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Tornado in Warren County, Iowa
48 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.
Warren County, Iowa, has 48 tornado events in the NCEI record since 1950, with at least one in 25 different years.
June is the busiest month, with 19 of the recorded events. The last 20 years account for 20 events against 16 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.4% of the 3,501 tornado events recorded in Iowa; its 8.4 per 100 square miles compares with 6.3 statewide.
By rating: 18 at (E)F0, 18 at (E)F1, 7 at (E)F2, 2 at (E)F3, 0 at (E)F4, 0 at (E)F5 and 3 unrated. Tornadoes before 2007 carry the original Fujita rating.
Compared with Iowa
| Measure | Warren County | Iowa | US |
|---|---|---|---|
| Tornado events since 1950 | 48 | 3,501 | 81,281 |
| Per 100 square miles | 8.4 | 6.3 | 2.3 |
| Per 10,000 residents | 9.0 | 11.0 | 2.4 |
| Deaths recorded | 0 | 100 | 6,410 |
| Busiest month | June | May | May |
By year
Seasonality
0Feb
0Mar
4Apr
7May
11Jun
19Jul
3Aug
3Sep
1Oct
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 48 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 May 2024 | Tornado | EF0 | $2K | — | — | — | County |
| 21 May 2024 | Tornado | EF0 | $30K | — | — | — | County |
| 21 May 2024 | Tornado | EF0 | $10K | — | — | — | County |
| 7 May 2024 | Tornado | EF0 | $50K | — | — | — | County |
| 13 May 2023 | Tornado | EF0 | $500 | — | — | — | County |
| 4 Apr 2023 | Tornado | EF1 | $60K | — | — | — | County |
| 5 Mar 2022 | Tornado | EF2 | $20M | — | — | — | County |
| 20 Aug 2019 | Tornado | EF3 | $350K | $1K | — | — | County |
| 28 Jun 2017 | Tornado | EF1 | $10K | $1K | — | — | County |
| 28 Jun 2017 | Tornado | EF0 | — | — | — | — | County |
| 6 Mar 2017 | Tornado | EF1 | $80K | — | — | — | County |
| 30 Jun 2014 | Tornado | EF1 | $1K | — | — | — | County |
| 14 Apr 2012 | Tornado | EF1 | $200K | — | — | — | County |
| 23 Jul 2010 | Tornado | EF1 | $750K | $10K | — | — | County |
| 23 Jul 2010 | Tornado | EF1 | $250K | $5K | — | — | County |
| 5 Jun 2010 | Tornado | EF0 | — | — | — | — | County |
| 5 Jun 2008 | Tornado | EF1 | $150K | $10K | — | — | County |
| 30 May 2008 | Tornado | EF1 | $30K | $5K | — | — | County |
| 22 Jun 2007 | Tornado | EF1 | $300K | $10K | — | — | County |
| 22 Jun 2007 | Tornado | EF2 | $700K | $15K | — | — | County |
| 2 Apr 2006 | Tornado | F0 | — | — | — | — | County |
| 5 Sep 2004 | Tornado | F0 | — | $1K | — | — | County |
| 24 May 2004 | Tornado | F0 | — | $1K | — | — | County |
| 22 May 2004 | Tornado | F1 | $100K | $5K | — | — | County |
| 25 Jun 2000 | Tornado | F0 | — | $1K | — | — | County |
| 18 May 2000 | Tornado | F1 | $5K | $1K | — | — | County |
| 8 Apr 1999 | Tornado | F2 | $75K | — | — | — | County |
| 8 Apr 1999 | Tornado | F2 | $70K | — | — | — | County |
| 5 Apr 1999 | Tornado | F0 | $1K | — | — | — | County |
| 29 Jun 1998 | Tornado | F0 | — | $500 | — | — | County |
| 29 Jun 1998 | Tornado | F0 | — | $100 | — | — | County |
| 18 Jun 1998 | Tornado | F1 | $5K | $2K | — | — | County |
| 16 Aug 1997 | Tornado | F0 | — | $1K | — | — | County |
| 16 Aug 1997 | Tornado | F0 | $500 | $2K | — | — | County |
| 12 May 1997 | Tornado | F0 | — | — | — | — | County |
| 8 May 1988 | Tornado | F1 | $250K | — | — | — | County |
| 10 Apr 1981 | Tornado | F0 | $3K | — | — | — | County |
| 14 Jun 1980 | Tornado | F1 | $250K | — | — | — | County |
| 14 Jun 1980 | Tornado | F1 | $250K | — | — | — | County |
| 29 Mar 1979 | Tornado | F3 | — | — | — | 1 | County |
| 29 Mar 1979 | Tornado | F2 | $250K | — | — | — | County |
| 12 Jun 1976 | Tornado | F1 | $30 | — | — | — | County |
| 18 Jun 1975 | Tornado | F2 | $3K | — | — | — | County |
| 16 Jul 1969 | Tornado | — | $25K | — | — | — | County |
| 22 Jun 1969 | Tornado | — | — | — | — | — | County |
| 22 Jun 1969 | Tornado | — | $25K | — | — | — | County |
| 16 Jun 1960 | Tornado | F2 | $25K | — | — | — | County |
| 27 Jun 1953 | Tornado | F1 | $25K | — | — | 2 | County |
Questions and answers
How many tornado events has Warren County had?
48 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 Warren County?
24 May 2024 (Tornado, EF0). Records reach NCEI about 120 days after the month ends.
What was the most damaging tornado event recorded in Warren County?
The tornado of 5 Mar 2022, with property damage estimated by NCEI at $20M.
How does Warren County compare with Iowa for tornado?
8.4 events per 100 square miles against 6.3 statewide; the county holds 48 of the state's 3,501 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.