The World War II aircraft carrier USS Intrepid on the partially-frozen Hudson River, in New York, Feb 20. A powerful blast of Arctic air, aided by a filament of the polar vortex, is forecast to bring more Arctic cold to flow across eastern US through the end of February. [Photo/Xinhua]

The new round of harsh weather is part of a system that has cut a curving, 2,000-mile path from southern Missouri to Maine.

Snow and ice contributed to major delays at John F. Kennedy International Airport in New York Saturday, with some arriving flights delayed more than two hours, and flights destined for Newark International Airport in New Jersey were delayed more than three hours, according to a Federal Aviation Administration advisory.

Winter weather advisories and winter storm warnings were in effect until Sunday for parts of West Virginia, Pennsylvania, New York, Massachusetts, Maine and New Hampshire, the NWS said.