100 hPa eddy heat flux averaged over the last 45 days is approaching the 10th %ile in the Arctic & breaking record minima in the Antarctic! Consequently [e.g. Polvani & Waugh 2004 https://t.co/0QvQ87jMlY], the Antarctic vortex is record-strong & the Arctic vortex is accelerating. pic.twitter.com/YJqs7Fjwtl

— Dr Simon Lee (@SimonLeeWx) November 18, 2020