A coastal storm will deliver snow to part of the southeastern United States on Sunday before eyeing the mid-Atlantic coast and New England on Sunday night.

A potentially disruptive winter storm expected to move across the eastern United States later this week could bring snow to the Appalachians, the Mid-Atlantic and the Northeast, but forecasters warned on Monday that it was too early to know exactly how the complicated system would unfold.

After a brief pause, the La Niña winter weather pattern is back and is expected to bring cold air to the Northern Tier and possible snow and rain along the East Coast.

Millions of Americans were under coastal weather alerts on Thursday amid strong winds and large waves, among other concerns.

Forecasters expect "disruptive" winter weather in coming days, but the details are rapidly changing as two systems develop.

Abnormally blustery temperatures this weekend could usher in snowy weather across the East. Exactly where remains uncertain, but even the Deep South is on alert.

The next round of winter weather is on the way for the U.S., impacting at least 25 states and bringing snow showers as far south as North Carolina and Tennessee, while lake-effect snowbelts in the Midwest and interior Northeast are once again in the bull's eye for highest accumulations.