Hurricane Frederic tidal floods of September 12-13, 1979, along the Gulf Coast, Hurricane quadrangle, Alabama

Shown on a topographic map are floodmark elevations and approximate areas flooded by Hurricane Frederic tides of September 12-13, 1979, along the Mobile and Tensaw Rivers in Mobile and Baldwin Counties, Alabama. Most of the inundated areas shown are marshlands or flood plains of small tributary streams. Storm-tides 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. (USGS)