Tornado History
Merrimack Tornado History
This county-level tornado history page focuses on Merrimack, New Hampshire. The records below identify 7 tornadoes from 1967 through 2018, including a highest listed rating of EF2 (Considerable damage). NOAA damage estimates in this group total at least $178K, with 0 deaths and 10 injuries recorded across the listed events.
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Key Tornado Statistics
Key Tornado Facts for Merrimack, New Hampshire
Top local patterns from the historical tornado records in this group.
Average 0.1 tornadoes per year (0.1/yr in last decade)
July is the peak tornado month with 4 recorded events
Deadliest tornado: F1 in Merrimack, New Hampshire with 0 deaths
1967 was the most active year with 1 tornadoes
The 1970s had the most tornado activity (2 events)
Longest tornado: 16.2 miles in Merrimack, New Hampshire
Widest tornado: 880.0 yards in Merrimack, New Hampshire
Most tornadoes in one day: 1 on Jul 12, 1967
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In Merrimack, New Hampshire, July 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: 1967 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 2008 with at least $153K 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 Merrimack, 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 |
|---|---|---|---|---|---|---|---|
| July 24, 2008 | EF2 | Merrimack, New Hampshire | 5.25 mi | 880 yd | 0 | 0 | $153K |
| July 12, 1967 | F1 | Merrimack, New Hampshire | 0.5 mi | 30 yd | 0 | 5 | $25K |
| May 31, 1972 | F1 | Merrimack, New Hampshire | 0.1 mi | 50 yd | 0 | 0 | $250 |
| August 15, 1976 | F1 | Merrimack, New Hampshire | 0 mi | 33 yd | 0 | 5 | N/A |
| July 6, 1999 | F1 | Merrimack, New Hampshire | 1 mi | 75 yd | 0 | 0 | N/A |
| May 4, 2018 | EF1 | Merrimack, New Hampshire | 16.2 mi | 300 yd | 0 | 0 | N/A |
| July 30, 2015 | EF0 | Merrimack, New Hampshire | 0.42 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.