A winter storm watch also is in effect from Arkansas to Pennsylvania for a much-anticipated winter storm that's already dumped more than a foot of snow across North Dakota and Iowa.

As the storm heads southeast toward the mid-Mississippi states Saturday into Sunday, and then toward the Northeast Sunday into Monday, more snow, ice and rain are expected.

Six to 18 inches of snow is possible in the mountains of Tennessee, North Carolina, Virginia and West Virginia.

Coastal areas of the Northeast, including Washington, D.C., Philadelphia, New York City and Boston, could see up to 3 inches of snow, though that will likely get washed away as the snow changes to rain by early Monday.

The Interstate 95 corridor will likely see a wintry mix of rain, snow and ice Sunday into Monday.

Four states -- Georgia, North Carolina, South Carolina and Virginia -- declared states of emergency Friday ahead of the storm, while West Virginia declared a statewide "state of preparedness.".

And in central North Carolina, freezing rain and sleet on top of some snow will fall.

The company is estimating that 750,000 customers in North and South Carolina could lose power due to the storm and warned customers Saturday to "prepare for possible multi-day power outages.".