There are now more weather-monitoring devices to make sense of incoming data, the mayor said. There is also a new meteorologist in the city’s Office of Emergency Management.

Here are the latest effects from the storm

The snow: New York City was forecast to get two to four inches of snow on Monday, according to the National Weather Service, but as of 1 a.m. Tuesday, only one and a half inches had fallen in Central Park. Less than an inch of snowfall observed at both Kennedy and La Guardia airports, the agency said.

The most snowfall recorded in the city on a Dec. 2 was 3.9 inches in 1929.

The temperature: Today will start in low 30s, and by the afternoon the mercury in the city may be near 40 degrees, which is just a bit lower than usual for this time of year. Brace for strong winds that will make it feel colder.

The schools: New York City public schools are open today, and after-school programs will continue as scheduled.

Transit: As of 5 a.m., most commuter train service in the region was running on time or close to on time. Still, check for delays on Metro-North, the Long Island Rail Road and New Jersey Transit before leaving home.

As for the roads, New York City’s Sanitation Department spread liquid brine on highway ramps yesterday, and salt spreaders were dispatched on streets.

The airports: Hundreds of flights had been canceled as of yesterday afternoon, with many of the scrubbed flights at the airports serving New York and Boston. Delays in the New York area had ranged from 90 minutes to over three hours.