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  2. 2013–14 North American winter - Wikipedia

    en.wikipedia.org/wiki/2013–14_North_American...

    By late morning on December 21, much of the rain had ended in Southwest and Central Oklahoma, where many areas had received over 0.25 inches (0.64 cm) of ice accumulation with some locations receiving over 0.50 inches (1.3 cm) or even, in localized areas, 0.75 inches (1.9 cm) of ice; isolated power outages occurred, and multiple trees and tree ...

  3. December 2017–January 2018 North American cold wave

    en.wikipedia.org/wiki/December_2017–January...

    Starting in late December as a result of the southward shift of the polar vortex, extremely cold conditions froze the eastern United States in the last few days of 2017 as well as into the new year. Following a brief respite in mid-January, cold temperatures swung back into the eastern U.S. shortly afterwards.

  4. 2014–15 North American winter - Wikipedia

    en.wikipedia.org/wiki/2014–15_North_American...

    There were greater accumulations of snow across parts of Oklahoma as well. [2] A quasi-permanent phenomenon referred to as the polar vortex may have been partly responsible for the cold weather. Temperatures in much of the United States dropped 15 to 35 °F (8.3 to 19 °C) below average by November 19, following a southward "dip" of the polar ...

  5. The Polar Vortex Explained

    www.aol.com/news/polar-vortex-explained...

    The polar vortex is a whirling cone of low pressure over the poles that's strongest in the winter months due to the increased temperature contrast between the polar regions and the mid-latitudes ...

  6. What is the polar vortex? In-depth look at how it can affect ...

    www.aol.com/polar-vortex-depth-look-affect...

    The polar vortex is a gigantic, circular area of cold air high up in the atmosphere that typically spins over the North Pole (as its name suggests). The polar vortex is a gigantic, circular area ...

  7. Polar vortex? Artic air mass? Whatever it's called, here's ...

    www.aol.com/polar-vortex-artic-air-mass...

    The polar vortex is a large area of low-pressure and cold air surrounding both of the Earth’s poles, according to the weather service. It always exists near the poles.

  8. February 2021 North American cold wave - Wikipedia

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

    The cities of Billings, Montana, and Fargo, North Dakota, experienced their longest streak of sub-zero (0 °F [−18 °C]) temperatures since at least 1983 and 1996, respectively. [ 16 ] [ 17 ] [ 18 ] Des Moines, Iowa , experienced its sixth-coldest February on record with an average temperature of 15.2 °F [−9.3 °C]. [ 19 ]

  9. 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 ...