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2. Explainer: What is the polar vortex and why is it so cold?

   www.aol.com/news/explainer-polar-vortex-why-cold...

   As ominous as the term polar vortex sounds, meteorologists say the phenomenon is not new, nor despite its sound does it refer to a cyclone of cold or a freakishly dangerous storm. "The term 'polar ...

3. Polar vortex could bring an unfavorable end to Rochester's winter

   www.aol.com/polar-vortex-could-bring-unfavorable...

   The polar vortex is not synonymous with a cold snap. In fact, the stratosphere is 10 to 30 miles above the earth’s surface and above the polar jet stream and other systems that create most ...

4. Harsh cold from polar vortex envelops north-central US

   www.aol.com/lifestyle/harsh-cold-polar-vortex...

   The harshest cold of the winter so far is not showing any signs of relenting anytime soon across the north-central United States. Due in part to a shift in the polar vortex, dangerously low ...

5. Here's what you need to know about the polar vortex

   www.aol.com/lifestyle/heres-know-polar-vortex...

   AccuWeather forecasters break down the science behind the polar vortex and how it can influence the weather for locations thousands of miles away. While the name for this phenomenon may sound ...

6. January–February 2019 North American cold wave - Wikipedia

   en.wikipedia.org/wiki/January–February_2019...

   'Chicago Beach Keeps Locals Warm During Polar Vortex' – video new report from Voice of America. Chicago river frozen during 2019 polar vortex February 1, 2019. In the Chicago area, temperatures plummeted as low as −23 °F (−31 °C) at O'Hare International Airport on January 30, with a windchill of −52 °F (−47 °C).

7. What is the ‘polar vortex’ that’s pushing dangerously frigid ...

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8. February 2021 North American cold wave - Wikipedia

   en.wikipedia.org/wiki/February_2021_North...

   The cold was caused by a southern migration of the polar vortex, likely caused by a sudden stratospheric warming event that occurred the prior month. Temperatures fell as much as 25–50 °F (14–28 °C) below average as far south as the Gulf Coast.

9. January–March 2014 North American cold wave - Wikipedia

   en.wikipedia.org/wiki/January–March_2014_North...

   Despite the abnormally cold winter over sections of North America and much of Russia, most of the globe saw either average or above-average temperatures during the first four months of 2014. [118] In fact, during the cold wave, North America saw much colder temperatures than Sochi, Russia which during the time was hosting the 2014 Winter Olympics.