Nadine strengthened to a hurricane Friday as it swirled in the Atlantic Ocean, though it posed no threat to land, US forecasters said.
With top winds of 75 miles (120km) per hour, Hurricane Nadine was a category one storm on the five-point Saffir-Simpson scale.
The US National Hurricane Center said the eye of the storm, the eighth hurricane of the 2012 Atlantic season, was centered about 725 miles east of Bermuda.
It was moving north-northeastward at 14 miles per hour.
"A turn toward the northeast and a slight decrease in forward speed are expected by Saturday morning, followed by an acceleration toward the east Saturday night and Sunday," the Miami-based NHC said in an advisory.
It said little change in strength was expected over the next 48 hours.