One of my favourite @ECMWF charts is the monthly breakdown of the SEAS5 NAO predictions. The October update shows an increased likelihood of negative NAO during November & December, before shifting to positive for JFM. Weak signal, however. https://t.co/UbupQr0QRt pic.twitter.com/1Vcv9Q4Yo9

— Dr Simon Lee (@SimonLeeWx) October 7, 2020