File talk:November2013 polar vortex geopotentialheight mean Large.jpg

"Beginning on January 2, 2014, sudden stratospheric warming (SSW)[dubious – discuss] led to the breakdown of the semi-permanent feature across the Arctic known as the polar vortex." Wiki

https://www.ncdc.noaa.gov/gibbs/html/GOE-13/IR/2014-01-05-12

"Beginning on January 2, 2014, the Subtropical Jet Stream pushed down semi-permanent cold dry air of Canada across the Arctic known as the polar vortex into Michigan." Bill Sovereign

We can also see three Pacific Jets coming into western North America; Alaska, Washington, Mexico. The Subtropical Jet Stream is from the Mexican Pacific Ocean. "There's a lot more here folks." William Fichtner

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