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Flood in Grant County, North Dakota
10 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.
Grant County, North Dakota, has 10 flood events in the NCEI record since 1950, with at least one in 6 different years.
June is the busiest month, with 4 of the recorded events. The last 20 years account for 6 events against 4 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.8% 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 | Grant County | North Dakota | US |
|---|---|---|---|
| Flood events since 1950 | 10 | 1,221 | 183,559 |
| Per 100 square miles | 0.6 | 1.8 | 5.2 |
| Per 10,000 residents | 43.0 | 15.8 | 5.5 |
| Deaths recorded | 0 | 16 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
0Feb
0Mar
2Apr
1May
0Jun
4Jul
3Aug
0Sep
0Oct
0Nov
0Dec
0
Recorded events
All 10 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 |
|---|---|---|---|---|---|---|---|
| 8 Jun 2021 | Flash Flood | — | $150K | — | — | — | County |
| 12 Jun 2011 | Flash Flood | — | $75K | — | — | — | County |
| 12 Jun 2011 | Flash Flood | — | $50K | — | — | — | County |
| 1 Apr 2009 | Flood | — | $100K | — | — | — | County |
| 6 Mar 2009 | Flood | — | $342K | — | — | — | County |
| 6 Jun 2007 | Flood | — | $25K | — | — | — | County |
| 27 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 26 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 26 Jul 2001 | Flood | — | — | — | — | — | County |
| 21 Mar 1997 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Grant County had?
10 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 Grant County?
8 Jun 2021 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Grant County?
The flood of 6 Mar 2009, with property damage estimated by NCEI at $342K.
How does Grant County compare with North Dakota for flood?
0.6 events per 100 square miles against 1.8 statewide; the county holds 10 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.