The system is located just east of the Bahamas and is expected to move north over the Atlantic.
Although there are now no coastal watches or warnings in effect, weather officials warned that Hurricane Chris could potentially produce heavy surf and create life-threatening rip-currents along the East Coast in the coming days. Chris is moving to the northeast at 29 miles per hour (46 kph) with maximum sustained winds of 85 miles per hour (140 kph).
Ms Thornton said the fate of the weather depends on the position of the jet stream - the winds blowing from west to east in the upper atmosphere.
The storm was expected to strengthen through Wednesday and then lose force from Thursday, the center said.
The storm, once the second hurricane of 2018 in the Atlantic, weakened to a tropical storm on Thursday morning with 70 miles per hour winds. Remnants of Tropical Storm Beryl continued to be a rainmaker in the Caribbean, affecting the Dominican Republic and Haiti as well as Western Cuba, the NHC said.
If you're on the Atlantic coast, you may want to stay out of the water for the next few days.
"These swells could cause life-threatening surf and rip current conditions", it said.
Ocean swells along the southern coast of Newfoundland are expected to reach eight metres in some areas, while the Atlantic coast of Nova Scotia could also receive swells of up to four metres.
"A continued northeastward motion accompanied by a steady increase in forward speed is expected through Thursday night.", forecasters said.
The National Weather Service issued a flash-flood watch for Puerto Rico, warning of thunderstorms and wind gusts.