2013polarvortex.gif
Image
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.
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.