Hurricane Frederic tidal floods of September 12-13, 1979, along the Gulf Coast, Heron Bay, Little Dauphin Island, Fort Morgan, and Fort Morgan NW quadrangles, Alabama

Shown on a topographic map are floodmark elevations and approximate areas flooded by Hurricane Frederic tides of September 12-13, 1979, along the southeastern tip of Mobile County, including Dauphin Island, Alabama. Nearly all the mainland area shown on the map was inundated by the tidal surge. The Dauphin Island Parkway Bridge (Alabama State Highway 163) was almost totally demolished. 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.