The snow has already started falling across the Northern Plains and the Midwest. The very cold air will continue intruding this week and take over two-thirds of the nation just in time for Christmas. Travelers should pay close attention to this forecast. Here are the forecasts written by our team of meteorologists on Wednesday. We will continue to monitor closely this event and bring you updated throughout the week.

Record frigid temps: Arctic cold on the move

Dangerous blizzard ahead Winter storm targets Plains, Midwest

Powerful winter storm Holiday travel woes: who will see delays