Forecasters have upgraded Tropical Storm Leslie into a hurricane.

The National Hurricane Center in Miami said in its midday forecast Wednesday that Leslie was about 750 kilometers south of Bermuda and moving very slowly to the north.

Top sustained winds are 120 kilometers per hour.

Forecasters have not yet predicted whether Leslie will strike land, but say those living on Bermuda should closely monitor the storm. They also say Leslie could create life-threatening surf along the U.S. east coast.

Leslie is the sixth named hurricane of the Atlantic season, which began June 1 and lasts through November.