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  • Polar vortex - Wikipedia, the free encyclopedia

    https://en.wikipedia.org/wiki/Polar_vortex - 17 hours ago

    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 a Polar Vortex? - AccuWeather

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

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

  • 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 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.

  • NOAA/NASA 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 ...

  • 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.

  • NWS Polar Vortex Information - National Weather Service

    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 ...

  • Polar vortex

    http://www.pmel.noaa.gov/arctic-zone/detect/climate-strat.shtml

    The extensive region of colder dark blue temperatures are indicative of stronger
    polar vortex winds. An anomaly is the difference from a long term average for the
     ...

  • 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 is a polar vortex? | Cornell Climate Change

    http://climatechange.cornell.edu/what-is-a-polar-vortex/

    A polar vortex is a system of upper-level winds that circle around one of the poles
    . Such circumpolar wind systems exist most of the time at both the North and ...