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Marine Thunderstorm Wind · Atlantic South
Marine Thunderstorm Wind May 17, 2023 · Altamaha Sd To Fernandina Beach Fl Out 20nm, Atlantic South
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
The ASOS at the Malcom McKinnon Airport on St. Simons Island measured a wind gust of 48 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 Mckinnon Arpt (31.1500, -81.3800).
Source: NOAA Storm Events Database, event 1098167. Narratives are written by the National Weather Service forecast office that issued the report.
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