A passenger looks at a flight schedule board, Friday at JFK International Airport in New York. Airlines canceled many flights in and out of New York as a severe storm hit the Northeast last weekend. (AP Photo/Mark Lennihan)

Airlines canceled or delayed thousands of flights as a another late-winter storm threatened to hit the Northeast Corridor on Wednesday, with snow and wind likely to make travel difficult and dangerous.

By Tuesday night, more than 1,600 flights scheduled for Wednesday had been canceled, according to FlightAware. Most of the affected flights had destinations or departures in the Northeast Corridor. And on Wednesday morning, that number had jumped to more than 2,000 flights delayed or canceled nationwide. More than 500 were canceled or delayed at just John F. Kennedy International, La Guardia and Boston Logan International airports. At the three D.C. area airports, roughly 85 flights were delayed or canceled.

Amtrak also canceled some Wednesday service, affecting passenger rail travel between Washington and New York. The changes affected Acela Express, Northeast Regional, Keystone Service, and Empire Service trains.

For more details on the Amtrak service changes, check here.

This storm was not severe in the D.C. area, but it did bring some rain, snow and mixed precipitation– enough to create a messy commute Wednesday.

The storm comes on the heels of Friday’s n’oreaster that paralyzed travel all along the corridor, with high winds shutting down bridges, grounding flights and disrupting train service from Washington to Boston. Wind gusts in parts of the region exceeded 70 mph, above operating limits for aircraft. Some airlines and Amtrak were just rebounding from the impacts of that storm when the latest forecasts were made.

“The second big nor’easter in five days will take shape late Tuesday night and Wednesday, becoming a big snow producer from Philadelphia to Boston,” according to the latest forecast by The Washington Post’s chief meteorologist, Jason Samenow.

“Washington and Baltimore sit on the southern edge of this storm, so they are not expecting a major impact,” he said. “Enough cold air and moisture may join forces for two periods of rain and snow, however, which could lower visibility and produce a little slushy accumulation in parts of the region.”

Winter storm warnings have been issued from Philadelphia north to the Canadian border, affecting more than 36 million people.

Last Friday’s storm downed trees along the electric-powered rail line between Washington and Boston on Friday, causing service disruptions and cancellations. At least six people were killed when fierce winds brought trees crashing down on roads, homes and other buildings.

The nation’s four biggest carriers — American, Delta, United and Southwest — have flexible change policies for travel to the Northeast.

“After coming off of last week’s severe weather event, our teams are well-prepared to tackle this next weather system,” Henry Kuykendall, senior vice president of Delta’s Northeast Operations said in a new weather alert.

Transportation agencies across the corridor also are preparing and warning residents about possible poor road conditions starting Tuesday night.

Maryland transportation officials said crews were out Tuesday pre-treating highways, especially in the northern tier counties.  And, they closely monitored roads and patrol for any icy patches.

“Motorists are encouraged to pay close attention to conditions and travel with an abundance of caution, especially on elevated sections of highways” such as bridges, ramps and overpasses, the Maryland State Highway Administration said.