A winter storm expected to bring heavy snow to Philadelphia on Sunday is already impacting air travel.

The winter storm hitting the tri-state area is significantly affecting air travel, causing cancellations and long delays for flights at John F. Kennedy, LaGuardia, and Newark airports. A handful of flights scheduled to depart the tri-state area have already been canceled,

With a winter storm moving through the tri-state Sunday afternoon, the New York City metro area’s three major airports were all seeing delays and cancellations. As of 2 p.m. Eastern, Newark Liberty International was seeing 254 cancellations into or out of the airport and another 82 delays Sunday,

Residents across the country from the Northern Plains to the tip of Maine are bracing for dangerously low temperatures as residents along the East Coast contend with a thick blanket of snow — and more snowfall in the forecast.

Snow was falling in the Mid-Atlantic and New York City on Sunday. The coldest air in several years will descend across much of the country starting Monday, forecasters said.