Latest GFS forecasting a daily AO value near +7 from Feb 10-11. ECMWF has settled closer to +6. Either way, a record daily AO value appears on the way. The highest value I can find in the daily AO database is 5.911 on February 26th, 1990. pic.twitter.com/F9JyWRSQb5

— John Homenuk (@jhomenuk) February 5, 2020