Polar vortex-type cold wave could freeze parts of U.S. next week

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After a historically mild November, the start of meteorological winter is shaping up to be extremely cold and snowy for parts of the North America, including the U.S. 

For weeks now, ultra cold air has been building up in Siberia, as the polar vortex has been wobbling around like a bad figure skater, displaced outside of the Arctic. Now it appears the Russian Arctic will warm up dramatically, relative to normal at least, as North America cools off — potentially big time.

The frigid air is coming in two waves. The first is already spilling across the U.S. The second, potentially more potent one, is on tap for next week.  Read more…

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