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Tornado in Carroll County, Illinois
23 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 23 tornado events in Carroll County, Illinois, between 1950 and 2026, spread over 19 years.
June is the busiest month, with 8 of the recorded events. The last 20 years account for 9 events against 6 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.6% of the 3,647 tornado events recorded in Illinois; its 5.2 per 100 square miles compares with 6.6 statewide.
By rating: 8 at (E)F0, 9 at (E)F1, 3 at (E)F2, 2 at (E)F3, 0 at (E)F4, 0 at (E)F5 and 1 unrated. Tornadoes before 2007 carry the original Fujita rating.
Compared with Illinois
| Measure | Carroll County | Illinois | US |
|---|---|---|---|
| Tornado events since 1950 | 23 | 3,647 | 81,281 |
| Per 100 square miles | 5.2 | 6.6 | 2.3 |
| Per 10,000 residents | 14.7 | 2.9 | 2.4 |
| Deaths recorded | 0 | 236 | 6,410 |
| Busiest month | June | April | May |
By year
Seasonality
1Feb
0Mar
2Apr
4May
4Jun
8Jul
2Aug
0Sep
2Oct
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 23 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 |
|---|---|---|---|---|---|---|---|
| 2 Apr 2026 | Tornado | EF1 | — | — | — | — | County |
| 15 Jul 2024 | Tornado | EF1 | — | — | — | — | County |
| 31 Mar 2023 | Tornado | EF1 | — | — | — | — | County |
| 31 Mar 2023 | Tornado | EF1 | — | — | — | — | County |
| 23 May 2020 | Tornado | EF unrated | — | — | — | — | County |
| 9 Apr 2015 | Tornado | EF1 | — | — | — | — | County |
| 29 Jun 2014 | Tornado | EF1 | $50K | — | — | — | County |
| 12 Jun 2013 | Tornado | EF2 | — | — | — | 1 | County |
| 19 May 2013 | Tornado | EF0 | — | — | — | — | County |
| 14 Jun 2003 | Tornado | F0 | — | $5K | — | — | County |
| 14 Jun 2003 | Tornado | F0 | — | $5K | — | — | County |
| 14 Jun 2003 | Tornado | F0 | — | $5K | — | — | County |
| 12 May 1999 | Tornado | F0 | — | — | — | — | County |
| 9 May 1995 | Tornado | F3 | $2.0M | — | — | — | County |
| 19 Sep 1988 | Tornado | F0 | $3K | — | — | — | County |
| 29 Apr 1984 | Tornado | F1 | $250K | — | — | — | County |
| 11 Jul 1975 | Tornado | F0 | $250 | — | — | — | County |
| 24 Jan 1967 | Tornado | F3 | $250K | — | — | 12 | County |
| 7 Jun 1961 | Tornado | F0 | — | — | — | — | County |
| 26 Sep 1959 | Tornado | F2 | $25K | — | — | — | County |
| 17 Jun 1956 | Tornado | F1 | $25K | — | — | — | County |
| 18 Apr 1955 | Tornado | F2 | — | — | — | — | County |
| 13 Jun 1950 | Tornado | F1 | $25K | — | — | — | County |
Questions and answers
How many tornado events has Carroll County had?
23 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 Carroll County?
2 Apr 2026 (Tornado, EF1). Records reach NCEI about 120 days after the month ends.
What was the most damaging tornado event recorded in Carroll County?
The tornado of 9 May 1995, with property damage estimated by NCEI at $2.0M.
How does Carroll County compare with Illinois for tornado?
5.2 events per 100 square miles against 6.6 statewide; the county holds 23 of the state's 3,647 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.