The National Hurricane Center's prediction cone shows a westward trajectory, but doesn't paint a clear picture whether or not it's likely to impact the east coast of the United States. Spaghetti models, which represent a collection of predicted paths generated by multiple computer models, paint a more definitive picture as of Wednesday morning.

Tropical Storm Erin is forecast to track close to Puerto Rico and Hispanola as a major Category 3 hurricane, but is likely to turn north before the U.S. coast.

Tropical Storm Erin is still far out at sea, and experts say it is too soon to forecast its path as it approaches land. Based on some models and the official forecast from the National Hurricane Center, it is likely that Erin will become the first hurricane of the season and potentially the first major hurricane (Category 3 or higher).