The hatched areas on the National Hurricane Center's tropical outlook map indicate "areas where a tropical cyclone — which could be a tropical depression, tropical storm or hurricane — could develop," said National Hurricane Center Deputy Director Jamie Rhome.

Dangerous rip currents are expected along the U.S. East Coast as Hurricane Erin grows in size this week, the National Hurricane Center said Tuesday.

Early on Aug. 17, Hurricane Erin's outer rainbands were "producing gusty winds and heavy rains across the Virgin Islands and Puerto Rico," according to the National Hurricane Center. Where will the hurricane hit?