The latest ECMWF EPS forecasts the Arctic Oscillation (AO) to rise back above +4 next week, and approach/exceed +5 several times through February 25th. It’s quite possible that February 2020 ends up as one of the most positive AO months on record if this is correct. pic.twitter.com/GKbKpvCYSq

— John Homenuk (@jhomenuk) February 12, 2020