Maryland and Virginia residents are preparing for a possibly significant winter storm that is expected to deliver heavy snowfall and dangerously low temperatures starting Sunday afternoon according to the National Weather Service (NWS).

Most of the United States is being assailed with extreme winter weather this week as Arctic air blasts south from Canada, snow tracks up the Northeast coast and a potentially crippling winter storm takes aim at the South.

The first surge of Arctic air moved into New Mexico Saturday night and will continue to drop temperatures statewide going into the week.

What happens in the Arctic doesn't stay in the Arctic,' says a conservation lead and climate expert on the accelerated warmth occurring in the polar region.

The coldest blast winter air this season is settling into Middle Tennessee and will stick around for several days. Subzero wind chills are possible early on Monday.

BATON ROUGE, La. (WAFB) - Winter weather is here! Arctic air is moving into the region and will cause highs to only reach the 40s this afternoon. Hard freeze conditions begin tonight as lows dip to the 20s.

Bitterly cold temperatures continue on Sunday because of the arctic blast, and there's another chance of snow in Oklahoma on Monday. >> Go to the KOCO weather page | Get KOCO on the Go | Subscribe to KOCO 5's YouTube channel

Last-minute changes to the location of the 47th presidential inauguration ceremony may have foiled plans by the public to watch the event in person, but here's how to catch the whole event as it's broadcast and streamed live.

As the Arctic blast sweeps throughout the state, shelters in the metro area are ready to provide support and services to ensure people in need stay out of the dangerously cold temperatures.

As an arctic blast sweeps through Colorado, homeowners turn to various ways to stay warm, including space heaters. However, fire officials remind residents about the risks of using these devices.

The extreme cold is dangerous to our pets, so limit outdoor time to just quick "potty breaks" during sub-zero wind chills; not lasting longer than five to ten minutes.

Meteorologist Drake Foley has the latest as frigid air and single digit wind chills have moved into the area due to an arctic blast.