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Marine Thunderstorm Wind · Atlantic North

Marine Thunderstorm Wind October 7, 2020 · Cape Elizabeth Me To Merrimack River Ma Out 25 Nm, Atlantic North

60 mph
Measured gust (52 kt)

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

What the National Weather Service wrote

A C-MAN Station on the Isle of Shoals reported a wind gust of 60 mph when the thunderstorm outflow passed over the island.

The wider storm

A potent short wave trough crossed the region as it rounded the base of a long wave trough centered north over Hudson Bay. A powerful 150+ kt jet aloft provided more than enough dynamic support for the development of organized convection, with a surface low deepening as it tracked eastward across southern Quebec. An anomalous warm and moist airmass for October allowed temperatures to reach near 70 across southern New Hampshire. An organized squall line developed across New York and quickly tracked across southern New England with southern New Hampshire being on the northern edge of this damaging derecho squall line. Gusty winds associated with this squall line reached the New Hampshire Seacoast by early evening.

Began near Isle of Shoals (42.9760, -70.6133).

Source: NOAA Storm Events Database, event 926887. Narratives are written by the National Weather Service forecast office that issued the report.

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