Thunderstorm Wind — Merrimack, New Hampshire

2025-09-06 · near West Henniker, Merrimack, New Hampshire

Event narrative

Severe thunderstorm wind gusts downed trees and wires on west side of Henniker.

Wider weather episode

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.

View location on OpenStreetMap → (43.1500, -71.8700)

Source: NOAA Storm Events Database, event_id 1295879. Narrative written by the NWS forecast office that issued the report.