Tornado History
Grafton Tornado History
This county-level tornado history page focuses on Grafton, New Hampshire. The records below identify 14 tornadoes from 1963 through 2024, including a highest listed rating of F2 (Considerable damage). NOAA damage estimates in this group total at least $432K, with 0 deaths and 0 injuries recorded across the listed events.
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Key Tornado Statistics
Key Tornado Facts for Grafton, New Hampshire
Top local patterns from the historical tornado records in this group.
Average 0.2 tornadoes per year (0.3/yr in last decade)
July is the peak tornado month with 5 recorded events
Deadliest tornado: F1 in Grafton, New Hampshire with 0 deaths
1972 was the most active year with 2 tornadoes
The 1960s had the most tornado activity (4 events)
Longest tornado: 9.45 miles in Grafton, New Hampshire
Widest tornado: 350.0 yards in Grafton, New Hampshire
Most tornadoes in one day: 2 on Jul 21, 1972
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In Grafton, New Hampshire, July is the most active month with 5 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 1972 was the most active year with 2 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 1966 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 Grafton, New Hampshire.
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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 |
|---|---|---|---|---|---|---|---|
| August 11, 1966 | F2 | Grafton, New Hampshire | 9 mi | 100 yd | 0 | 0 | $250K |
| May 11, 1973 | F2 | Grafton, New Hampshire | 0.5 mi | 150 yd | 0 | 0 | N/A |
| July 16, 2024 | EF1 | Grafton, New Hampshire | 1.8 mi | 250 yd | 0 | 0 | $80K |
| July 21, 1972 | F1 | Grafton, New Hampshire | 0.5 mi | 7 yd | 0 | 0 | $25K |
| July 21, 1972 | F1 | Grafton, New Hampshire | 7 mi | 10 yd | 0 | 0 | $25K |
| July 14, 1963 | F1 | Grafton, New Hampshire | 0.1 mi | 83 yd | 0 | 0 | $2K |
| August 13, 1999 | F1 | Grafton, New Hampshire | 1 mi | 250 yd | 0 | 0 | N/A |
| August 21, 2011 | EF1 | Grafton, New Hampshire | 2.69 mi | 350 yd | 0 | 0 | N/A |
| June 27, 1964 | F0 | Grafton, New Hampshire | 0.5 mi | 17 yd | 0 | 0 | $25K |
| June 11, 1973 | F0 | Grafton, New Hampshire | 0 mi | 33 yd | 0 | 0 | N/A |
| July 17, 2012 | EF0 | Grafton, New Hampshire | 0.46 mi | 30 yd | 0 | 0 | N/A |
| June 18, 2018 | EF0 | Grafton, New Hampshire | 9.45 mi | 25 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.