Tornado History

Harrison Tornado History

This county-level tornado history page focuses on Harrison, Iowa. The records below identify 34 tornadoes from 1967 through 2026, including a highest listed rating of F3 (Severe damage). NOAA damage estimates in this group total at least $4.9M, with 2 deaths and 18 injuries recorded across the listed events.

Key Tornado Statistics

Total Tornadoes34
Total Deaths2
Total Injuries18
Property Damage$4.9M
Avg Length4.6 mi
Avg Width181 yd

Key Tornado Facts for Harrison, Iowa

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

Average 0.6 tornadoes per year (1.3/yr in last decade)
June is the peak tornado month with 11 recorded events
Deadliest tornado: F3 in Harrison, Iowa with 2 deaths
2024 was the most active year with 7 tornadoes
The 2020s had the most tornado activity (11 events)
Longest tornado: 19 miles in Harrison, Iowa
Widest tornado: 1,000.0 yards in Harrison, Iowa
Most tornadoes in one day: 6 on Apr 26, 2024

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 Harrison, Iowa, June is the most active month with 11 tornadoes.

Annual Tornado Trend

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

7530

Summary: 2024 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
EF2
F3
Unknown
EFU

Summary: EF1 tornadoes are the most common in this group, with 8 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.

$2.5M$250K$25K$0

Summary: The highest reported property damage year in this group is 1992 with at least $2.5M in NOAA-listed property damage.

Historical Track Sketch

F3 June 16, 19921992F3 May 16, 19991999F3 May 16, 19991999F2 May 6, 19831983F2 September 12, 19721972EF2 June 11, 20082008EF2 March 23, 20092009EF2 July 12, 20232023F1 June 13, 20002000F1 May 29, 19801980F1 June 17, 19841984F1 April 29, 19911991EF1 March 22, 20112011EF1 April 12, 20222022EF1 May 24, 2024EF1 April 26, 2024EF1 April 26, 2024EF1 April 26, 2024EF1 April 26, 2024EF1 April 23, 2026F0 June 17, 1984F0 June 12, 1987F0 June 14, 1991F0 May 16, 1992F0 June 18, 2001F0 April 17, 2002F0 May 22, 2004EF0 June 26, 2011EF0 June 29, 2016EF0 April 12, 2022EF0 April 26, 2024EF0 April 26, 2024Unknown June 20, 1967EFU September 24, 2019© OpenStreetMap contributors
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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
June 16, 1992F3Harrison, Iowa19 mi200 yd00$2.5M
May 16, 1999F3Harrison, Iowa7.5 mi440 yd216$1.9M
May 16, 1999F3Harrison, Iowa6.2 mi200 yd00$100K
May 6, 1983F2Harrison, Iowa15 mi20 yd00$250K
September 12, 1972F2Harrison, Iowa5.9 mi100 yd00$25K
June 11, 2008EF2Harrison, Iowa5.47 mi440 yd00N/A
March 23, 2009EF2Harrison, Iowa8.6 mi440 yd00N/A
July 12, 2023EF2Harrison, Iowa9.4 mi100 yd00N/A
June 13, 2000F1Harrison, Iowa10 mi250 yd00$30K
May 29, 1980F1Harrison, Iowa1 mi30 yd00$25K
June 17, 1984F1Harrison, Iowa7 mi30 yd00$25K
April 29, 1991F1Harrison, Iowa1 mi40 yd00$2K
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Source And Limits

Data sourced from NOAA Storm Prediction Center and the NCEI Storm Events Database. TornadoTrace summarizes reported weather events for screening and research; it is not a damage assessment, inspection, or insurance determination. Coordinates and records can be approximate, incomplete, revised, or missing. No warranty of completeness or accuracy.

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