Thunderstorm Wind in Grafton County, New Hampshire

Thunderstorm Wind June 18, 2026 · Grafton County, New Hampshire

60 mph

Estimated gust (52 kt)

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

What the National Weather Service wrote

Severe thunderstorm outflow winds downed a large tree down across Moss Flower Rd, in Bath.

The wider storm

An unseasonably strong mid-level shortwave trough progressed across Northern New England on June 18th. This brought deep layer shear that allowed for high potential storm structure organization into line segments. The forcing combined with deep moisture allowed for robust convection, with bowing line segments transiting across Central and Southern New Hampshire. Convective wind gusts along with a few areas of microburst wind damage brought down 1000s of trees.

Began near Canaan Street (43.6600, -72.0400).

Source: NOAA Storm Events Database, event 1355786. Narratives are written by the National Weather Service forecast office that issued the report.

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