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Marine Thunderstorm Wind · Atlantic South

Marine Thunderstorm Wind May 17, 2023 · Fernandina Beach To St Augustine Fl 20 To 60nm, Atlantic South

55 mph
Measured gust (48 kt)

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

What the National Weather Service wrote

The AWOS at Naval Station Mayport measured a wind gust of 55 mph.

The wider storm

An upper-level trough was across the eastern US with unsettled SW steering flow over the local forecast area. An old outflow boundary from prior convection moved across NE FL through the afternoon, which combined with sea breeze forcing and diurnal instability triggered a few strong to severe storms. Stronger dynamics (effective shear of 20-25 kts) and seasonably cool 500 mb temps (-10 degC) were across SE GA, but drier low-level air limited low-level instability and only enabled a few strong to isolated severe storms to develop in the late afternoon and into the evening near boundary merger.

Began near Jacksonville Beach (30.3800, -81.4200).

Source: NOAA Storm Events Database, event 1098166. Narratives are written by the National Weather Service forecast office that issued the report.

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