The system is expected to strengthen into a hurricane by Friday and could even become a major hurricane, according to experts.

Erin formed in the eastern Atlantic Ocean on Monday and is strengthening as it moves westward. The NHC said there is still uncertainty about what impact it could have on states like Florida on the U.S. East Coast, as well as the Bahamas and Bermuda.

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