The jet stream for January 6, 2014 (pale blue in map to right) follows a wavy pattern over the whole Northern hemisphere, and the path of the jet stream is out of the north over the central U.S., bringing cold air southward from the Arctic and producing record cold temperatures for the eastern half of the U.S.. Regions of light blue color show the counter-clockwise path of the jet stream for January 6, 2014. The map in white near the bottom center shows the outline of the U.S.