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

Wintry conditions across a broad section of US led President Trump to approve federal emergency disaster declarations as the storm system impacted millions.

After a severe winter storm left Oklahoma blanketed in snow, temperatures are expected to stay in the single digits into the week. Here's the latest.

On Sunday at 11:57 p.m. the National Weather Service issued an updated winter storm warning in effect until Monday at noon for Mercer, Venango, Lawrence, Butler, Beaver, Allegheny, Washington and Greene counties.

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.

The National Weather Service issued an updated winter storm warning at 9:50 p.m. EST on Sunday in effect until Monday at 10 a.m. EST for Berrien County.

The NBA has postponed games in Memphis and Milwaukee because of a massive winter storm that is creating dangerous travel conditions across much of the U.S. The Dallas Mavericks tried twice to fly to Milwaukee for their Sunday night game against the

The National Weather Service in State College has issued Winter Storm Warnings for all of central Pennsylvania through 1 p.m. Monday. It covers the following counties: Somerset, B