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Flood in Johnson County, Missouri
141 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 141 flood events in Johnson County, Missouri, between 1950 and 2026, spread over 21 years.
May is the busiest month, with 24 of the recorded events. The last 20 years account for 59 events against 82 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.3% of the 10,821 flood events recorded in Missouri; its 17.0 per 100 square miles compares with 15.7 statewide.
NCEI attributes 1 death in the county to floods and flash floods.
Compared with Missouri
| Measure | Johnson County | Missouri | US |
|---|---|---|---|
| Flood events since 1950 | 141 | 10,821 | 183,559 |
| Per 100 square miles | 17.0 | 15.7 | 5.2 |
| Per 10,000 residents | 26.0 | 17.5 | 5.5 |
| Deaths recorded | 1 | 159 | 2,961 |
| Busiest month | May | May | June |
By year
Seasonality
7Feb
14Mar
8Apr
21May
24Jun
22Jul
18Aug
11Sep
6Oct
2Nov
4Dec
4
Recorded events
All 141 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 |
|---|---|---|---|---|---|---|---|
| 30 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 30 Jul 2020 | Flood | — | — | — | — | — | County |
| 29 Jul 2020 | Flood | — | — | — | — | — | County |
| 28 May 2020 | Flood | — | — | — | — | — | County |
| 28 Sep 2019 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 30 Apr 2019 | Flash Flood | — | — | — | — | — | County |
| 30 Apr 2019 | Flash Flood | — | — | — | — | — | County |
| 22 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 6 Aug 2017 | Flood | — | — | — | — | — | County |
| 5 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2017 | Flash Flood | — | — | — | — | — | County |
| 28 Jul 2017 | Flood | — | — | — | — | — | County |
| 27 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 10 Sep 2016 | Flood | — | — | — | — | — | County |
| 3 Jul 2016 | Flood | — | — | — | — | — | County |
| 26 May 2016 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2015 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2015 | Flash Flood | — | — | — | — | — | County |
| 3 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 3 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 3 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 3 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 3 Apr 2014 | Flash Flood | — | — | — | — | — | County |
| 3 Apr 2014 | Flash Flood | — | — | — | — | — | County |
| 3 Apr 2014 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 25 May 2010 | Flash Flood | — | — | — | — | — | County |
| 25 May 2010 | Flash Flood | — | — | — | — | — | County |
| 25 May 2010 | Flash Flood | — | — | — | — | — | County |
| 25 May 2010 | Flash Flood | — | — | — | — | — | County |
| 11 Feb 2009 | Flood | — | — | — | — | — | County |
| 27 Dec 2008 | Flash Flood | — | — | — | — | — | County |
| 27 Dec 2008 | Flood | — | — | — | — | — | County |
| 19 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 19 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 3 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 24 Apr 2008 | Flood | — | — | — | — | — | County |
| 10 Apr 2008 | Flood | — | — | — | — | — | County |
| 8 Apr 2008 | Flood | — | — | — | — | — | County |
| 17 Mar 2008 | Flood | — | — | — | — | — | County |
| 3 Mar 2008 | Flood | — | — | — | — | — | County |
| 17 Feb 2008 | Flood | — | — | — | — | — | County |
| 5 Feb 2008 | Flood | — | — | — | — | — | County |
| 1 Jul 2007 | Flood | — | — | — | — | — | County |
| 29 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 28 Jun 2007 | Flood | — | — | — | — | — | County |
| 7 May 2007 | Flood | — | — | — | — | — | County |
| 26 Apr 2007 | Flood | — | — | — | — | — | County |
| 14 Apr 2007 | Flood | — | — | — | — | — | County |
| 25 Feb 2007 | Flood | — | — | — | — | — | County |
| 20 Feb 2007 | Flood | — | — | — | — | — | County |
| 31 May 2006 | Flood | — | — | — | — | — | County |
| 30 Apr 2006 | Flood | — | — | — | — | — | County |
| 26 Aug 2005 | Flood | — | — | — | — | — | Forecast zone |
| 13 Feb 2005 | Flood | — | — | — | — | — | Forecast zone |
| 13 Jan 2005 | Flood | — | — | — | — | — | Forecast zone |
| 12 Jan 2005 | Flash Flood | — | — | — | — | — | County |
| 3 Jan 2005 | Flood | — | — | — | — | — | Forecast zone |
| 24 Nov 2004 | Flood | — | — | — | — | — | Forecast zone |
| 1 Nov 2004 | Flood | — | — | — | — | — | Forecast zone |
| 18 Sep 2004 | Flood | — | — | — | — | — | Forecast zone |
| 25 Jul 2004 | Flood | — | — | — | — | — | Forecast zone |
| 24 Jul 2004 | Flash Flood | — | — | — | — | — | County |
