $50K | — | — | — | County |
| 25 May 2025 | Flash Flood | — | $75K | — | — | — | County |
| 25 May 2025 | Flood | — | — | — | — | — | County |
| 25 May 2025 | Flash Flood | — | $25K | — | — | — | County |
| 2 May 2025 | Flood | — | — | — | — | — | County |
| 9 Jun 2024 | Flash Flood | — | $25K | — | — | — | County |
| 28 Apr 2024 | Flash Flood | — | — | — | — | — | County |
| 28 Apr 2024 | Flash Flood | — | — | — | — | — | County |
| 14 Mar 2024 | Flash Flood | — | — | — | — | — | County |
| 16 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 25 May 2021 | Flood | — | — | — | — | — | County |
| 25 May 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2020 | Flash Flood | — | — | — | — | — | County |
| 20 Sep 2019 | Flood | — | — | — | — | — | County |
| 1 May 2019 | Flash Flood | — | — | — | — | — | County |
| 30 Apr 2019 | Flash Flood | — | — | — | — | — | County |
| 30 Apr 2019 | Flash Flood | — | — | — | — | — | County |
| 30 Apr 2019 | Flash Flood | — | — | — | — | — | County |
| 30 Apr 2019 | Flash Flood | — | — | — | — | — | County |
| 7 Oct 2018 | Flash Flood | — | $25K | — | — | — | County |
| 7 Oct 2018 | Flood | — | — | — | 2 | — | County |
| 21 Sep 2018 | Flash Flood | — | — | — | — | — | County |
| 21 Sep 2018 | Flash Flood | — | — | — | — | — | County |
| 21 Sep 2018 | Flash Flood | — | — | — | — | — | County |
| 21 Sep 2018 | Flash Flood | — | — | — | — | — | County |
| 27 Mar 2018 | Flash Flood | — | — | — | 1 | — | County |
| 20 May 2017 | Flash Flood | — | $10K | — | — | — | County |
| 19 May 2017 | Flash Flood | — | — | — | — | — | County |
| 19 May 2017 | Flash Flood | — | — | — | — | — | County |
| 19 May 2017 | Flash Flood | — | — | — | — | — | County |
| 19 May 2017 | Flash Flood | — | $10K | — | — | — | County |
| 19 May 2017 | Flash Flood | — | — | — | — | — | County |
| 19 May 2017 | Flash Flood | — | — | — | — | — | County |
| 19 May 2017 | Flash Flood | — | — | — | — | — | County |
| 9 Jul 2016 | Flash Flood | — | — | — | — | — | County |
| 26 Dec 2015 | Flash Flood | — | $5K | — | — | — | County |
| 28 May 2015 | Flash Flood | — | — | — | — | — | County |
| 25 May 2015 | Flash Flood | — | — | — | — | — | County |
| 10 May 2015 | Flash Flood | — | $100K | — | — | — | County |
| 2 Jul 2014 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | $25K | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 14 Aug 2002 | Flash Flood | — | — | — | — | — | County |
| 7 Apr 2002 | Flash Flood | — | — | — | — | — | County |
| 20 Sep 2001 | Flash Flood | — | — | — | — | — | County |
| 27 Jun 2001 | Flash Flood | — | — | — | — | — | County |
| 23 Apr 1999 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Johnston County had?
57 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 Johnston County?
23 Jun 2026 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Johnston County?
The flash flood of 10 May 2015, with property damage estimated by NCEI at $100K.
How does Johnston County compare with Oklahoma for flood?
8.9 events per 100 square miles against 6.3 statewide; the county holds 57 of the state's 4,346 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.