September 1821 New England tornado outbreak

September 1821 New England tornado outbreak
Meteorological history
Formed	September 9, 1821
Tornado outbreak
Max. rating	F4 tornado
Duration	6 known
Overall effects
Fatalities	8 known

The 1821 New England tornado outbreak was a tornado outbreak that affected the New England states during September 1821. Six destructive tornadoes can be verified from the event.

The first known tornado of the outbreak touched down L'Assomption, Quebec causing minor damage to homes early in the afternoon. Storms then tracked southeast into New England. One supercell caused a weak tornado in Berlin, before producing an F2 tornado in Haverhill. Another cell produced a weak tornado Pittsford, before producing a violent, long track tornado, over south Vermont. The third and final cell produced a violent tornado in Franklin County, Massachusetts.

Known tornadoes

List of confirmed tornadoes — September 9, 1821
F#	Location	County/RCM	Time (UTC)	Path length	Damage
Massachusetts
F4	Northfield,Warwick, Orange	Franklin	2300	>10 miles (16 km)	2 deaths - See article on this tornado - Buildings were completely destroyed in Northfield, Warwick, and North Orange. 30 additional people were injured.
New Hampshire
F1	Haverhill	Grafton	0000	7 miles (11 km)	This storm touched down just south of Haverhill, passed through part of East Haverhill, and destroyed more than 100 acres (40 ha) of forest. A path was said to have been visible for years after the event. A barn was destroyed as well.
F4	Cornish/Croydon areas	Sullivan, Merrimack	0045	>23 miles (37 km)	6 deaths - This tornado, with a path up to 0.5 miles (0.8 km) in width, may have begun in Vermont. There was damage early near Cornish and Croydon as several buildings were destroyed to the ground, and the funnel revealed a multiple-vortex structure as it crossed Lake Sunapee and Mt. Kearsarge. Furniture from a destroyed home was carried for two miles across the lake. Many homes and barns were destroyed in New London, and all 7 homes were completely destroyed in the small settlement of Kearsarge Grove near Warner. This is the deadliest tornado ever recorded in New Hampshire.
Vermont
F0	Berlin	Washington	unknown	unknown	Tree damage near Berlin.
F2	Pittsford	Rutland	unknown	unknown	Possibly related to the above New Hampshire tornado. Buildings in Pittsford and Hubbardton were destroyed. A book was carried for six miles.
Quebec
F0	L'Assomption	L'Assomption	1900	6.5 miles	Three homes were damaged and some crops and trees were scattered. 2 injuries.^[1]
Sources:^[1],^[2], Grazulis (1977)

References

1 2 Ayanami, Blue (2025). Tornadoes of Yesteryear Vol. 1. Google Books.
↑ American Meteorological Society, Monthly Weather Review. Volume 64, Issue 5, May 1936