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Flood in Jackson County, South Dakota
31 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.
Jackson County, South Dakota, has 31 flood events in the NCEI record since 1950, with at least one in 14 different years.
May is the busiest month, with 10 of the recorded events. The last 20 years account for 27 events against 4 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.9% of the 3,390 flood events recorded in South Dakota; its 1.7 per 100 square miles compares with 4.5 statewide.
Compared with South Dakota
| Measure | Jackson County | South Dakota | US |
|---|---|---|---|
| Flood events since 1950 | 31 | 3,390 | 183,559 |
| Per 100 square miles | 1.7 | 4.5 | 5.2 |
| Per 10,000 residents | 107.7 | 37.9 | 5.5 |
| Deaths recorded | 0 | 10 | 2,961 |
| Busiest month | May | June | June |
By year
Seasonality
0Feb
0Mar
3Apr
0May
10Jun
10Jul
6Aug
1Sep
0Oct
1Nov
0Dec
0
Recorded events
All 31 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 |
|---|---|---|---|---|---|---|---|
| 2 Jun 2026 | Flash Flood | — | — | — | — | — | County |
| 13 Oct 2023 | Flood | — | — | — | — | — | County |
| 12 May 2023 | Flood | — | — | — | — | — | County |
| 29 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 6 Jul 2019 | Flood | — | — | — | — | — | County |
| 5 Jul 2019 | Flood | — | — | — | — | — | County |
| 27 May 2019 | Flood | — | — | — | — | — | County |
| 21 May 2019 | Flood | — | $200K | — | — | — | County |
| 18 Mar 2019 | Flood | — | $250K | — | — | — | County |
| 22 Jun 2018 | Flash Flood | — | — | — | — | — | County |
| 20 Jun 2018 | Flood | — | — | — | — | — | County |
| 8 Jun 2018 | Flash Flood | — | — | — | — | — | County |
| 2 Jul 2016 | Flood | — | — | — | — | — | County |
| 4 Jun 2015 | Flood | — | — | — | — | — | County |
| 25 May 2015 | Flood | — | — | — | — | — | County |
| 17 May 2015 | Flood | — | — | — | — | — | County |
| 17 May 2015 | Flood | — | — | — | — | — | County |
| 16 May 2015 | Flood | — | — | — | — | — | County |
| 16 Jun 2014 | Flood | — | — | — | — | — | County |
| 6 Jul 2011 | Flash Flood | — | $5K | — | — | — | County |
| 6 Jul 2011 | Flash Flood | — | $10K | — | — | — | County |
| 24 Jun 2011 | Flash Flood | — | $20K | — | — | — | County |
| 21 May 2011 | Flood | — | — | — | — | — | County |
| 12 Mar 2011 | Flood | — | $5K | — | — | — | County |
| 4 Mar 2010 | Flood | — | — | — | — | — | County |
| 5 Jun 2008 | Flood | — | $500K | — | — | — | County |
| 23 May 2008 | Flood | — | — | — | — | — | County |
| 5 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 2 Aug 1997 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 1997 | Flash Flood | — | — | — | — | — | County |
| 28 May 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Jackson County had?
31 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 Jackson County?
2 Jun 2026 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Jackson County?
The flood of 5 Jun 2008, with property damage estimated by NCEI at $500K.
How does Jackson County compare with South Dakota for flood?
1.7 events per 100 square miles against 4.5 statewide; the county holds 31 of the state's 3,390 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.