Tropical Storm Kyle has gained strength as it swirls in the open Atlantic, south of Bermuda.

The National Hurricane Center says Kyle’s maximum sustained winds have increased to near 60 mph early Friday. And forecasters say the storm could become a hurricane by Saturday as it moves north.

A tropical storm watch has been issued for Bermuda.

Kyle is centered about 510 miles south-southwest of Bermuda and moving north near 12 mph.

Kyle is the 11th named storm this season in the Atlantic.