Heavy snow was falling in northern Mecklenburg County at daybreak Monday as a lingering winter storm that dumped up to 20 inches of snow on western North Carolina posed hazards for the morning commute.
Residents caught in the storm are flooding Twitter with images of its wrath under the hashtag #Snowmagedden2018.
A winter storm brought snow totals above a foot to some portions of North Carolina and Virginia Sunday, prompting thousands of power outages and flight cancellations.
Cooper said at a news conference Sunday that emergency crews, including the National Guard, had worked overnight to clear traffic accidents on major interstates.
"Virginians should take all necessary precautions to ensure they are prepared for winter weather storm impacts", Northam said.
Snow was expected to fall through Sunday afternoon.
Most of the canceled or delayed flights were traveling into or out of North Carolina, South Carolina or Virginia. Stay safe where you are.
More than 276,000 people still were without power across seven states as of early Monday - with most of those, more than 141,000, in North Carolina.
North Carolina Gov. Roy Cooper said Sunday that the State Highway Patrol has responded to more than 500 crashes and 1,100 calls for service.
The storm was expected to move off the coast on Monday, although the NWS's lead forecaster Michael Schichtel warned it would continue to be "a unsafe system". After that, it'll be dry and cold through Tuesday, he said.
The cancelations are likely to continue into the week, with 300 American Airlines flights scheduled for Monday already canceled. Blue Grass Airport reported at least five flights to Charlotte, N.C. had been canceled.
Virginia State Police responded to 120 auto crashes on Sunday due to the snow, even though police in Prince George County had urged drivers to stay off the road. The airport had almost 400 cancellations, about one-fourth of its scheduled flights. Residents in Oak Park, North Carolina lost power after an electrical transformer exploded near their home.
The additional snow Monday will melt on most roadways, Moore said, but could add to the accumulations on roads covered with snow or ice from Sunday. "Please stay off the roads", Greenville County Emergency Management urged Monday, according to reports.