2012's first Atlantic storm strengthens off South Carolina
A tropical storm watch was issued for the South Carolina coast after Alberto formed on Saturday, bringing an early start to the Atlantic hurricane season.
Tropical Storm Alberto had maximum sustained winds at 50 mph. At 11 p.m. EDT, Alberto was centered about 110 miles south of Charleston and 155 miles east of Savannah, forecasters at the U.S. National Hurricane Center said. It was moving southwest at about 6 mph.
An earlier report from a ship near the storm's center had put maximum sustained winds at 60 mph, the Hurricane Center said.