The National Hurricane Center has issued a hurricane watch for the coast of western Louisiana and eastern Texas.
The watch issued Sunday night means that hurricane conditions are possible from Tropical Storm Edouard within the next 24 hours from Intracoastal City to Port O'Connor, Texas.
The fifth named storm of the 2008 hurricane season has sustained maximum winds of about 50 miles per hour.
At 10 p.m. CDT, Edouard was located about 80 miles east-southeast off the mouth of the Mississippi River and about 390 miles east of Galveston, Texas.
It was moving west at 5 mph and was expected to strengthen before making landfall Tuesday morning in Texas.