Updated — Nov. 26, 8:20 p.m. ET:
A nor’easter making its way up the East Coast is causing airlines to cancel hundreds of flights, playing havoc with thousands of people’s Thanksgiving travel plans.
From Florida to Maine, widespread precipitation was expected into Thursday, according to the National Weather Service. Snow is forecast at higher elevations, particularly in New England, while sleet is expected in New York and New Jersey.
This snowfall total map shows where the highest amounts are expected through Thursday.
In Washington, D.C., a light amount of snow fell Wednesday, while north and west of the city saw about 6 inches of snow.
Up to 7 inches of snow fell across central and western Maryland on Wednesday, which made highway travel extremely dangerous.
An estimated 46 million Americans are expected to travel more than 50 miles for the Thanksgiving holiday, according to AAA.
On Tuesday, airlines preemptively canceled more than 200 flights scheduled for Wednesday. By noon Wednesday, that number had more than doubled to more than 480, according to the flight tracking website Flight Aware.
More than 925 flights were delayed between 12 p.m. and 4 p.m. ET, according to the site’s real-time “Misery Map” tracker.
The U.S. airports with the highest number of flight cancellations Wednesday were Newark Liberty, LaGuardia, Philadelphia International, and Reagan National.
Delta, United, and American have all waived customary fees for flight changes for those flying in and out of the northeast, but the large volume of people traveling posed a difficulty for those seeking to rebook.
The Port Authority of New York and New Jersey — which oversees JFK, LaGuardia, and Newark Liberty airports — said it has snow equipment at the ready and extra personnel on duty to handle the expected conditions.
"Depending on the projected snowfall levels … staff are prepared to work around-the-clock in 12-hour shifts if necessary," the Port Authority said.