Mid-level winds associated with the displaced polar vortex early on Jan. 7, 2014. (earth.nullschool.net) Published January 7, 2014 at 1080 × 760 in Polar Vortex Unveiled Mid-level winds associated with the displaced polar vortex early on Jan. 7, 2014. (earth.nullschool.net) Mid-level winds associated with the displaced polar vortex early on Jan. 7, 2014. (earth.nullschool.net)