Hurricane Frederic tidal floods of September 12–13, 1979, along the Gulf Coast, Gulf Breeze-Fort Barrancas quadrangles, Florida

Shown on the Gulf Breeze-Fort Barrancas topographic map are floodmark elevations and approximate areas flooded by Hurricane Frederic tides of September 12-13, 1979, along the shores of Big Lagoon, Pensacola Bay, Santa Rosa Sound, and the Gulf of Mexico from Seaglades eastward to Pensacola Beach, Florida. The still water elevations ranged from about 5 feet above National Geodetic Vertical Datum in sheltered areas to about 7.5 feet in areas subject to wind setup. Storm-tide frequency and records of annual maximum tides at Mobile, Alabama, since 1772, are presented. Offshore winds reached about 160 miles per hour. A wind-velocity of about 145 miles per hour was recorded near Dauphin Island, Alabama.