Forecasters say Erin will likely become a hurricane by late Thursday and a major hurricane by early Sunday, but it's still too early to determine what sort of impacts the storm could have, if any, on the U.

Tropical Storm Erin on Tuesday continued to push west through the Atlantic with the National Hurricane Center still forecasting it to become a major hurricane, and Puerto Rico and other Caribbean islands now within the projected path.

Tropical Storm Erin has not intensified since it formed yesterday. While the atmospheric pattern looks conducive to development and the ocean ahead is warmer, the air surrounding the system is still quite dusty and dry.