A large snowstorm hovering over the northeastern United States on Monday was forecast to drop up to 60 centimeters of snow over a region that has seen repeated heavy snowfall in the past two weeks. Massachusetts Governor Charlie Baker asked residents of the state to avoid traveling, the mass-transit system in the city of Boston was operating on a limited schedule, and most flights at Boston's international airport had been canceled by early Monday. Snowy conditions contributed to more than 1,500 flight cancellations around the United States on Monday, with the largest number reported in Boston and New York City. Winter storm warnings were announced from central New York state through northern Connecticut, Massachusetts, and southern New Hampshire. A winter weather advisory was issued for the New York City area, with 10 to 20 centimeters of snow and 0.6 centimeter of ice possible through Tuesday morning. More than 30 centimeters of snow had fallen on Boston since the storm started early Sunday, according to the National Weather Service (NWS), which warned that snow likely would continue into Tuesday morning. By 1200 GMT on Monday, Boston had received about 1.7 meters of snow so far this winter, mostly in the past two weeks, putting the winter of 2015 on pace to be among the 10 heaviest snowfalls recorded in the city's history. "We don't have that far to go to get into one of the top-10 snowiest winters," said NWS meteorologist Nicole Belk. Boston received about 1.9 meters of snow in its 10th snowiest winter on record, the winter of 1919-1920. The record-high seasonal snowfall, almost 2.7 meters, was set in the winter of 1995-1996, the NWS says.