Thunderstorm Wind in St. Lawrence County, New York

Thunderstorm Wind June 30, 2026 · St. Lawrence County, New York

58 mph

Estimated gust (50 kt)

$5K

Damage as recorded

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

What the National Weather Service wrote

A few trees down across State Highway 812 and neighboring roads.

The wider storm

Warm frontal boundary approaching and crossing northern NY with increasing heat and humidity during the evening of June 30th. Meanwhile, mid level shortwave disturbances running around the periphery of a building heat ridge caused the development of a mesoscale convective complex that moved across Ontario Canada province into western NY, including portions of the St. Lawrence Valley.

A line of thunderstorms moved across the St. Lawrence valley between 11 pm and midnight producing scattered wind damage in the form of trees and utility lines damaged.

Began near Heuvelton (44.6300, -75.4200).

Source: NOAA Storm Events Database, event 1335971. Narratives are written by the National Weather Service forecast office that issued the report.

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