Old Man Winter dealing Northeast nasty start to 2014 Jack-knifed tractor-trailer caused closure of stretch I-95 south in Philadelphia ilnl heavuy snow early Friday KYW-TV Last Updated Jan 3, 2014 6:19 AM EST BOSTON -- A blustering post-Christmas snowstorm that has dropped nearly 2 feet of snow just north of Boston, shut down major highways in New York and forced U.S. airlines to cancel thousands of flights nationwide is continuing its bitter cold journey through the Northeast. The brutal weather - which brought plummeting temperatures to some areas that forecasters predicted could see highs just above zero and wind chill readings of well below zero by early Friday - dumped 21 inches of snow in Boxford, Mass., late Thursday night and 18 inches in parts of western New York near Rochester. In Central Park early Friday, the National Weather Service said just over 3 inches of snow had fallen. Wind chills as low as ten below zero were recorded in New York City and Long Island early Friday. All New York City public schools were closed. The snowfall, frigid cold and stiff winds extended Christmas break for some students while posing the first test for New York City's new mayor and perhaps the last challenge for Boston's outgoing one. U.S. airlines canceled more than 2,300 flights due to snowfall and low visibility. "It's been a tough road," said traveler Heather Krochuk, of Toronto, Canada, inside a Boston hotel Thursday night after her flight home out of Logan International Airport got canceled in what's turned into a 36-hour trip from Seattle, where she spent Christmas with her husband, Ron. But, she said, "we have a place to sleep that isn't the airport." Snow began falling overnight Wednesday in parts of New England and New York state, but the brunt of the storm began late Thursday. The National Weather Service issued a blizzard warning for Cape Cod, coastal areas north and south of Boston and part of Maine as well as New York's Long Island. Massachusetts Gov. Deval Patrick said state offices that closed early Thursday would remain closed on Friday. He said National Guard members and state police were on standby for any high tide flooding in vulnerable coastal areas, but no mandatory evacuations had been ordered. Terry Eliasen, meteorologist and executive weather producer of CBS Boston station WBZ-TV called the storm "one of the coldest snowstorms in recent memory. Boston, Worcester and all points north and west are stuck in the single digits and dropping! Wind Chill values are between -10 and -25 - truly dangerous stuff. New York Gov. Andrew Cuomo ordered three major highways in his state, stretching from Long Island to Albany, closed overnight and extended the ban early Friday until at least 8 a.m., except for allowing passenger vehicles to resume using the New York State Thruway from Albany to New York City. As of late Thursday in Connecticut, about 3 inches of snow had fallen in Hartford County, and 3 inches were reported in East Hartford and Simsbury. Parts of New Hampshire had 5.5 inches, and areas of Rhode Island had more than 2. Outreach teams looked to get homeless people off the frigid streets of New York City and Boston. Staff members at the Pine Street Inn were keeping the Boston shelter open 24 hours and said they would turn no one away, even if it meant setting up extra cots in lobbies and other common areas. The heavy weather began rolling in just a day after New York Mayor Bill de Blasio was sworn in to lead the nation's largest city and a few days before Boston Mayor Thomas Menino ends 20 years in office on Monday. De Blasio, who as public advocate in 2010 criticized his predecessor, Mayor Michael Bloomberg, for his handling of a large snowstorm, dispatched hundreds of plows and salt spreaders on the streets as soon as the snow started falling Thursday night. Forecasters said that while only 3 inches of snow had fallen in Central Park by early Friday, up to 8 inches were still expected in the city. "If you don't need to go out, please don't go out," de Blasio said at a press conference Thursday evening, urging residents to use mass transit. Stay off the streets, stay out of your cars. Across the region, state and local police were busy responding to accidents and reports of stranded vehicles. Amtrak planned to run trains on all of its Northeast lines on Friday but operate on a modified schedule, spokeswoman Christina Leeds said. As the storm approached, a worker at a suburban Philadelphia salt storage facility was killed when a 100-foot-tall pile of road salt fell and crushed him. Falls Township police said the man was trapped while operating a backhoe. There was no word on what may have caused the accident. Douglass Bibule shopped for rock salt and other supplies at a home improvement store in Watertown, N.Y. "Well, there will be some shoveling that I will have to do and some sanding," he said. The snowstorm worked its way east from the Midwest, where it dropped up to a foot of snow on Michigan and more than a foot in parts of Illinois, prompting the cancellation Thursday of hundreds of flights at both Chicago airports. Nearly 17 inches of snow fell in some of Chicago's northern suburbs, and more than 12 inches of snow was recorded at Midway International Airport. But there was relief in the forecast, for the Northeast, at least. WBZ's Eliasen says, "Believe it or not, rain is in the forecast by Sunday night, a big turnaround from the Arctic Air residing over New England right now."