Polar Vortex II: Arctic Boogaloo?

It looks like the polar vortex may make another drunken run at the East Coast later this month. I am sure Fox will have an explanation for why the swing from 50 to -5 and back again is totally normal.

So why is the polar vortex suddenly showing up on our doorstep so often? Does climate change play a role? Here's the explanation from White House science adviser and physicist John Holdren: