Merrimack County tornado history

7 tornadoes touched Merrimack County, New Hampshire between 1950 and 2025 — about 0.1 a year. The strongest was rated EF2 (Jul 24, 2008). Tornadoes here killed 1 and injured 12 people.

7tornadoes since 1950

EF2strongest rating

1killed · 12 injured

50.5 milongest path · 2008

(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F01

(E)F14

(E)F22

(E)F30

(E)F40

(E)F50

By month

JFMAMJJASOND

Peak month: July.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

Date	Rating	Path	Width	Injured	Killed
Jul 24, 2008	EF2	50.5 mi	880 yd	2	1
Jul 6, 1999	F2	7.5 mi	—	0	0
May 4, 2018	EF1	37.5 mi	300 yd	0	0
Jul 12, 1967	F1	0.5 mi	30 yd	5	0
May 31, 1972	F1	0.1 mi	50 yd	0	0
Aug 15, 1976	F1	0.1 mi	10 yd	5	0
Jul 30, 2015	EF0	0.4 mi	100 yd	0	0

Most recent tornadoes

Date	Rating	Path	Width	Injured	Killed
May 4, 2018	EF1	37.5 mi	300 yd	0	0
Jul 30, 2015	EF0	0.4 mi	100 yd	0	0
Jul 24, 2008	EF2	50.5 mi	880 yd	2	1
Jul 6, 1999	F2	7.5 mi	—	0	0
Aug 15, 1976	F1	0.1 mi	10 yd	5	0
May 31, 1972	F1	0.1 mi	50 yd	0	0
Jul 12, 1967	F1	0.5 mi	30 yd	5	0

Deadliest: Jul 24, 2008, EF2, 1 killed.

Nearby counties

Belknap County, NH12 Hillsborough County, NH20 Sullivan County, NH7 Strafford County, NH7 Rockingham County, NH11 Cheshire County, NH18 Grafton County, NH14 Carroll County, NH9

Questions

How many tornadoes has Merrimack County, New Hampshire had?

7 tornadoes touched Merrimack County, New Hampshire between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.1 per year.

What was the strongest tornado in Merrimack County?

The strongest rating recorded was EF2 on Jul 24, 2008, with a 50.5-mile path and 1 deaths.

When is tornado season in Merrimack County?

Most of its tornadoes happened in July (4 of 7). 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 (2004 onward).