Out of interest I filtered March of 1950-2022 to ones with a mean NAO index of -1 or lower, then split the years between 20th & 21st century.

The -NAO pattern still hits hard in N. Europe, NW. Asia, & SE. USA. Big change for western USA. pic.twitter.com/5Lizo2Uhs6

— James Peacock (@peacockreports) February 28, 2023