Tropical Storm Erin continues its westward path across the Atlantic, expected to become a hurricane Aug. 15, and a major hurricane by Sunday morning.

The National Hurricane Center is tracking Tropical Storm Erin, a system that is likely to charge up to be the first hurricane of the season.

Tropical Storm Erin is forecast to intensify into a hurricane as it brushes Puerto Rico, then turn north. Its impacts on the U.S. east coast next week are still uncertain.