Winter storm live updates: Heavy snow and ice creates dire travel conditions for commuters

As much as an inch of snow per hour is forecast to fall on Washington this morning, with travel conditions expected to deteriorate.

The National Weather Service office for Washington-Baltimore said that during the heaviest snow, between midnight and mid-morning today, “even primary and treated roads will be impassible.”

“It is highly recommended to postpone non-essential travel,” the office said.

Some 57 million people are under Winter weather alerts and advisories this morning as a significant Winter storm makes its way east.

The storm will move off the the Mid-Atlantic later today, but until then people in affected areas can expect “a tough morning commute and a tough evening commute,” NBC meteorologist Michelle Grossman said on “Early TODAY” this morning.