Thunderstorm Wind in Merrimack County, New Hampshire

Thunderstorm Wind September 6, 2025 · Merrimack County, New Hampshire

58 mph

Estimated gust (50 kt)

$2K

Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Severe thunderstorm wind gusts downed a tree down onto wires and house on Deerfield Rd. in Allenstown.

The wider storm

A late summer hot and unstable airmass was in place on the afternoon of September 6th across New Hampshire. A pre-frontal trough ahead of a surface cold front was approaching the state by the afternoon hours. Discrete thunderstorms developed across Central and Southern New Hampshire with most of them remaining below severe strength. A few storms became stronger and were able to produce damaging wind gusts and some large hail.

Began near New Rye (43.1500, -71.3400).

Source: NOAA Storm Events Database, event 1295878. Narratives are written by the National Weather Service forecast office that issued the report.

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