As Hurricane Erin swirls off the mid-Atlantic coast, the NHC is now watching three other systems for tropical development.

The National Hurricane Center is monitoring two areas in the Atlantic Ocean for potential tropical development behind Hurricane Erin, with the closest area to watch expected to to track near Puerto Rico and the Caribbean.

The first area has been under the eyes of the National Hurricane Center for a few days as it emerged off Africa’s west coast.

Jean-Raymond Bidlot, senior scientist in ocean modeling at the European Centre for Medium-Range Weather Forecasts (ECMWF) told Newsweek that Erin is forecast to strengthen over the next week as it heads toward the U.S. East Coast, reaching peak intensity offshore from Cape Hatteras.

Ocean buoy captures images of swells from Hurricane Erin topping 30 feet. Surfers continue to flock to S.C. beaches to catch bigger-than-normal waves.

New York and New Jersey — along with most East Coast states — are facing threats of life-threatening rip currents and massive waves from Hurricane Erin as the massive Category 2 cyclone creeps continues to churn off the coast.

Scientists detect unusually deep earthquakes beneath the Mid-Atlantic Ridge seafloor, finding CO2 present there in magma.

A Navy pilot based at Naval Air Station Oceana was rescued from the Atlantic Ocean off Virginia’s coast Wednesday after ejecting from a fighter jet.