A POWERFUL winter storm led to the death of six people and forced the cancellation of about 550 US flights today, as heavy snow and high winds pummelled the northeastern United States.
At least six people were killed in road accidents related to the bad weather, police said.
The massive storm system touched off tornadoes in the South and produced snow in Texas before barrelling down on the densely populated Northeast.
The service forecast 12 to 18 inches (30.5 to 46 cm) of snow for northern New England after the storm moved northeast out of the lower Great Lakes, where it left more than a foot (30.5 cm) of snow on parts of Michigan.
The storm front was accompanied by freezing rain and sleet, creating hazards on the highways and at airports.
None of the 134 people aboard Tampa-bound flight No. 4695 was injured, police said.
"It's been undetermined at this time if weather was a factor," a police spokeswoman said.
So far, 548 US airline flights scheduled for today had been cancelled, according to FlightAware.com, a website that tracks flights.
American Airlines had the most cancelled at 55. A total of about 1,500 US flights were cancelled yesterday.
New York state activated its Emergency Operations Center late last night to deal with the first major storm of the season.
Governor Andrew Cuomo warned the heads of seven utilities they would be held accountable for their performances. Utilities near New York City were criticised for lingering outages after Superstorm Sandy devastated the region in October.
New York state has seen little snow during autumn and winter. Buffalo, New York, was 23 inches (58 cm) below normal for the season before the storm, said Bill Hibbert, a National Weather Service meteorologist.
"We're short and even this big snow isn't going to make it up for us," he said.
The storm dumped record snow in north Texas and Arkansas before it swept through the US South on Christmas Day and then veered north.
The system spawned tornadoes and left almost 200,000 people in Arkansas and Alabama without power today.