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Flood in Johnson County, Arkansas
56 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.
Johnson County, Arkansas, has 56 flood events in the NCEI record since 1950, with at least one in 24 different years.
June is the busiest month, with 12 of the recorded events. The last 20 years account for 29 events against 27 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1% of the 5,685 flood events recorded in Arkansas; its 8.5 per 100 square miles compares with 10.9 statewide.
NCEI attributes 1 death in the county to floods and flash floods.
Compared with Arkansas
| Measure | Johnson County | Arkansas | US |
|---|---|---|---|
| Flood events since 1950 | 56 | 5,685 | 183,559 |
| Per 100 square miles | 8.5 | 10.9 | 5.2 |
| Per 10,000 residents | 21.7 | 18.8 | 5.5 |
| Deaths recorded | 1 | 92 | 2,961 |
| Busiest month | June | May | June |
By year
Seasonality
3Feb
0Mar
3Apr
7May
9Jun
12Jul
4Aug
5Sep
6Oct
3Nov
2Dec
2
Recorded events
All 56 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 Sep 2025 | Flash Flood | — | — | — | — | — | County |
| 23 Sep 2025 | Flash Flood | — | — | — | — | — | County |
| 28 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 28 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 7 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 24 Mar 2023 | Flash Flood | — | — | — | — | — | County |
| 4 Nov 2022 | Flash Flood | — | $2K | — | — | — | County |
| 29 Apr 2021 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2021 | Flash Flood | — | — | — | — | — | County |
| 24 Sep 2019 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 3 May 2019 | Flash Flood | — | — | — | — | — | County |
| 19 Aug 2018 | Flash Flood | — | — | — | — | — | County |
| 15 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 27 Dec 2015 | Flash Flood | — | — | — | — | — | County |
| 10 May 2015 | Flash Flood | — | — | — | — | — | County |
| 10 May 2015 | Flash Flood | — | $100K | — | — | — | County |
| 23 Jul 2014 | Flash Flood | — | $20K | — | — | — | County |
| 1 May 2011 | Flood | — | $250K | $250K | — | — | County |
| 26 Apr 2011 | Flood | — | $250K | — | — | — | County |
| 9 Sep 2010 | Flash Flood | — | $100K | — | — | — | County |
| 7 Sep 2010 | Flash Flood | — | $15K | — | — | — | County |
| 30 Oct 2009 | Flood | — | $25K | — | — | — | County |
| 29 Oct 2009 | Flash Flood | — | $2.0M | — | — | — | County |
| 13 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 10 Apr 2008 | Flash Flood | — | — | — | — | — | County |
| 18 Mar 2008 | Flash Flood | — | $100K | — | — | — | County |
| 15 May 2007 | Flash Flood | — | — | — | — | — | County |
| 16 Oct 2006 | Flash Flood | — | — | — | — | — | County |
| 20 Aug 2006 | Flash Flood | — | — | — | — | — | County |
| 12 Jan 2005 | Flash Flood | — | — | — | — | — | County |
| 24 Sep 2004 | Flash Flood | — | — | — | — | — | County |
| 3 Jul 2004 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2004 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2004 | Flash Flood | — | — | — | — | — | County |
| 24 Apr 2004 | Flash Flood | — | — | — | — | — | County |
| 23 Apr 2004 | Flash Flood | — | — | — | — | — | County |
| 19 Mar 2002 | Flash Flood | — | — | — | — | — | County |
| 31 Jan 2002 | Flash Flood | — | — | — | — | — | County |
| 16 Dec 2001 | Flash Flood | — | — | — | — | — | County |
| 21 Jun 2000 | Flash Flood | — | — | — | — | — | County |
| 17 Jun 2000 | Flash Flood | — | — | — | — | — | County |
| 17 Jun 2000 | Flash Flood | — | — | — | — | — | County |
| 27 May 2000 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 1999 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 12 May 1999 | Flash Flood | — | — | — | — | — | County |
| 4 May 1999 | Flash Flood | — | — | — | — | — | County |
| 4 May 1999 | Flash Flood | — | — | — | — | — | County |
| 5 Jan 1998 | Flash Flood | — | $15K | — | — | — | County |
| 5 Apr 1997 | Flash Flood | — | — | — | 1 | — | County |
| 24 Nov 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Johnson County had?
56 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 Johnson County?
23 Sep 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Johnson County?
The flash flood of 29 Oct 2009, with property damage estimated by NCEI at $2.0M.
How does Johnson County compare with Arkansas for flood?
8.5 events per 100 square miles against 10.9 statewide; the county holds 56 of the state's 5,685 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.