Blizzard Buries Northeast as Cities Shutter Schools, Airlines Cancel Flights

This could be the biggest snowstorm of the season.

— -- Snow is piling up in cities across the Northeast today in what could be the biggest blizzard of the season, affecting about 50 million people.

The weather system developed in the Midwest before moving east across the country, bringing a light blanket of snow from Iowa to Ohio Wednesday. The system swept into the Northeast this morning and quickly intensified as it hit the East Coast, according to ABC News meteorologists who are tracking the storm.

“This is what we call a nor’easter in meteorology,” ABC News senior meteorologist Max Golembo said. “That’s when winds primarily come out of the Northeast for the duration of the storm.”

Today’s snowy conditions are in stark contrast to Wednesday’s balmy weather, when some northeastern cities, such as Philadelphia and New York City, enjoyed record-high temperatures in the low- to mid-60s.

Snow Accumulations

As of this morning, the National Weather Service had issued blizzard warnings for Long Island, New York, and eastern Massachusetts, as well as winter storm warnings for Philadelphia, New York City, Boston and Portland, Maine.

As of 7 a.m. ET, almost 2 inches were recorded at New Jersey's Newark Liberty International Airport, while 2 inches had fallen in New Canaan and Bridgeport, Connecticut, according to the National Weather Service.

As of 8 a.m. ET, almost 8 inches of snow had fallen in Albany, New York, and about 3 inches of snow had accumulated in New York City’s Central Park, according to ABC News meteorologists.

As of 9 a.m. ET, 5 inches of snow had accumulated in Haskell, New Jersey, about 6.4 inches had fallen in Bronx, New York, and 6.4 inches had accumulated in Danbury and Newtown, Connecticut, according to the National Weather Service.

As of 1 p.m. ET, 7.7 inches of snow had piled up at New Jersey's Newark Liberty International Airport, 9.5 inches had fallen at New York City's LaGuardia Airport and 10 inches had accumulated at Connecticut's Sikorsky Memorial Airport, according to the National Weather Service.

The snowfall is expected to end in New York City by 3 p.m. ET and between 9 and 10 p.m. ET in Boston and eastern New England, according to ABC News meteorologists.

ABC News meteorologists say Philadelphia could get up to 6 inches of snow, New York City could see up to a foot and Boston could have up to 15 inches of snow by the end of the day.

Travel

The heavy snowfall is creating hazardous travel and whiteout conditions for many cities in the Northeast.

The National Weather Service advised against travel in New York City and the surrounding tri-state area this morning because of the snowstorm. The federal agency urged people to have an “emergency kit” on hand if travel becomes absolutely necessary.

“Travel is NOT recommended tomorrow morning due to heavy snow. If you absolutely must venture out, have an emergency kit in your car,” the National Weather Service in New York City tweeted Wednesday.

ABC News’ Linzie Janis, reporting from the New Jersey Turnpike this morning, said the roads were snow-covered and the travel conditions were “pretty treacherous.”

“These roads may only get worse. Of course, those extra-cold temperatures are on the way and it could all turn to ice,” Janis said on “Good Morning America.” “We’ve seen several accidents already.”

Thousands of flights were canceled out of airports in the Northeast region as the storm approached. As of this morning, over 3,000 flights were canceled within, into or out of the United States today.

The Port Authority of New York and New Jersey said up to 1,800 flights have been canceled so far at Newark Liberty International Airport, John F. Kennedy International Airport and LaGuardia Airport.

“There is very minimal air traffic at this time primarily because there are so many cancellations,” Port Authority spokesman Steve Coleman told ABC New York City station WABC-TV this morning.

Area airports should be able to resume full operations by Friday morning, he said.

Meanwhile, Boston Logan International Airport had canceled 341 flights and Philadelphia International Airport had canceled 107 as of this morning, according to officials.

Accidents

As of 11 a.m. ET, New Jersey State Police said its troopers had responded to reports of 198 motor-vehicle crashes and 226 motor-vehicle aids in their patrol areas since midnight.

According to the New York City Police Department, a doorman was killed while shoveling snow this morning after he slipped and fell through a glass window of his building on E. 93th Street in Manhattan.

School Closures

Many schools and administrative offices throughout Philadelphia, New York City and Boston were closed because of the storm.

ABC News' Gregory Croft, Max Golembo, Joshua Hoyos and Aaron Katersky contributed to this report.