LIVE STREAM: Coverage of Northeast Blizzard hitting New York, D.C., Boston

A Nor'easter is dumping snow and pushing winds up the US East Coast -- the beginnings of a monster storm that has placed 31 million people under a blizzard warning.

So far, nearly 7,700 US flights have been canceled through Wednesday and thousands of schools have closed due to what could be a historic storm. Winter storm warnings and watches have been hoisted over a region stretching from West Virginia into Maine.

Weather models Tuesday morning showed that the heaviest snow, perhaps more than 2 feet, could hit northeastern Pennsylvania, New York's Hudson Valley and parts of Vermont and New Hampshire.

WATCH LIVE COVERAGE BELOW: Watch live scenes a of major nor'easter threatening cities from Washington, D.C., to New York City and Boston.