Polar Vortex in the Forecast Again

Meteorologists have blamed a phenomenon called the polar vortex for the bitter cold that has descended on much of the central and eastern United States in last week of January.

What is Polar Vortex?

  • There are not one but two polar vortexes in each hemisphere, North and South.
  • One exists in the lowest layer of the atmosphere, the troposphere, which is where we live and where the weather happens.
  • The other exists in the second-lowest, called the stratosphere, which is a shroud of thin air that gets warmer at higher altitudes.
  • If the two polar vortexes line up just right, the Lower ....

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