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Marine Thunderstorm Wind — Fernandina Beach To St Augustine Fl Out 20nm, Atlantic South

2025-05-29 · near Mayport Nas, Fernandina Beach To St Augustine Fl Out 20nm, Atlantic South

56 MG

Magnitude

Event narrative

Weatherflow station near Fort Caroline

reported a peak wind gust of 65 mph as

thunderstorms moved across the area.

Wider weather episode

A mid-level shortwave trough developed an MCS that lifted east- northeastward through the day and across SE GA during peak heating. Continued SW flow increased moisture levels to above average with PWATs mainly in the 1.75-2 inch range. The combination of a moist, moderately unstable airmass and additional lift from the passing shortwave enhanced convection across SE GA and along the sea breeze merger along the Atlantic

coast. SPC had a Slight Risk (level 2 of 5) for SE GA. Strong to locally severe storm occurred during the afternoon into the evening with a confirmed tornado in St. Johns County.

View location on OpenStreetMap → (30.3900, -81.4800)

Source: NOAA Storm Events Database, event_id 1260213. Narrative written by the NWS forecast office that issued the report.