A rare Stratospheric Warming event has begun over the South Pole : https://www.severe-weather.eu/global-weather/polar-vortex-st…winter-fa/ Comments: https://news.ycombinator.com/item?id=40973342
A Stratospheric Warming event begins over the South Pole, with unusual intensity, raising question about a potential impact on the Northern Hemisphere and the U.S. Winter weather.
Looks interesting.