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Flood in Dunn County, North Dakota
13 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 13 flood events in Dunn County, North Dakota, between 1950 and 2026, spread over 8 years.
June is the busiest month, with 4 of the recorded events. The last 20 years account for 9 events against 4 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.1% of the 1,221 flood events recorded in North Dakota; its 0.6 per 100 square miles compares with 1.8 statewide.
Compared with North Dakota
| Measure | Dunn County | North Dakota | US |
|---|---|---|---|
| Flood events since 1950 | 13 | 1,221 | 183,559 |
| Per 100 square miles | 0.6 | 1.8 | 5.2 |
| Per 10,000 residents | 32.2 | 15.8 | 5.5 |
| Deaths recorded | 0 | 16 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
0Feb
0Mar
2Apr
1May
1Jun
4Jul
2Aug
3Sep
0Oct
0Nov
0Dec
0
Recorded events
All 13 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 |
|---|---|---|---|---|---|---|---|
| 16 Apr 2023 | Flood | — | $540K | — | — | — | County |
| 28 Jun 2018 | Flash Flood | — | $10K | $25K | — | — | County |
| 15 Aug 2014 | Flood | — | $1.7M | $400K | — | — | County |
| 1 Aug 2011 | Flood | — | — | — | — | — | County |
| 22 Jul 2011 | Flash Flood | — | $10K | — | — | — | County |
| 1 Jul 2011 | Flood | — | — | — | — | — | County |
| 1 Jun 2011 | Flood | — | — | — | — | — | County |
| 11 May 2011 | Flood | — | $50K | — | — | — | County |
| 6 Mar 2009 | Flood | — | $70K | — | — | — | County |
| 29 Jun 2005 | Flash Flood | — | — | — | — | — | County |
| 17 Mar 2003 | Flood | — | — | — | — | — | Forecast zone |
| 21 Aug 2002 | Flash Flood | — | — | — | — | — | County |
| 10 Jun 2002 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Dunn County had?
13 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 Dunn County?
16 Apr 2023 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Dunn County?
The flood of 15 Aug 2014, with property damage estimated by NCEI at $1.7M and crop damage at $400K.
How does Dunn County compare with North Dakota for flood?
0.6 events per 100 square miles against 1.8 statewide; the county holds 13 of the state's 1,221 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.