Grafton County tornado history

14 tornadoes touched Grafton County, New Hampshire between 1950 and 2025 — about 0.2 a year. The strongest was rated F3 (Aug 25, 1969).

14tornadoes since 1950
F3strongest rating
0killed · 0 injured
9.4 milongest path · 2018
(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F05
(E)F16
(E)F22
(E)F31
(E)F40
(E)F50

By month

JFMAMJJASOND

Peak month: July.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

DateRatingPathWidthInjuredKilled
Aug 25, 1969F35.7 mi17 yd00
Aug 11, 1966F29 mi100 yd00
May 11, 1973F20.5 mi150 yd00
Aug 13, 1999F18 mi250 yd00
Jul 21, 1972F17 mi10 yd00
Aug 21, 2011EF12.7 mi350 yd00
Jul 16, 2024EF11.8 mi250 yd00
Jul 21, 1972F10.5 mi10 yd00
Jul 14, 1963F10.1 mi83 yd00
Jun 18, 2018EF09.4 mi25 yd00
Jun 27, 1964F00.5 mi17 yd00
Jul 17, 2012EF00.5 mi30 yd00

Most recent tornadoes

DateRatingPathWidthInjuredKilled
Jul 16, 2024EF11.8 mi250 yd00
Jun 18, 2018EF09.4 mi25 yd00
Jun 18, 2018EF00.2 mi20 yd00
Jul 17, 2012EF00.5 mi30 yd00
Aug 21, 2011EF12.7 mi350 yd00
Aug 13, 1999F18 mi250 yd00
Jun 11, 1973F00.1 mi10 yd00
May 11, 1973F20.5 mi150 yd00
Jul 21, 1972F10.5 mi10 yd00
Jul 21, 1972F17 mi10 yd00
Aug 25, 1969F35.7 mi17 yd00
Aug 11, 1966F29 mi100 yd00

Nearby counties

Orange County, VT3Carroll County, NH9Belknap County, NH12Caledonia County, VT1Sullivan County, NH7Merrimack County, NH7Windsor County, VT4Essex County, VT4

Questions

How many tornadoes has Grafton County, New Hampshire had?

14 tornadoes touched Grafton County, New Hampshire between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.2 per year.

What was the strongest tornado in Grafton County?

The strongest rating recorded was F3 on Aug 25, 1969, with a 5.7-mile path.

When is tornado season in Grafton County?

Most of its tornadoes happened in July (5 of 14). Tornadoes can occur in any month, so keep alerts on year-round.

Right now: live tornado warnings map · alerts for your location. Dates link to that day’s full storm reports where available.