I wonder if we do a fake -QBO thing,, '89, '05, 16 years is '21. No, I think -PNA will blast it.
(73-74 was a Strong La Nina [-16years], but Nov 15-Dec 15 was really cold pattern.. -NAO, -AO/EPO, otherwise it was really warm the rest of the Winter.
(1957 was El Nino Air temps and 500mb: https://ibb.co/8sg0VY5 https://ibb.co/Y20VVjL)