Polar Vortex

The polar vortex is a large area of low pressure and cold air surrounding both of the Earth’s poles.

  • It always exists near the poles, but weakens in summer and strengthens in winter.
  • The term "vortex" refers to the counter-clockwise flow of air that helps keep the colder air near the Poles.
  • Many times, during winter in the northern hemisphere, the polar vortex will expand, sending cold air southward with the jet ....
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