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)

Mid-level winds associated with the displaced polar vortex early on Jan. 7, 2014. (earth.nullschool.net)

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