Tropical Storm Erin was expected to strengthen into a hurricane on Friday as it approached the northeast Caribbean, prompting forecasters to warn of possible flooding and landslides. The storm is expected to remain over open waters,

Erin, the first hurricane of the season, is now forecast to become a Category 4 by Sunday. Here's where it could head in the week ahead.

Hurricane Erin was expected to soak the Virgin Islands and Puerto Rico with heavy rain through the weekend before heading north up the Atlantic.