Coastal Flood in Coastal Nassau, Florida

Moderate tidal flooding impacted Nassau county along the coast and inland tributaries including the Amelia River and Nassau River. On 10/10 at 12:18 pm, the public reported that North Front Street was inundated with tidal flooding and significant beach erosion had occurred along Fernandina Beach. The Atlantic Coast at Fernandina Beach tide gauge (FRDF1) measured 2.88 ft MHHW during high tide. Moderate tidal flooding begins at 2.5 ft MHHW at this location and minor begins at 2 ft MHHW. On 10/10, the tide gauge at the Amelia River public boat ramp (AMRF1) reach moderate flood stage with 2.65 ft MHHW at 12:12 pm with high tide. The Nassau River at Tisonia peaked in minor flood stage at 2.10 ft MHHW on 10/10 at 2:15 pm. On 10/11, tidal flooding impacted the Fernandina Beach marina.

An extended duration local nor'easter wind event developed October 9th and persisted through the 12th between high pressure wedging down the SE US coast and a sharpening coastal trough axis over the local coastal waters. Gusty winds of 40-51 mph impacted coastal areas, with the strongest winds from 10/9 in the afternoon through 10/10 in the evening along the Duval county coast of 51 mph. Tidal flooding reached moderate levels along the coast, Intracoastal Waterway and inland within the St. Johns River and its tributaries 10/10 through 10/12. This inundation flooded roads and surrounded some vulnerable homes with flood water around high tides. Waves of showers moved onshore with localized flooding rainfall.