The blast of air known as the "Siberian Express" will send temps plunging for millions of Americans, with more than 100 record lows forecast Thursday.
Miranda Leitsinger, NBC: News Travel
Wed, 02/18/2015 - 8:47pm
The blast of air known as the "Siberian Express" will send temps plunging for millions of Americans, with more than 100 record lows forecast Thursday.