NASA video shows polar vortex shifting to spread frigid air across the U.S. - NBC News

1. NASA video shows polar vortex shifting to spread frigid air across the U.S.  NBC News
2. Here’s the polar vortex from NASA’s heat-mapping satellite  New York Post
3. Watch the Polar Vortex Cast Its Chill Over North America in This Satellite's-Eye View  Space.com
4. NASA and NOAA: This is what the polar vortex looks like from space  CNBC
5. NASA reveals infrared replay of polar vortex invading Minnesota  Bring Me The News
6. View full coverage on Google News

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