WeatherWeather News


What is a Polar Vortex?

Posted: 6:53 PM, Jan 29, 2019
Updated: 2019-01-29 22:11:40-05
polar vortex_winter

(WXYZ) — The term "polar vortex" is not a media creation. It is, however, meteorological jargon, and doesn't really help explain to the average person why it's so cold.

From the Glossary of Meteorology, a polar vortex is: "The planetary-scale cyclonic circulation, centered generally in the polar regions, extending from the middle troposphere to the stratosphere. The vortex is strongest in winter when the pole-to-equator temperature gradient is strongest."

It often has two centers, one near Baffin island and the other over northeast Siberia.

Basically the steering jet stream winds drove a large chunk of very cold air from the arctic into parts of North America that don't usually get it.