KPIX CBS Evening News January 5, 2014
Its called the polar vortex. Which is the scientific term meteorologists use to explain the historic cold gripping a large section of the midwest right now. The rest of us just say its stunningly cold. The polar vortex is a counterclockwise rotation of dense arctic air thats built up over the north pole. And is then pushed south by the upper jetstream. It is producing wind chills that tomorrow night could have some sections of that region feeling like 60 below zero according to the National Weather service. Wisconsin will see its coldest weather in 18 years. In des moines, iowa, they have clos...
Source: archive.org