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  • Polar vortex - Wikipedia, the free encyclopedia

    https://en.wikipedia.org/wiki/Polar_vortex

    A polar vortex is an upper level low-pressure area, that lies near the Earth's pole.
    There are two polar vortices in the Earth's atmosphere, which overlie the North, ...

  • What Is This Polar Vortex That Is Freezing the U.S.? - Scientific ...

    http://blogs.scientificamerican.com/observations/what-is-this-polar-vo...

    Feb 14, 2016 ... As each hour passes, more and more television and radio reporters are
    attributing the insane cold to a “polar vortex” up in northern Canada.

  • The Polar Vortex Is Playing a Role in the Record April Cold in the East

    https://weather.com/science/weather-explainers/news/polar-vortex-april...

    Apr 7, 2016 ... You're hearing the term 'Polar Vortex' again -- and it's spring. We examine its role
    in chilly April in the East.

  • What is a Polar Vortex? - AccuWeather

    http://www.accuweather.com/en/weather-news/what-is-a-polar-vortex/2179...

    Nov 12, 2014 ... "The polar vortex is not a recently discovered phenomenon; in fact, it has been
    talked about in the meteorological world for decades," ...

  • NOAA's SciJinks :: What is a polar vortex?

    http://scijinks.jpl.nasa.gov/polar-vortex/

    When temperatures plunged into the sub-zero range for much of the country in
    early 2014, the term "polar vortex" became a household expression. Sure ...

  • Arctic Ozone Watch: Facts about the polar vortex - Ozone Hole Watch

    http://ozonewatch.gsfc.nasa.gov/facts/vortex_NH.html

    The stratospheric polar vortex is a large-scale region of air that is contained by a
    strong west-to-east jet stream that circles the polar region. This jet stream is ...

  • NWS Polar Vortex Information

    http://www.nws.noaa.gov/os/winter/polar_vortex.shtml

    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 ...

  • What Happened to the Polar Vortex? | Climate Central

    http://www.climatecentral.org/news/what-happened-to-the-polar-vortex-1...

    Dec 22, 2015 ... The infamous polar vortex is actually linked to the unusual warm winter weather
    in the eastern U.S., though that pattern could soon flip.

  • Polar Vortex to Bring 'Coldest Air for More Than a Decade' to ...

    http://www.nbcnews.com/news/weather/polar-vortex-bring-coldest-air-mor...

    Feb 12, 2016 ... The Northeast is being warned to brace for what could be the coldest
    temperatures in over a decade this Valentine's Day weekend.

  • What's a Polar Vortex?: The Science Behind Arctic Outbreaks ...

    https://www.wunderground.com/news/polar-vortex-plunge-science-behind-a...

    Jan 6, 2014 ... You may have heard us at weather.com and The Weather Channel mention the "
    polar vortex" during this outbreak. Let's delve into the ...