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Tornado History
Walworth Tornado History
This county-level tornado history page focuses on Walworth, South Dakota. The records below identify 25 tornadoes from 1955 through 2025, including a highest listed rating of F3 (Severe damage). NOAA damage estimates in this group total at least $576K, with 0 deaths and 2 injuries recorded across the listed events.
Key Tornado Statistics
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Check any addressKey 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 12 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 12 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
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 |
| 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 |
| September 14, 2025 | EF1 | Walworth, South Dakota | 3.99 mi | 200 yd | 0 | 0 | N/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.