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Flood in McClain County, Oklahoma
33 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 33 flood events in McClain County, Oklahoma, between 1950 and 2026, spread over 16 years.
May is the busiest month, with 10 of the recorded events. The last 20 years account for 29 events against 4 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.8% of the 4,346 flood events recorded in Oklahoma; its 5.8 per 100 square miles compares with 6.3 statewide.
NCEI attributes 1 death in the county to floods and flash floods.
Compared with Oklahoma
| Measure | McClain County | Oklahoma | US |
|---|---|---|---|
| Flood events since 1950 | 33 | 4,346 | 183,559 |
| Per 100 square miles | 5.8 | 6.3 | 5.2 |
| Per 10,000 residents | 7.6 | 10.9 | 5.5 |
| Deaths recorded | 1 | 91 | 2,961 |
| Busiest month | May | May | June |
By year
Seasonality
0Feb
0Mar
1Apr
6May
10Jun
3Jul
5Aug
2Sep
4Oct
2Nov
0Dec
0
Recorded events
All 33 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 |
|---|---|---|---|---|---|---|---|
| 26 Apr 2025 | Flash Flood | — | — | — | — | — | County |
| 11 Jul 2023 | Flood | — | — | — | — | — | County |
| 8 Jun 2022 | Flood | — | — | — | — | — | County |
| 28 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 19 Mar 2020 | Flash Flood | — | — | — | — | — | County |
| 9 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 21 Sep 2018 | Flash Flood | — | — | — | — | — | County |
| 31 Aug 2016 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2016 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2016 | Flash Flood | — | — | — | — | — | County |
| 23 May 2015 | Flash Flood | — | — | — | — | — | County |
| 23 May 2015 | Flash Flood | — | — | — | — | — | County |
| 23 May 2015 | Flash Flood | — | — | — | — | — | County |
| 23 May 2015 | Flash Flood | — | — | — | — | — | County |
| 23 May 2015 | Flash Flood | — | — | — | — | — | County |
| 20 May 2015 | Flash Flood | — | $30K | — | 1 | — | County |
| 19 May 2015 | Flash Flood | — | — | — | — | — | County |
| 6 May 2015 | Flash Flood | — | — | — | — | — | County |
| 31 May 2013 | Flash Flood | — | — | — | — | — | County |
| 17 Apr 2013 | Flash Flood | — | — | — | — | — | County |
| 8 Sep 2010 | Flash Flood | — | — | — | — | — | County |
| 8 Sep 2010 | Flash Flood | — | — | — | — | — | County |
| 8 Jul 2010 | Flash Flood | — | — | — | — | — | County |
| 10 Apr 2008 | Flash Flood | — | $5K | — | — | — | County |
| 19 Aug 2007 | Flash Flood | — | $5K | — | — | — | County |
| 10 Jul 2007 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 2007 | Flash Flood | — | $400K | — | — | — | County |
| 10 Jul 2007 | Flash Flood | — | $10K | — | — | — | County |
| 7 May 2007 | Flash Flood | — | $5K | — | — | — | County |
| 11 Sep 2003 | Flash Flood | — | — | — | — | — | County |
| 22 Oct 2000 | Flash Flood | — | — | — | — | — | County |
| 22 Oct 2000 | Flash Flood | — | $30K | — | — | — | County |
| 23 Apr 1999 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has McClain County had?
33 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 McClain County?
26 Apr 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in McClain County?
The flash flood of 10 Jul 2007, with property damage estimated by NCEI at $400K.
How does McClain County compare with Oklahoma for flood?
5.8 events per 100 square miles against 6.3 statewide; the county holds 33 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.