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Marine Thunderstorm Wind · Atlantic South

Marine Thunderstorm Wind August 1, 2025 · Charleston Harbor, Atlantic South

46 mph

Measured gust (40 kt)

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

What the National Weather Service wrote

The Weatherflow sensor at Fort Sumter Range Front Light measured wind gusts of at least 34 knots between 935 PM and 945 PM with a peak wind gust of 40 knots at 940 PM.

The wider storm

A weak warm front passing across the area encountered deep moisture, warm temperatures and large downdraft CAPE, favoring strong to severe thunderstorms across coastal waters.

Began near Fort Sumter (32.7512, -79.8707).

Source: NOAA Storm Events Database, event 1291068. Narratives are written by the National Weather Service forecast office that issued the report.

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