A student from Singapore makes his way through Grand Central Terminal on his way home from an academic competition in Connecticut, Tuesday, Nov. 25, 2014, in New York. Some Thanksgiving travelers along the East Coast were heading out early because of a forecast calling for a nor'easter that will bring rain and snow. Travelers pass a large photograph of an airplane at LaGuardia Airport in New York, Tuesday, Nov. 25, 2014. Holiday travelers at Grand Central Terminal wait to board trains to Connecticut, Tuesday, Nov. 25, 2014, in New York. Travelers wait in lines to check in at LaGuardia Airport in New York, Tuesday, Nov. 25, 2014. John Eresian, left, of Exeter, N.H. and his daughter from San Francisco make their way through Grand Central Terminal to catch a train to Connecticut for the Thanksgiving holiday, Tuesday, Nov. 25, 2014, in New York. MINEOLA, N.Y. (AP) - Thanksgiving travelers scrambled to change their plans and beat a storm expected to bring snow, slush and rain to the crowded Washington-to-Boston corridor Wednesday on one of the busiest, most stressful days of the year. Forecasters said major Northeast cities will probably see moderate to heavy rain most of the day, though New York and other places were also gearing up for several inches of snow. Higher elevations west of the Interstate 95 corridor could see as much as 6 to 12 inches before the nor'easter exits Wednesday night, meteorologist Andrew Orrison said. "I always go on Tuesday to try to avoid the Wednesday rush, but it seems like more people are leaving on Tuesday now," said Bill Fraser, a landscaper from Henniker, New Hampshire, who was taking a train from Boston to New Rochelle, New York, to visit his mother for Thanksgiving. Jenna Bouffard, a New York City public relations executive headed in the opposite direction, changed her bus ticket from Wednesday to Tuesday. "I'd rather be safe than sorry, and if it doesn't snow, then I just have an extra day at home with my family" in Uxbridge, Massachusetts. Major airlines dropped their ticket-change fees for people flying in and out of the Northeast, allowing passengers to try to sneak on an earlier flight, though that appeared to be a challenging proposition, since most planes were filled. By midafternoon Tuesday, just 14 flights within the U.S. were canceled for Wednesday, according to tracking service FlightAware. That's well below the norm for even a sunny day. United said it was planning to cancel 100 flights Wednesday in and out of Newark Liberty Airport in New Jersey - a small fraction of the traffic there. Delta planned to scrub 57 flights. The Port Authority of New York and New Jersey, which operates Kennedy, LaGuardia and Newark Liberty airports, said it was lining up extra staff and snow removal equipment in the event of a heavy snowfall. Crews were prepared to work in 12-hour shifts if necessary, officials said. At Newark Airport, retiree Sue Hansen, who lives in Roscoe, Illinois, arrived early on Tuesday to avoid the rush ahead of a big family reunion near Morristown, New Jersey. "I've traveled the day before, and it was no good," she said, describing long lines, delays and lots of crowds. This wasn't bad at all. In Vermont, public safety officials warned that travel could be treacherous. Up to 16 inches of snow was forecast in some areas. There was a bright spot in the forecast for residents of western New York, which last week saw up to 7 feet of snow. "Buffalo will predominantly miss this event," Orrison said. Associated Press Writers Jill Colvin in Newark, N.J., Denise Lavoie in Boston, and Scott Mayerowitz and Karen Matthews in New York contributed to this report.