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Flood in Griggs County, North Dakota
20 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 20 flood events in Griggs County, North Dakota, between 1950 and 2026, spread over 9 years.
April is the busiest month, with 8 of the recorded events. The last 20 years account for 8 events against 12 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.6% of the 1,221 flood events recorded in North Dakota; its 2.8 per 100 square miles compares with 1.8 statewide.
Compared with North Dakota
| Measure | Griggs County | North Dakota | US |
|---|---|---|---|
| Flood events since 1950 | 20 | 1,221 | 183,559 |
| Per 100 square miles | 2.8 | 1.8 | 5.2 |
| Per 10,000 residents | 87.7 | 15.8 | 5.5 |
| Deaths recorded | 0 | 16 | 2,961 |
| Busiest month | April | June | June |
By year
Seasonality
0Feb
0Mar
3Apr
8May
2Jun
3Jul
2Aug
2Sep
0Oct
0Nov
0Dec
0
Recorded events
All 20 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 |
|---|---|---|---|---|---|---|---|
| 1 Aug 2011 | Flash Flood | — | $25K | $50K | — | — | County |
| 1 Aug 2011 | Flood | — | $10K | $20K | — | — | County |
| 10 Apr 2011 | Flood | — | — | — | — | — | County |
| 23 May 2010 | Flash Flood | — | $5K | $50K | — | — | County |
| 18 Mar 2010 | Flood | — | — | — | — | — | County |
| 6 Apr 2009 | Flood | — | $5K | — | — | — | County |
| 22 Mar 2009 | Flood | — | $5K | — | — | — | County |
| 18 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 28 Apr 2006 | Flash Flood | — | — | — | — | — | County |
| 1 Jun 2004 | Flood | — | — | — | — | — | Forecast zone |
| 31 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 1 Apr 2004 | Flood | — | — | — | — | — | Forecast zone |
| 27 Mar 2004 | Flood | — | — | — | — | — | Forecast zone |
| 31 Jul 2001 | Flash Flood | — | $5K | — | — | — | County |
| 17 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 1 Apr 2001 | Flood | — | $250K | — | — | — | Forecast zone |
| 13 Jun 2000 | Flash Flood | — | — | — | — | — | County |
| 10 Apr 1996 | Flood | — | — | — | — | — | Forecast zone |
| 10 Apr 1996 | Flood | — | — | — | — | — | Forecast zone |
| 10 Apr 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Griggs County had?
20 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 Griggs County?
1 Aug 2011 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Griggs County?
The flood of 1 Apr 2001, with property damage estimated by NCEI at $250K.
How does Griggs County compare with North Dakota for flood?
2.8 events per 100 square miles against 1.8 statewide; the county holds 20 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.