The beginning of December has meant lots of snow and low temperatures in the Midwest and Northeast United States.

Forecasters have said parts of the U.S. can expect frigid temperatures in December. A first round has arrived, and more cold air could be coming.

The beginning of December has meant lots of snow and low temperatures in the Midwest and Northeast United States.

As one blast of Arctic air pushes out to sea, already a new surge of cold air, driven by a breakdown of the polar vortex, is likely to expand from central Canada and through the…