Atlanta and Houston Freeze over Polar Vortex

http://earth.nullschool.net/#2014/01/28/1800Z/wind/isobaric/500hPa/orthographic=-100.28,40.96,353

NYC Polar Vortex event 

http://earth.nullschool.net/#2014/01/22/1800Z/wind/isobaric/500hPa/orthographic=-105.38,79.71,353


Fairly simple zonal flow
Feb 19 2014