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  2. What you need to know about the polar vortex

    www.aol.com/heres-know-polar-vortex-165732890.html

    Polar vortex. It's a phrase that becomes very popular has achieved buzzword status and is often used frequently during the winter as the Northern Hemisphere endures its coldest months of the year ...

  3. 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.

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

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

    The event occurred in early 2014 and was caused by a southward shift of the North Polar Vortex. Record-low temperatures also extended well into March. On January 2, an Arctic cold front initially associated with a nor'easter tracked across Canada and the United States, resulting in heavy snowfall in some areas. Temperatures fell to ...

  5. Rossby wave - Wikipedia

    en.wikipedia.org/wiki/Rossby_wave

    Meanders of the Northern Hemisphere's jet stream developing around the northern polar vortex (a, b) and finally detaching a "drop" of cold air (c). Orange: warmer masses of air; pink: jet stream; blue: colder masses of air.

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

    www.aol.com/heres-know-polar-vortex-165732130.html

    Polar vortex. It's a phrase that becomes very popular has achieved buzzword status and is often used frequently during the winter as the Northern Hemisphere endures its coldest months of the year ...

  8. Think Dallas-Fort Worth has had enough Arctic blasts? Wait ...

    www.aol.com/think-dallas-fort-worth-had...

    The polar vortex played a role in the extreme winter weather outbreak that struck Texas in February 2021, UN weather experts said. “We did have a sudden stratospheric warming in January ...

  9. Sudden stratospheric warming - Wikipedia

    en.wikipedia.org/wiki/Sudden_stratospheric_warming

    The warming is preceded by a slowing then reversal of the westerly winds in the stratospheric polar vortex, commonly measured at 60 ° latitude at the 10 hPa level. [2] SSWs occur about six times per decade in the northern hemisphere (NH), [3] and about once every 20-30 years in the southern hemisphere (SH).