NEW YORK — Kennedy Airport remains closed until 7 a.m. Friday, the Port Authority tweeted, after strong winds whipped up white-out conditions as a powerful winter storm hit the East Coast.

The airport announced the temporary suspension at 11 a.m. Fights are schedule to resume Friday morning. Customers should still contact their airlines to determine the status of their flights, officials said.

Flights scheduled to resume at JFK Airport at 7 a.m. Friday, after today’s suspension of operations due to exceedingly strong winds and blowing snow. Fliers are urged to contact their airlines for information on resumption of specific flights before going to the airport. — Port Authority NY&NJ (@PANYNJ) January 5, 2018

LaGuardia Airport, which was also closed, has reopened, the Port Authority said. The airport had closed at 2:30 p.m.

The AirTrain to JFK has been suspended because of the weather, the airport said. A free shuttle bus service will be provided.

American Airlines said all departures and arrivals at both LaGuardia and Newark airports have been canceled throughout the day and will resume on Friday.

In addition to snarling airline travel, the first major snowstorm of the new year is affecting interstate rail travel. Amtrak planned to operate a modified schedule between New York and Boston on Thursday. Northeast Regional Service between Washington, D.C., and Newport News/Norfolk, Virginia, was canceled for Thursday.

Called a "bomb cyclone" because it's rapidly intensifying, the storm is expected to dump 6 to 9 inches on the Jersey coast and New York City, with higher amounts possible in Queens where heavy banding is occurring. Between 9 and 12 inches of snow are forecast on Long Island and much of Connecticut.