As millions of Americans hunker down for the winter storm, 19 states and Washington, D.C., have declared states of emergency.

Snow, sleet and ice covered Memphis and much of Tennessee this weekend as a impactful winter storm entered the area.

Reporters from across the NPR Network are covering the storm in each state — the impact and how officials are responding.

On his own Twitter account, Cantore predicted 10 to 18 inches in NYC with regards to the pending storm. That range would double or triple the amount of snow that's already fallen in NYC to date this winter. According to National Weather Service data, 9.7 inches of snow was recorded to date this winter in New York's Central Park.

In the Northeast, forecasts have called for 12 to 18 inches, though totals will vary locally and may be lower along the immediate coast. Mr. Lamers noted the potential for a “slowly pivoting snow band” to set up over the region; on the high end, localized areas could see two feet or more.

Much of north Georgia is covered in ice Sunday morning as a winter storm moved across the state. Follow for updates.

The Nashville office of the National Weather Service upgraded the winter storm watch to a warning ahead of expected snow and ice this weekend.

Officials are optimistic the power grid will hold, but freezing rain and arctic cold could cause localized electricity outages.

A Winter Weather Advisory is in effect for much of Chicagoland for the majority of the day Sunday, followed by a Cold Weather Advisory overnight Sunday into Monday morning, with wind-chill values early Monday in the minus-20 to minus-25 range.

The National Weather Service issued a winter storm warning at 10:20 a.m. on Friday valid from Saturday 10 p.m. until Monday 1 p.m. for Northern Clinton, Northern Centre, Southern Centre, Northern Lycoming,