Polar vortex to send bitter cold to the U.S. including DC area
The polar vortex is a ring of cold air that typically circles the Arctic. A strong jet stream essentially acts like a fence, keeping it locked there. If there's any weakening in the jet stream (the fence), the frigid air can become unstable and spill out. This sends the normally trapped cold air much farther south.
1don MSN
A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.
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Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.
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Frigid arctic air due to a polar vortex is about to send temperatures plunging for millions of Americans across the U.S., and ...
The vast majority of Americans are about to get an extended taste of frigid Siberian weather. Another polar vortex disruption ...
Snow is expected to taper off around Denver by the early afternoon, while temperatures will remain well-below freezing ...
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