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Tornado History

Iroquois Tornado History

This county-level tornado history page focuses on Iroquois, Illinois. The records below identify 56 tornadoes from 1954 through 2025, including a highest listed rating of F3 (Severe damage). NOAA damage estimates in this group total at least $9.2M, with 0 deaths and 11 injuries recorded across the listed events.

Key Tornado Statistics

Total Tornadoes56
Total Deaths0
Total Injuries11
Property Damage$9.2M
Avg Length2.7 mi
Avg Width99 yd

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Key Tornado Facts for Iroquois, Illinois

Top local patterns from the historical tornado records in this group.

Average 0.8 tornadoes per year (1.6/yr in last decade)
June is the peak tornado month with 14 recorded events
Deadliest tornado: F2 in Iroquois, Illinois with 0 deaths
2025 was the most active year with 7 tornadoes
The 2020s had the most tornado activity (12 events)
Longest tornado: 24.2 miles in Iroquois, Illinois
Widest tornado: 500.0 yards in Iroquois, Illinois
Most tornadoes in one day: 4 on Dec 28, 2025

Monthly Distribution

Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.

January
February
March
April
May
June
July
August
September
October
November
December

Summary: In Iroquois, Illinois, June is the most active month with 14 tornadoes.

Annual Tornado Trend

Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.

7530

Summary: 2025 was the most active year with 7 recorded tornadoes.

Tornado Intensity Distribution

Shows the breakdown of tornadoes by EF/F rating.

F0
EF0
F1
EF1
F2
F3
EFU

Summary: F0 tornadoes are the most common in this group, with 14 recorded events.

Property Damage Trends

Visualizes reported property damage over time. Bars use a log-like scale so very large damage years do not flatten the rest of the chart.

$2.8M$275K$28K$0

Summary: The highest reported property damage year in this group is 1990 with at least $2.8M in NOAA-listed property damage.

Historical Track Sketch

F3 May 15, 19681968F3 March 6, 19561956F2 May 31, 19541954F2 June 22, 19901990F2 June 17, 19921992F2 May 21, 19561956F2 September 14, 19651965F2 March 31, 19731973F2 May 24, 19751975F2 April 23, 19761976F2 April 23, 19761976F1 October 3, 19901990F1 March 22, 19911991F1 July 14, 19791979EF1 August 19, 2009F1 April 26, 1994F1 July 15, 1987F1 June 17, 1992EF1 May 6, 2012F1 February 16, 2006F1 June 27, 1995F1 May 26, 1959F1 December 4, 1973EF1 June 22, 2016EF1 June 22, 2016EF1 June 25, 2021EF1 March 31, 2023EF1 March 31, 2023EF1 April 2, 2025EF1 December 28, 2025EF0 November 17, 2013F0 May 13, 1995F0 August 27, 1965F0 June 10, 1961F0 June 20, 1974F0 June 20, 1974F0 May 24, 1980F0 May 16, 1982F0 June 12, 1999F0 May 18, 2000F0 May 26, 2001F0 April 20, 2004F0 April 16, 2006F0 April 16, 2006F0 April 16, 2006EF0 June 21, 2010EF0 November 17, 2013EF0 April 2, 2025EF0 December 28, 2025EF0 December 28, 2025EFU July 21, 2019EFU June 30, 2019EFU June 9, 2020EFU October 3, 2021EFU May 14, 2025EFU December 28, 2025© OpenStreetMap contributors

Notable Tornado Records

The table highlights the strongest and most damaging records in this page's local dataset. Damage totals are NOAA-reported minimum estimates where available.

DateRatingAreaLengthWidthDeathsInjuriesMin. property damage
May 15, 1968F3Iroquois, Illinois7.1 mi400 yd00$2.5M
March 6, 1956F3Iroquois, Illinois9.4 mi500 yd06$250K
May 31, 1954F2Iroquois, Illinois24.2 mi400 yd02$250K
June 22, 1990F2Iroquois, Illinois2 mi100 yd00$250K
June 17, 1992F2Iroquois, Illinois0.1 mi20 yd01$250K
May 21, 1956F2Iroquois, Illinois2 mi70 yd00$25K
September 14, 1965F2Iroquois, Illinois1 mi50 yd02$25K
March 31, 1973F2Iroquois, Illinois0 mi33 yd00$25K
May 24, 1975F2Iroquois, Illinois0.1 mi10 yd00$25K
April 23, 1976F2Iroquois, Illinois0 mi67 yd00$25K
April 23, 1976F2Iroquois, Illinois0 mi33 yd00$25K
October 3, 1990F1Iroquois, Illinois0.5 mi100 yd00$2.5M

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Source And Limits

Data source: NOAA/NCEI. TornadoTrace summarizes historical records for screening and research. Coordinates, damage estimates, narratives, and event details can be approximate, incomplete, revised, or missing. Do not use this page as legal, insurance, engineering, real estate, emergency management, or safety advice.