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Marine Thunderstorm Wind · Atlantic South

Marine Thunderstorm Wind July 21, 2025 · Fernandina Beach To St Augustine Fl Out 20nm, Atlantic South

44 mph

Measured gust (38 kt)

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

What the National Weather Service wrote

The Mesonet station XLWS Lewis measured a wind

gust of 44 mph.

The wider storm

A surface trough axis across the southeast seaboard states interacted with diurnal instability, very high moisture content and sea breezes to produce scattered to numerous strong to pulse severe storms across the area in the afternoon and evening. Slow storm motion and high moisture with several merging boundaries produced locally heavy rain.

Began near St Augustine Arpt (29.9200, -81.3300).

Source: NOAA Storm Events Database, event 1277632. Narratives are written by the National Weather Service forecast office that issued the report.

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