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Flood in Tripp County, South Dakota
30 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.
Tripp County, South Dakota, has 30 flood events in the NCEI record since 1950, with at least one in 16 different years.
June is the busiest month, with 9 of the recorded events. The last 20 years account for 26 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 1.9 per 100 square miles compares with 4.5 statewide.
Compared with South Dakota
| Measure | Tripp County | South Dakota | US |
|---|---|---|---|
| Flood events since 1950 | 30 | 3,390 | 183,559 |
| Per 100 square miles | 1.9 | 4.5 | 5.2 |
| Per 10,000 residents | 53.9 | 37.9 | 5.5 |
| Deaths recorded | 0 | 10 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
0Feb
2Mar
6Apr
0May
8Jun
9Jul
3Aug
1Sep
1Oct
0Nov
0Dec
0
Recorded events
All 30 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 |
|---|---|---|---|---|---|---|---|
| 20 Jun 2024 | Flash Flood | — | $30K | — | — | — | County |
| 20 Jun 2024 | Flood | — | $1K | — | — | — | County |
| 22 Jun 2023 | Flash Flood | — | — | — | — | — | County |
| 10 Aug 2019 | Flash Flood | — | — | — | — | — | County |
| 7 Jul 2019 | Flood | — | — | — | — | — | County |
| 1 Jun 2019 | Flood | — | — | — | — | — | County |
| 27 May 2019 | Flood | — | — | — | — | — | County |
| 24 May 2019 | Flood | — | — | — | — | — | County |
| 21 May 2019 | Flood | — | — | — | — | — | County |
| 20 Mar 2019 | Flood | — | — | — | — | — | County |
| 14 Mar 2019 | Flood | — | — | — | — | — | County |
| 21 Jun 2018 | Flood | — | — | — | — | — | County |
| 22 May 2016 | Flash Flood | — | $10K | — | — | — | County |
| 22 May 2016 | Flood | — | — | — | — | — | County |
| 23 Sep 2015 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2015 | Flash Flood | — | $1K | — | — | — | County |
| 12 Mar 2014 | Flood | — | — | — | — | — | County |
| 14 Jul 2013 | Flood | — | $10K | — | — | — | County |
| 22 Jun 2011 | Flood | — | — | — | — | — | County |
| 12 Mar 2011 | Flood | — | — | — | — | — | County |
| 2 Mar 2011 | Flood | — | — | — | — | — | County |
| 16 Feb 2011 | Flood | — | — | — | — | — | County |
| 8 Mar 2010 | Flood | — | — | — | — | — | County |
| 10 Feb 2009 | Flood | — | — | — | — | — | County |
| 5 Jun 2008 | Flood | — | — | — | — | — | County |
| 5 Jun 2008 | Flash Flood | — | $250K | — | — | — | County |
| 13 May 2005 | Flood | — | — | — | — | — | Forecast zone |
| 8 Jun 2004 | Flash Flood | — | $200K | — | — | — | County |
| 9 May 1999 | Flash Flood | — | — | — | — | — | County |
| 28 May 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Tripp County had?
30 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 Tripp County?
20 Jun 2024 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Tripp County?
The flash flood of 5 Jun 2008, with property damage estimated by NCEI at $250K.
How does Tripp County compare with South Dakota for flood?
1.9 events per 100 square miles against 4.5 statewide; the county holds 30 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.