Tornado History
Walworth Tornado History
This county-level tornado history page focuses on Walworth, South Dakota. The records below identify 26 tornadoes from 1955 through 2025, including a highest listed rating of F3 (Severe damage). NOAA damage estimates in this group total at least $578K, with 0 deaths and 2 injuries recorded across the listed events.
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Key Tornado Statistics
Key Tornado Facts for Walworth, South Dakota
Top local patterns from the historical tornado records in this group.
Average 0.4 tornadoes per year (0.2/yr in last decade)
June is the peak tornado month with 13 recorded events
Deadliest tornado: F1 in Walworth, South Dakota with 0 deaths
2007 was the most active year with 5 tornadoes
The 2000s had the most tornado activity (6 events)
Longest tornado: 21.9 miles in Walworth, South Dakota
Widest tornado: 600.0 yards in Walworth, South Dakota
Most tornadoes in one day: 4 on Jun 17, 2007
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In Walworth, South Dakota, June is the most active month with 13 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 2007 was the most active year with 5 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 1961 with at least $250K 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 Walworth, South Dakota.
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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 |
|---|---|---|---|---|---|---|---|
| June 20, 1968 | F3 | Walworth, South Dakota | 8.8 mi | 200 yd | 0 | 0 | N/A |
| June 20, 1968 | F3 | Walworth, South Dakota | 0 mi | 33 yd | 0 | 0 | N/A |
| June 28, 1961 | F2 | Walworth, South Dakota | 1 mi | 33 yd | 0 | 0 | $250K |
| July 3, 1959 | F2 | Walworth, South Dakota | 0 mi | 33 yd | 0 | 0 | $25K |
| June 18, 1964 | F2 | Walworth, South Dakota | 21.9 mi | 200 yd | 0 | 2 | $25K |
| May 22, 2010 | EF2 | Walworth, South Dakota | 1.84 mi | 600 yd | 0 | 0 | N/A |
| July 29, 1970 | F1 | Walworth, South Dakota | 0.5 mi | 50 yd | 0 | 0 | $25K |
| June 9, 1971 | F1 | Walworth, South Dakota | 0 mi | 33 yd | 0 | 0 | $2K |
| April 19, 1955 | F1 | Walworth, South Dakota | 4.6 mi | 33 yd | 0 | 0 | $250 |
| August 6, 1986 | F1 | Walworth, South Dakota | 1.5 mi | 40 yd | 0 | 0 | $250 |
| August 18, 1973 | F1 | Walworth, South Dakota | 0.4 mi | 7 yd | 0 | 0 | N/A |
| May 22, 2010 | EF1 | Walworth, South Dakota | 0.5 mi | 100 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.