The positive Arctic Oscillation regime reached a new extreme yesterday, with a daily AO index of +6.5, a new all-time (1950-present) record, and beating the record set/tied 10 days ago. On a monthly basis, Feb 2020 will end near Feb 1989 and 1990. https://t.co/FnOQWU9pvd pic.twitter.com/ChGepzGu2R

— World Climate Service (@WorldClimateSvc) February 22, 2020