Tornado History
Johnson Tornado History
This county-level tornado history page focuses on Johnson, Iowa. The records below identify 46 tornadoes from 1962 through 2026, 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.
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Key Tornado Statistics
Key Tornado Facts for Johnson, Iowa
Top local patterns from the historical tornado records in this group.
Average 0.7 tornadoes per year (1.4/yr in last decade)
April is the peak tornado month with 15 recorded events
Deadliest tornado: F2 in Johnson, Iowa with 1 deaths
2006 was the most active year with 6 tornadoes
The 2020s had the most tornado activity (11 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.
Summary: In Johnson, Iowa, April is the most active month with 15 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 2006 was the most active year with 6 recorded tornadoes.
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.
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
This map covers the wider location—not your exact property.Measure the closest recorded track to a street address in or near Johnson, Iowa.
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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.
| Date | Rating | Area | Length | Width | Deaths | Injuries | Min. property damage |
|---|---|---|---|---|---|---|---|
| May 15, 1998 | F3 | Johnson, Iowa | 14 mi | 400 yd | 0 | 17 | $6.0M |
| April 13, 2006 | F2 | Johnson, Iowa | 4.5 mi | 587 yd | 0 | 30 | $12.0M |
| April 21, 1973 | F2 | Johnson, Iowa | 6.6 mi | 33 yd | 0 | 0 | $2.5M |
| June 7, 1984 | F2 | Johnson, Iowa | 6 mi | 200 yd | 0 | 0 | $2.5M |
| May 8, 1988 | F2 | Johnson, Iowa | 27 mi | 60 yd | 0 | 0 | $2.5M |
| May 8, 1988 | F2 | Johnson, Iowa | 13 mi | 60 yd | 0 | 0 | $2.5M |
| May 22, 1962 | F2 | Johnson, Iowa | 4.1 mi | 800 yd | 1 | 0 | $250K |
| September 12, 1991 | F2 | Johnson, Iowa | 7 mi | 70 yd | 0 | 0 | $250K |
| March 22, 1991 | F2 | Johnson, Iowa | 4 mi | 80 yd | 0 | 0 | $250K |
| March 31, 2023 | EF2 | Johnson, Iowa | 16.93 mi | 75 yd | 0 | 2 | N/A |
| March 31, 2023 | EF2 | Johnson, Iowa | 14.69 mi | 100 yd | 0 | 0 | N/A |
| March 31, 2023 | EF2 | Johnson, Iowa | 4.19 mi | 75 yd | 0 | 0 | N/A |
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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.