Tornado History
Keystone Tornado History
This location page summarizes tornado records that list Keystone, Iowa as a begin or end location. The dataset includes 2 matching records from 2001 through 2025. The strongest matching rating is EF1 (Moderate damage), the latest matching tornado is July 11, 2025, and minimum reported property damage totals N/A.
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Key Tornado Statistics
Key Tornado Facts for Keystone, Iowa
Top local patterns from the historical tornado records in this group.
Average 0.1 tornadoes per year (0.1/yr in last decade)
April is the peak tornado month with 1 recorded events
Deadliest tornado: F0 in Keystone, Iowa with 0 deaths
2001 was the most active year with 1 tornadoes
The 2000s had the most tornado activity (1 events)
Longest tornado: 3.8 miles in Keystone, Iowa
Widest tornado: 20.0 yards in Keystone, Iowa
Most tornadoes in one day: 1 on Apr 8, 2001
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In Keystone, Iowa, April is the most active month with 1 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 2001 was the most active year with 1 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 2001 with at least N/A 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 Keystone, 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 |
|---|---|---|---|---|---|---|---|
| July 11, 2025 | EF1 | Benton, Iowa | 3.8 mi | 20 yd | 0 | 0 | N/A |
| April 8, 2001 | F0 | Benton, Iowa | 0.1 mi | 10 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.