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Flood in Sumner County, Kansas
75 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.
Sumner County, Kansas, has 75 flood events in the NCEI record since 1950, with at least one in 22 different years.
May is the busiest month, with 25 of the recorded events. The last 20 years account for 55 events against 20 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.6% of the 4,604 flood events recorded in Kansas; its 6.3 per 100 square miles compares with 5.6 statewide.
NCEI attributes 1 death in the county to floods and flash floods.
Compared with Kansas
| Measure | Sumner County | Kansas | US |
|---|---|---|---|
| Flood events since 1950 | 75 | 4,604 | 183,559 |
| Per 100 square miles | 6.3 | 5.6 | 5.2 |
| Per 10,000 residents | 33.5 | 15.7 | 5.5 |
| Deaths recorded | 1 | 32 | 2,961 |
| Busiest month | May | May | June |
By year
Seasonality
0Feb
0Mar
3Apr
5May
25Jun
16Jul
6Aug
7Sep
7Oct
5Nov
1Dec
0
Recorded events
All 75 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 |
|---|---|---|---|---|---|---|---|
| 18 Jun 2026 | Flash Flood | — | — | — | — | — | County |
| 28 Aug 2025 | Flash Flood | — | — | — | — | 6 | County |
| 10 Jul 2020 | Flood | — | — | — | — | — | County |
| 2 Jul 2019 | Flood | — | $100 | $100 | — | — | County |
| 18 Jun 2019 | Flood | — | — | — | — | — | County |
| 27 May 2019 | Flash Flood | — | — | — | — | — | County |
| 26 May 2019 | Flash Flood | — | — | — | — | — | County |
| 26 May 2019 | Flash Flood | — | — | — | — | — | County |
| 8 May 2019 | Flash Flood | — | $100 | $100 | — | — | County |
| 8 May 2019 | Flash Flood | — | $2.0M | $100K | — | — | County |
| 8 May 2019 | Flash Flood | — | $200K | $100 | — | — | County |
| 8 May 2019 | Flash Flood | — | $100 | $100 | — | — | County |
| 8 May 2019 | Flash Flood | — | $100 | $100 | — | — | County |
| 7 May 2019 | Flash Flood | — | $100 | $100 | — | — | County |
| 7 May 2019 | Flash Flood | — | $50K | $100 | — | — | County |
| 7 May 2019 | Flash Flood | — | $50K | $100 | — | — | County |
| 7 May 2019 | Flood | — | $100 | $100 | — | — | County |
| 5 May 2019 | Flood | — | $100 | $100 | — | — | County |
| 8 Oct 2018 | Flood | — | $100 | $100 | — | — | County |
| 11 May 2017 | Flash Flood | — | — | — | — | — | County |
| 9 Sep 2016 | Flash Flood | — | $45K | $100 | — | — | County |
| 9 Sep 2016 | Flood | — | $100 | $100 | — | — | County |
| 27 Apr 2016 | Flood | — | — | — | — | — | County |
| 25 May 2015 | Flood | — | — | — | — | — | County |
| 23 May 2015 | Flood | — | — | — | — | — | County |
| 23 May 2015 | Flood | — | — | — | — | — | County |
| 23 May 2015 | Flood | — | — | — | — | — | County |
| 16 May 2015 | Flood | — | — | — | — | — | County |
| 18 Apr 2015 | Flood | — | — | — | — | — | County |
| 24 Jun 2014 | Flood | — | — | — | — | — | County |
| 9 Aug 2013 | Flood | — | $100 | $100 | — | — | County |
| 9 Aug 2013 | Flood | — | $100 | $100 | — | — | County |
| 17 Aug 2010 | Flood | — | $15K | — | — | 3 | County |
| 23 Jun 2010 | Flood | — | — | — | — | — | County |
| 13 Jun 2010 | Flash Flood | — | $100 | $100 | — | — | County |
| 13 Jun 2010 | Flash Flood | — | $100 | $100 | — | — | County |
| 27 May 2010 | Flood | — | — | — | — | — | County |
| 16 Jul 2009 | Flood | — | — | — | — | — | County |
| 27 Apr 2009 | Flood | — | $200K | — | — | — | County |
| 26 Apr 2009 | Flash Flood | — | — | — | — | — | County |
| 13 Sep 2008 | Flood | — | $10K | $500 | — | — | County |
| 13 Sep 2008 | Flood | — | $10K | $100 | 1 | — | County |
| 12 Sep 2008 | Flash Flood | — | $25K | $10K | — | — | County |
| 12 Sep 2008 | Flash Flood | — | $6K | $2K | — | — | County |
| 12 Sep 2008 | Flash Flood | — | $10K | $5K | — | — | County |
| 27 May 2008 | Flood | — | — | — | — | — | County |
| 26 May 2008 | Flash Flood | — | — | — | — | — | County |
| 26 May 2008 | Flood | — | — | — | — | — | County |
| 26 May 2008 | Flash Flood | — | — | — | — | — | County |
| 4 Jul 2007 | Flash Flood | — | $10K | — | — | — | County |
| 1 Jul 2007 | Flood | — | — | — | — | — | County |
| 30 Jun 2007 | Flood | — | — | — | — | — | County |
| 28 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 30 Mar 2007 | Flood | — | — | — | — | — | County |
| 20 Mar 2007 | Flood | — | — | — | — | — | County |
| 24 Aug 2005 | Flood | — | — | — | — | — | Forecast zone |
| 27 Aug 2004 | Flash Flood | — | — | — | — | — | County |
| 27 Aug 2004 | Flash Flood | — | — | — | — | — | County |
| 23 Apr 2004 | Flash Flood | — | — | — | — | — | County |
| 8 Oct 2003 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2003 | Flash Flood | — | — | — | — | — | County |
| 3 Oct 2002 | Flash Flood | — | — | — | — | — | County |
| 3 Oct 2002 | Flash Flood | — | — | — | — | — | County |
| 12 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2001 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2001 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2001 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2001 | Flash Flood | — | — | — | — | — | County |
| 17 May 2001 | Flash Flood | — | — | — | — | — | County |
| 23 Mar 2000 | Flood | — | — | — | — | — | Forecast zone |
| 1 Jul 1999 | Flash Flood | — | — | — | — | — | County |
| 1 Nov 1998 | Flood | — | $1.0M | — | — | 2 | Forecast zone |
| 31 Oct 1998 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Sumner County had?
75 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 Sumner County?
18 Jun 2026 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Sumner County?
The flash flood of 8 May 2019, with property damage estimated by NCEI at $2.0M and crop damage at $100K.
How does Sumner County compare with Kansas for flood?
6.3 events per 100 square miles against 5.6 statewide; the county holds 75 of the state's 4,604 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.