Swells generated by Erin are likely to cause dangerous surf and rip current conditions in the Virgin Islands and Puerto by the weekend.

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.

Tropical Storm Erin is forecast to strengthen into the first hurricane of the Atlantic season by Saturday morning and then become a major Category 3 hurricane by Sunday morning as it passes north of Puerto Rico. But as of now, Erin is not expected to pose a direct threat to the U.S.