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.

The air feels tropical in North Carolina, but tropical activity is ramping up in the Atlantic Ocean were Erin may become a hurricane. Erin may also could impact the Leeward Islands and Puerto Rico depending on how far north the storm tracks.