February 19, 2015 11:15 am Why Is It So Cold? Storm Team 4 Explains Science Behind the Siberian Express Storm Team 4 meteorologist Steve Sosna explains the science behind the bitter cold as he discusses a phenomenon known as the “Siberian Express.” Local 1:06 Latest Forecast From Storm Team 4 1:10 Latest Forecast From Storm Team 4 1:16 Latest Forecast From Storm Team 4 1:20 Latest Forecast From Storm Team 4 1:01 Latest Forecast From Storm Team 4