According to FlightAware, as many as 4,300 flights on the east coast were cancelled at 11:30 local time as Winter Storm Grayson brings snow and wings to the area. The flight tracker also reports that over 9,000 flight have been delayed.

Newark Liberty International Airport (EWR), a United hub in New Jersey, has had 881 cancelled flights, or about 70% of its schedule, so far today. Boston Logan International Airport (BOS), a JetBlue hub, saw 716 cancellations. New York LaGuardia (LGA) has seen 540 flights cancelled so far.

New York John F. Kennedy International Airport (JFK) closed early on this morning and, at the time of writing, is expected to reopen around 15:00. Service by JFK’s AirTrain, which connects the New York subway with the airport, has also been suspended. Regardless, only 207 flights, 32% of scheduled departures, were cancelled out of the airport.

The Port Authority of New York and New Jersey says that it has 524 pieces of snow equipment at the airports of the two states that can melt as much as 500 tons of snow per hour. They also warn that many flights could be cancelled due to high wind speeds and poor visibility. In addition, flights could be cancelled if crews are unable to reach their assigned planes.

“If warranted, the Port Authority also is prepared to accommodate ticketed passengers who may become stranded at the airports,” Port Authority officials said in a statement.

Many airlines report that their international flights will be made a priority. International flights are often easier to fly because they are operated by larger, more powerful planes. In addition, cancelling international flights can cause a larger number of logistical problems because large amounts of aircraft and crew would be out of position, while domestic flights have greater access to aircraft and crews within the country.

Today won’t be the only day affected by the storm. On Friday, January 15, at least 200 flights will be cancelled, according to FlightAware.

Passengers are encouraged to check with their airline to determine whether their flights have been cancelled. American, Southwest, Delta, United, and JetBlue have made travel waivers available for affected passengers. Spirit Airlines, the largest carrier at Atlantic City’s airport, says that passengers ticketed to or from the airport on Thursday or Friday can switch to new flights without a fee through January 10.

According to FlightAware, United Airlines currently has the most cancellations with 509.

American Airlines has scrapped its entire Thursday schedule into and out of New York LaGuardia Airport until at least 15:00. It has also cancelled its shuttle service to Washington D.C. and Boston. The carrier currently has around 383 cancellations; including its regional carriers, this number increases to 775 flights.

Southwest Airlines warned passengers that flights to and from as many as 19 airports on the east coast may be cancelled, delayed, or diverted to weather conditions.

East Coast cancellations are having negative effects across the country. At Chicago O’Hare International Airport (ORD), 158 flights have been cancelled so far today.

Winter Storm Grayson has shown dramatic drops in barometric pressure. It has brought high winds, heavy snow, low temperatures, and more to the East Coast. Areas such as Florida, Georgia, and South Carolina, which do not usually get large amounts of snow, have gotten up to 5.5 inches of snow.

“Minor to major coastal flooding and erosion will be possible, especially during high tides,” said a report by the National Weather Service. “Dangerous travel, scattered power outages, and bitter wind chill can be expected across the entire east coast.”

Featured image from Flickr