| 24 Jul 2004 | Flash Flood | — | — | — | — | — | County |
| 10 Jun 2004 | Flood | — | — | — | — | — | Forecast zone |
| 19 May 2004 | Flash Flood | — | — | — | — | — | County |
| 19 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 28 Mar 2004 | Flood | — | — | — | — | — | Forecast zone |
| 4 Mar 2004 | Flood | — | — | — | — | — | Forecast zone |
| 18 Jan 2004 | Flood | — | — | — | — | — | Forecast zone |
| 10 Dec 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 9 May 2003 | Flash Flood | — | — | — | — | — | County |
| 25 May 2002 | Flood | — | — | — | — | — | Forecast zone |
| 11 May 2002 | Flash Flood | — | — | — | — | — | County |
| 8 May 2002 | Flash Flood | — | — | — | — | — | County |
| 8 May 2002 | Flash Flood | — | — | — | — | — | County |
| 7 May 2002 | Flood | — | — | — | — | — | Forecast zone |
| 25 Jul 2001 | Flood | — | — | — | — | — | Forecast zone |
| 12 Jul 2001 | Flood | — | — | — | — | — | Forecast zone |
| 20 Jun 2001 | Flood | — | — | — | — | — | Forecast zone |
| 3 Jun 2001 | Flood | — | — | — | — | — | Forecast zone |
| 3 Jun 2001 | Flood | — | — | — | — | — | Forecast zone |
| 21 May 2001 | Flood | — | — | — | — | — | Forecast zone |
| 11 May 2001 | Flood | — | — | — | — | — | Forecast zone |
| 15 Apr 2001 | Flood | — | — | — | — | — | Forecast zone |
| 14 Apr 2001 | Flash Flood | — | — | — | — | — | County |
| 11 Apr 2001 | Flood | — | — | — | — | — | Forecast zone |
| 10 Apr 2001 | Flash Flood | — | — | — | — | — | County |
| 3 Apr 2001 | Flood | — | — | — | — | — | Forecast zone |
| 24 Feb 2001 | Flood | — | — | — | — | — | Forecast zone |
| 9 Feb 2001 | Flood | — | — | — | — | — | Forecast zone |
| 30 Jan 2001 | Flood | — | — | — | — | — | Forecast zone |
| 20 Jun 2000 | Flood | — | — | — | — | — | Forecast zone |
| 14 Jun 2000 | Flood | — | — | — | — | — | Forecast zone |
| 18 Feb 2000 | Flood | — | — | — | — | — | Forecast zone |
| 28 Jun 1999 | Flood | — | — | — | 1 | — | Forecast zone |
| 17 May 1999 | Flood | — | — | — | — | — | Forecast zone |
| 12 May 1999 | Flood | — | — | — | — | — | Forecast zone |
| 4 May 1999 | Flood | — | — | — | — | — | Forecast zone |
| 26 Apr 1999 | Flood | — | — | — | — | — | Forecast zone |
| 15 Apr 1999 | Flood | — | — | — | — | — | Forecast zone |
| 8 Mar 1999 | Flood | — | — | — | — | — | Forecast zone |
| 7 Feb 1999 | Flood | — | — | — | — | — | Forecast zone |
| 1 Feb 1999 | Flood | — | — | — | — | — | Forecast zone |
| 31 Jan 1999 | Flood | — | — | — | — | — | Forecast zone |
| 7 Dec 1998 | Flood | — | — | — | — | — | Forecast zone |
| 1 Nov 1998 | Flood | — | — | — | — | — | Forecast zone |
| 17 Oct 1998 | Flood | — | — | — | — | — | Forecast zone |
| 4 Oct 1998 | Flood | — | — | — | — | — | Forecast zone |
| 14 Sep 1998 | Flood | — | — | — | — | — | Forecast zone |
| 30 Jul 1998 | Flood | — | — | — | — | — | County |
| 29 Jul 1998 | Flood | — | — | — | — | — | Forecast zone |
| 22 Jun 1998 | Flood | — | — | — | — | — | Forecast zone |
| 8 Jun 1998 | Flood | — | — | — | — | — | Forecast zone |
| 28 Apr 1998 | Flood | — | — | — | — | — | Forecast zone |
| 1 Apr 1998 | Flood | — | — | — | — | — | Forecast zone |
| 31 Mar 1998 | Flood | — | — | — | — | — | Forecast zone |
| 17 Mar 1998 | Flood | — | — | — | — | — | Forecast zone |
| 8 Mar 1998 | Flood | — | — | — | — | — | Forecast zone |
| 11 Feb 1998 | Flood | — | — | — | — | — | Forecast zone |
| 6 Jan 1998 | Flood | — | — | — | — | — | Forecast zone |
| 27 May 1997 | Flood | — | — | — | — | — | Forecast zone |
| 11 Apr 1997 | Flood | — | — | — | — | — | Forecast zone |
| 26 Feb 1997 | Flood | — | — | — | — | — | Forecast zone |
| 21 Feb 1997 | Flood | — | — | — | — | — | Forecast zone |
| 17 Nov 1996 | Flood | — | — | — | — | — | Forecast zone |
| 23 Sep 1996 | Flood | — | — | — | — | — | Forecast zone |
| 16 Sep 1996 | Flood | — | — | — | — | — | Forecast zone |
| 21 Jul 1996 | Flood | — | — | — | — | — | Forecast zone |
| 20 Jul 1996 | Flash Flood | — | — | — | — | — | County |
| 6 Jun 1996 | Flood | — | — | — | — | — | Forecast zone |
| 27 May 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Johnson County had?
141 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?
30 Jul 2020 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Johnson County?
NCEI records no damage estimate for events of this type in the county.
How does Johnson County compare with Missouri for flood?
17.0 events per 100 square miles against 15.7 statewide; the county holds 141 of the state's 10,821 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.