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Tornado in Mahnomen County, Minnesota
24 tornadoes events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Tornado.
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 24 tornado events in Mahnomen County, Minnesota, between 1950 and 2026, spread over 16 years.
July is the busiest month, with 13 of the recorded events. The last 20 years account for 12 events against 6 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1% of the 2,433 tornado events recorded in Minnesota; its 4.3 per 100 square miles compares with 3.1 statewide.
By rating: 13 at (E)F0, 5 at (E)F1, 4 at (E)F2, 0 at (E)F3, 0 at (E)F4, 0 at (E)F5 and 2 unrated. Tornadoes before 2007 carry the original Fujita rating.
Compared with Minnesota
| Measure | Mahnomen County | Minnesota | US |
|---|---|---|---|
| Tornado events since 1950 | 24 | 2,433 | 81,281 |
| Per 100 square miles | 4.3 | 3.1 | 2.3 |
| Per 10,000 residents | 44.3 | 4.3 | 2.4 |
| Deaths recorded | 0 | 101 | 6,410 |
| Busiest month | July | June | May |
By year
Seasonality
0Feb
0Mar
0Apr
0May
2Jun
8Jul
13Aug
1Sep
0Oct
0Nov
0Dec
0
Magnitude distribution
Enhanced Fujita scale wind estimates
- EF0/F0
- 65–85 mph (EF0)
- EF1/F1
- 86–110 mph (EF1)
- EF2/F2
- 111–135 mph (EF2)
- EF3/F3
- 136–165 mph (EF3)
- EF4/F4
- 166–200 mph (EF4)
- EF5/F5
- over 200 mph (EF5)
- Unrated
- no rating recorded
Tornado rating as recorded (Fujita scale before February 2007, Enhanced Fujita after).
Recorded events
All 24 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 |
|---|---|---|---|---|---|---|---|
| 24 Jun 2023 | Tornado | EF2 | $56K | — | — | — | County |
| 24 Jun 2023 | Tornado | EF unrated | — | — | — | — | County |
| 24 Jun 2023 | Tornado | EF unrated | — | — | — | — | County |
| 24 Jun 2022 | Tornado | EF1 | — | — | — | — | County |
| 24 May 2019 | Tornado | EF0 | — | — | — | — | County |
| 24 May 2019 | Tornado | EF1 | — | — | — | — | County |
| 22 Jun 2015 | Tornado | EF1 | — | — | — | — | County |
| 22 Jul 2013 | Tornado | EF2 | $1.0M | $500K | — | — | County |
| 17 Jun 2010 | Tornado | EF0 | — | — | — | — | County |
| 24 Jul 2008 | Tornado | EF0 | — | $5K | — | — | County |
| 11 Jul 2008 | Tornado | EF0 | $5K | $5K | — | — | County |
| 11 Jul 2008 | Tornado | EF2 | $500K | $100K | — | — | County |
| 11 Aug 2002 | Tornado | F0 | $5K | — | — | — | County |
| 25 Jul 2002 | Tornado | F1 | — | — | — | — | County |
| 25 Jul 1999 | Tornado | F0 | — | — | — | — | County |
| 20 Jul 1998 | Tornado | F0 | $30K | — | — | — | County |
| 20 Jul 1998 | Tornado | F0 | — | — | — | — | County |
| 20 Jul 1998 | Tornado | F0 | — | — | — | — | County |
| 10 Jul 1981 | Tornado | F0 | $30 | — | — | — | County |
| 5 Jul 1978 | Tornado | F2 | — | — | — | — | County |
| 13 Jun 1975 | Tornado | F0 | $25K | — | — | — | County |
| 10 Jul 1972 | Tornado | F0 | $25K | — | — | — | County |
| 26 Jul 1969 | Tornado | F0 | — | — | — | — | County |
| 11 Jun 1966 | Tornado | F1 | $25K | — | — | — | County |
Questions and answers
How many tornado events has Mahnomen County had?
24 events in the NCEI Storm Events record between 1950 and 2026. Reporting of tornadoes became far more complete after 1996, so early decades undercount.
When was the last recorded tornado event in Mahnomen County?
24 Jun 2023 (Tornado, EF unrated). Records reach NCEI about 120 days after the month ends.
What was the most damaging tornado event recorded in Mahnomen County?
The tornado of 22 Jul 2013, with property damage estimated by NCEI at $1.0M and crop damage at $500K.
How does Mahnomen County compare with Minnesota for tornado?
4.3 events per 100 square miles against 3.1 statewide; the county holds 24 of the state's 2,433 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 Tornado hub and the county page.