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Tornado History

Johnson Tornado History

This county-level tornado history page focuses on Johnson, Iowa. The records below identify 44 tornadoes from 1962 through 2024, including a highest listed rating of F3 (Severe damage). NOAA damage estimates in this group total at least $30.0M, with 1 deaths and 51 injuries recorded across the listed events.

Key Tornado Statistics

Total Tornadoes44
Total Deaths1
Total Injuries51
Property Damage$30.0M
Avg Length5.2 mi
Avg Width143 yd

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Key Tornado Facts for Johnson, Iowa

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

Average 0.7 tornadoes per year (1.3/yr in last decade)
May is the peak tornado month with 14 recorded events
Deadliest tornado: F2 in Johnson, Iowa with 1 deaths
2006 was the most active year with 6 tornadoes
The 2000s had the most tornado activity (10 events)
Longest tornado: 27 miles in Johnson, Iowa
Widest tornado: 800.0 yards in Johnson, Iowa
Most tornadoes in one day: 6 on Apr 13, 2006

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 Johnson, Iowa, May 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.

6420

Summary: 2006 was the most active year with 6 recorded tornadoes.

Tornado Intensity Distribution

Shows the breakdown of tornadoes by EF/F rating.

F0
EF0
F1
EF1
F2
EF2
F3
Unknown

Summary: F1 tornadoes are the most common in this group, with 11 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.

$12.1M$1.2M$121K$0

Summary: The highest reported property damage year in this group is 2006 with at least $12.1M in NOAA-listed property damage.

Historical Track Sketch

F3 May 15, 19981998F2 April 13, 20062006F2 April 21, 19731973F2 June 7, 19841984F2 May 8, 19881988F2 May 8, 19881988F2 May 22, 19621962F2 September 12, 19911991F2 March 22, 19911991EF2 March 31, 20232023EF2 March 31, 20232023EF2 March 31, 20232023F1 June 29, 19831983F1 March 8, 19901990F1 April 13, 2006F1 July 22, 1974F1 April 28, 1974F1 November 9, 1975F1 September 22, 1986F1 April 13, 2006F1 April 13, 2006F1 April 13, 2006F1 April 13, 2006EF1 May 24, 2019EF1 March 31, 2023EF1 May 24, 2024EF1 May 24, 2024EF1 May 24, 2024F0 April 11, 2001EF0 May 25, 2008F0 May 8, 1988F0 May 29, 1991F0 April 23, 1975F0 April 11, 2001F0 April 11, 2001EF0 April 13, 2014EF0 April 27, 2014EF0 July 21, 2017EF0 May 29, 2019EF0 May 23, 2020EF0 March 31, 2023EF0 May 24, 2024Unknown August 15, 1977Unknown August 15, 1977© 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, 1998F3Johnson, Iowa14 mi400 yd017$6.0M
April 13, 2006F2Johnson, Iowa4.5 mi587 yd030$12.0M
April 21, 1973F2Johnson, Iowa6.6 mi33 yd00$2.5M
June 7, 1984F2Johnson, Iowa6 mi200 yd00$2.5M
May 8, 1988F2Johnson, Iowa27 mi60 yd00$2.5M
May 8, 1988F2Johnson, Iowa13 mi60 yd00$2.5M
May 22, 1962F2Johnson, Iowa4.1 mi800 yd10$250K
September 12, 1991F2Johnson, Iowa7 mi70 yd00$250K
March 22, 1991F2Johnson, Iowa4 mi80 yd00$250K
March 31, 2023EF2Johnson, Iowa16.93 mi75 yd02N/A
March 31, 2023EF2Johnson, Iowa14.69 mi100 yd00N/A
March 31, 2023EF2Johnson, Iowa4.19 mi75 yd00N/A

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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.