"Heavy rainfall is possible on the Outer Banks of North Carolina, with potential for a maximum of 4 inches," NHC said Tuesday.

Erin briefly became a Category 5 hurricane over the weekend and weakened to Category 3 status as it moved north and west of Puerto Rico this weekend. It is now a Category 4 storm and will be moving more north in the next few days. A second disturbance could develop west of Erin later this week.

Tropical storm watches expand from the Virginia beaches to Fenwick Island, Delaware, including Ocean City, Maryland.

Two more tropical systems trail Hurricane Erin, which is following a projected course that brushes past the East Coast without making landfall.

Erin is the first hurricane to develop over the Atlantic this year, and meteorologists are closely tracking its path and forecast.

The hurricane’s behavior in recent days makes it one of the fastest-strengthening Atlantic hurricanes on record.

Get an abbreviated, text view of what's happening with Hurricane Erin. Hurricane Erin was a Category 4 storm again Monday morning and is expected to grow even larger and stronger, according to the latest advisory from the National Hurricane Center.

Fishermen are watching the weather intently as Hurricane Erin's predicted big swell could throw a fork in their plans