Sep 19, 2020
The first strong onshore flow event of the season developed between strong high pressure building across the Mid-West toward New England and a frontal boundary SE of the area. Winds increased through the day as the pressure gradient strengthened. Sustained gradient winds and wind gusts were between 20-30 mph with gusts 30-40 mph, and a Wind Advisory was in effect for coastal counties. Waves of locally heavy rainfall moved onshore. A coastal flood warning was in place due to the stronger NE wind
Source: NOAA National Weather Service Storm Events Database (event 921592). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Coastal St. Johns County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.