A video explaining the polar vortex in the Northern hemisphere

polar vortex video

‘Polar vortex’ pushes dangerously cold temps into U.S. Midwest


CHICAGO – A whirlpool of frigid, dense air known as a “polar vortex” descended Monday into much of the United States, pummelling parts of the country with a dangerous cold that could break decades-old records with wind chill warnings stretching from Montana to Alabama.


5 comments on “POLAR VORTEX

  1. Polar Vortex to Make Encore Performance


    Alex Sosnowski

    By Alex Sosnowski, Expert Senior Meteorologist

    February 23, 2014; 5:10 AM

    effect of frozen lakes on USA weather feb 2014

    Signs are pointing toward another southward dip from the polar vortex. The polar vortex is essentially a mass of very cold air that usually hangs out above the Arctic Circle and is contained by strong winds.

    According to Long Range Expert Mark Paquette, “We noticed a minor Sudden Stratospheric Warming event taking place back on Feb. 6-7, 2014.”

    (@rleduc123 tweeted: “Polar Vortex 3 – The Saga Continues!”)

    When sudden warming takes place high in the atmosphere, it initiates a chain of events that tends to displace the polar vortex between 14 and 30 days later.

    “In addition to the exact timing of the cold outbreak is you never know for sure initially which continent the cold air will be directed,” Paquette said, “This time it appears it will take aim at the eastern part of North America.”

    Cold air is poised to return in stages to the North Central states, the Northeast and interior South beginning this week.
    One reason for the cold blast carrying more weight than you might expect is the fact that the Great Lakes are largely frozen over. The air will not moderate to the extent as if most of the lakes were not frozen.

    polarvortex 3 winter USA 2014


  2. Polar Vortex in Summer? Not Exactly, Experts Say

    By Kelly Dickerson, Staff Writer | July 14, 2014 05:26pm ET
    “Headlines warn that the cold front could herald a return of the “polar vortex,” but experts are saying otherwise.

    Polar vortexes typically develop around the North Pole during most winters. They form in a pattern similar to that of tropical hurricanes, except the winds spinning around the calm center of a polar vortex are freezing cold.

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