The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

A rapidly intensifying bomb cyclone near Hudson Bay and polar vortex disruption are bringing freezing temperatures and ...

The polar vortex can commonly be disrupted during the winter and is known to cause an Arctic outbreak in the United States.

Find your long johns, break out the thick socks and raid the supermarket. After a month of relatively mild winter weather, the Midwest and the East Coast are bracing for what is becoming a seasonal ...