Tornado History Map

Grafton County, New Hampshire tornado history

15 tornadoes recorded in or across Grafton County from 1963 to 2024, coloured by rating on the map.

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Years1950 to 2025
Rating (F or EF scale)

Shows tornadoes that started in, or crossed, the chosen state. To see how many have passed near you, search a town or ZIP code, or tap the map.

Key
  • F0 / EF0 Light damage
  • F1 / EF1 Moderate damage
  • F2 / EF2 Considerable damage
  • F3 / EF3 Severe damage
  • F4 / EF4 Devastating damage
  • F5 / EF5 Incredible damage
  • Unknown Not rated (2007 onwards)

How to read the lines. Each line is one tornado, drawn from where it started to where it ended, coloured and sized by its rating. A dot means the record has no end point. Tap a line for its details, or tap anywhere else to see how many tornadoes have passed nearby. Weaker tornadoes appear as you zoom in. Ratings use the Fujita (F) scale before 1 February 2007 and the Enhanced Fujita (EF) scale from then on.

Tornadoes in Grafton County

The Storm Prediction Center records 15 tornadoes whose paths touched Grafton County, New Hampshire between 1963 and 2024. None of them is recorded as having killed anyone. The busiest month is July, with 5 tornadoes. The strongest was an F3 on 25 August 1969. The most recent was on 16 July 2024.

  • 15tornadoes
  • 0deaths
  • 0injuries
  • 88per 10,000 sq mi of land

A tornado that crossed several counties counts in each one, so county counts add up to more than the state's.

How strong were the tornadoes in Grafton County?

RatingTornadoesShare
F0 / EF0533%
F1 / EF1747%
F2 / EF2213%
F3 / EF317%
F4 / EF400%
F5 / EF500%
Unknown rating00%

Grafton County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 4 in 1960s.1960s41970s41980s11990s12010s42020s1

The 2020s only run to 2024, so that bar is for a shorter period. The record starts in 1950.

Show the numbers
PeriodCount
1960s4
1970s4
1980s1
1990s1
2010s4
2020s1
Tornadoes by month
Bar chart of tornadoes by period. The most is 5 in Jul.Jan0Feb0Mar0Apr0May2Jun4Jul5Aug4Sep0Oct0Nov0Dec0
Show the numbers
PeriodCount
Jan0
Feb0
Mar0
Apr0
May2
Jun4
Jul5
Aug4
Sep0
Oct0
Nov0
Dec0

Records for Grafton County

  • Strongest: New Hampshire tornado25 August 1969, F3, 5.7 miles long
  • Longest path: New Hampshire tornado18 June 2018, EF0, 9.5 miles long
  • Most recent: New Hampshire tornado16 July 2024, EF1, 1.8 miles long

Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.

More in New Hampshire

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