A second major winter storm will hit the East Coast with up to 12in of snow, blowing wind and bitter cold forecast.
Even before the first flakes had fallen, the government offices in Washington DC and schools in several states were closed pre-emptively.
In New York, snow began falling during the morning commute, and authorities warn of hazardous road conditions.
And more than 2,500 flights have already been cancelled.
The storm comes just two weeks after a weather pattern known as the polar vortex brought heavy snow and record low temperatures to the eastern half of the US.
A second major winter storm will hit the East Coast with up to 12in of snow, blowing wind and bitter cold forecast
Winter storm warnings have been declared from West Virginia to Boston, with some of the heaviest accumulations threatened along the coastal cities.
Washington DC is expected to see its heaviest snow fall in three years, and temperatures across the eastern US are expected to be 10 to 25 degrees colder than average on Tuesday and Wednesday, according to the National Weather Service.
As the snow began falling in Washington DC, the White House cancelled its daily press briefing and a meeting of President Barack Obama’s commission on electoral administration.
The weather has also affected New Jersey Governor Chris Christie’s second inauguration. Organizers have cancelled the party scheduled for Tuesday night on Ellis Island in New York Harbor.
A wintry storm, which started in the Southwest on Thursday, could affect a good chunk of the country by the time its westward march comes to an end.
The storm making its way through New Mexico and Texas, with the possibility of advancing to the Northeast and hindering holiday travel plans along the way.
The inconveniently-timed storm will especially be a concern for the 43 million people who are expected to travel 50 miles or more for the Thanksgiving holiday, according to AAA.
Three million of those are slated to fly to their destinations, AAA predicted.
The “Nordic outbreak” will “produce a mixed bag of wily weather that will end up impacting much of the nation,” said National Weather Service meteorologist Joe Harris.
More than a foot of snow was reported on Sunday in many mountain regions of Utah and Colorado, but the greatest accumulation reached almost four feet in Abajo Peak in southeast Utah, according to the Weather Channel. Even Flagstaff, Ariz. has seen 6 inches of snow since the storm started Thursday night, according to AZ Central.
On Sunday, most of New Mexico and Texas and parts of Oklahoma were placed under National Weather Service winter storm warnings until Monday.
In New Mexico, forecasters predicted 5 inches of snow and temperatures as low as 20. The snow that began late Saturday, paired with the freezing temperatures, created dangerous driving conditions, and many roads were closed.
The icy roads there led to a rollover accident that killed a 4-year-old girl, State Police Sergeant Emmanuel Gutierrez said.
The inconveniently-timed storm will especially be a concern for the 43 million people who are expected to travel 50 miles or more for the Thanksgiving holiday
New Mexico NBC affiliate KOB reported strong winds and near white-out conditions late Saturday night along a stretch of I-40, about 80 miles west of Albuquerque.
On Saturday, a storm-related crash involving nearly a dozen vehicles left three dead in the Texas Panhandle.
Three more were killed due to the storm in California, where the storm first hit. A man was killed when he crashed his car into a tree and a woman was killed when a tree collapsed onto her parked car. A third person in California was found dead near power lines that were down due to heavy winds and flooding.
Additional flooding in Arizona swept a man into the Santa Cruz River. Firefighters recovered his body on Friday.
The wild weather system will spread east to Arkansas and northern Louisiana Sunday night into early Monday, according to the Weather Channel.
From there, it will most likely bring heavy rain to the Southeast through Tuesday, according to Weather Channel meteorologist Dr. Tom Niziol.
The storm is expected to dump rain on areas from Atlanta to the Carolinas on Monday and Tuesday then turn to snowfall over Tennessee through West Virginia as it continues to progress Northeast on Wednesday, Tom Niziol said.
Conditions in the Northeast were largely dry Sunday, but the region experienced a cold blast that bought temperatures down to 10 degrees overnight – conditions “considered cold by January standards,” according to the National Weather Service.
The region might see the second waves of the winter storm system on Wednesday, as many last minute travelers attempt to fly or drive long distances.
A blast of cold air from the north could merge with the storm system from the south and lead to snow accumulation in western and northern New England, Pennsylvania and New York, according to the Weather Channel.
In a second possibility, the two systems would not meet, but low pressure could produce snow in main northeast coastal cities.
Whether or not travelers make it to their destinations, the storm will have moved out to sea by Thanksgiving Day, allowing for dry conditions across most of the country, according to the Weather Channel.
Still, the Weather Channel predicts temperatures in the eastern part of the country will be 10 to 20 degrees below average on the holiday.
Thursday morning wind gusts between 20 and 30 mph in the Northeast could have the potential to damper the Macy’s Thanksgiving Day Parade in New York City, according to AccuWeather.com.