Many of the indexes that were so reliable , like Enso, just don’t function the same over last 25 years. AO and NAO are still very viable and important . In my 62-63 analog I think Feb was like -9. Things from that time I add +3 to +4 to . If it’s 82-83 then I add+2 or +3. 2002-03 then +1 and maybe +2