The polar vortex is a mass of low-pressure cold air that circulates in the stratosphere above the arctic.<br />And according to Business Insider, it's about to pay the northeastern part of the US a visit this weekend.<br />The region is expected to see temperatures in the 30s and 40s on Saturday and Sunday. Some New England states could get snow.<br />The National Weather Service warned Americans to expect "widespread record and near record low" temperatures.<br />If this same pattern was going on during January and February, we would be in a deep freeze with frequent snowstorms in the eastern United States. Paul Pastelok, AccuWeather forecaster<br />The last polar-vortex event in the US was in 2019. Temps in the Midwest plummeted to minus 66 degrees Fahrenheit with wind chill.
