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Tornado History
Grafton Tornado History
This county-level tornado history page focuses on Grafton, New Hampshire. The records below identify 12 tornadoes from 1963 through 2024, including a highest listed rating of F2 (Considerable damage). NOAA damage estimates in this group total at least $382K, with 0 deaths and 0 injuries recorded across the listed events.
Key Tornado Statistics
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Check any addressKey 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)
June is the peak tornado month with 4 recorded events
Deadliest tornado: F1 in Grafton, New Hampshire with 0 deaths
1973 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 Jun 18, 2018
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In Grafton, New Hampshire, June is the most active month with 4 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 1973 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
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 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 |
| June 18, 2018 | EF0 | Grafton, New Hampshire | 0.2 mi | 20 yd | 0 | 0 | N/A |
| August 25, 1969 | Unknown | Grafton, New Hampshire | 5.7 mi | 17 yd | 0 | 0 | $25K |
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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.