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EF1 tornado in Grafton County, New Hampshire

Tornado July 16, 2024 · Grafton County, New Hampshire

EF1
Rating
1.8 mi
Path length
250 yd
Path width
$80K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 250 yards (0.14 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

NWS Storm Survey Team confirmed and EF1 tornado touched down in Lyme, NH on the evening of July 16th. The tornado first touched down near Post Pond, downing numerous trees along the western shoreline. Overall path width was narrow at first, approximately 25 yards. The tornado tracked almost due north and crossed Route 10 causing sporadic tree damage. Once the tornado reached Whipple Hill Rd. the circulation become wider in the field areas. Hundreds of trees were

snapped and uprooted through this area along with a garage being picked up and moved 15 feet. Trees also fell onto the roof of a home. The tornado continued to track north up Culver Hill Rd. and remained wide, approximately 200 to 250 yards. Once it reached the top of the hill, tree damage continued to increase in severity as the tornado strengthened. Some roof damage occurred on a few homes as trees and branches fell into homes. The tornado quickly lifted north of Tavern Ln. Overall, approximately 500 to 1000 trees were snapped or uprooted along with minor damage to at least 5 homes.

The wider storm

A large MCS formed across New York state on the afternoon of July 16th. This complex continued to move eastward and held its structure as it reached New Hampshire by early evening. Bowing line segments caused multiple microbursts and high end wind damage. At the north end of the squall line, a bookend vortex developed just north of Hanover, where a tornado briefly touched down, causing damage.

Began near Hanover Center (43.8200, -72.1500).

Source: NOAA Storm Events Database, event 1205498. Narratives are written by the National Weather Service forecast office that issued the report.

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