The National Hurricane Center says Tropical Storm Kyle has strengthened as it churns through the open Atlantic, south of Bermuda.

The storm’s maximum sustained winds have increased to 50 mph Thursday night. Forecasters say the storm could become a hurricane by Saturday as it moves north.

It’s centered about 555 miles south of Bermuda and is moving near 13 mph.

Forecasters expect the storm to continue moving north and strengthen over the next couple of days.

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