Winter 19-20 goes down as the 2nd least wintry east of the Rockies when calculating a sum total of these teleconnections - AO/NAO/PNA/EPO

A thread ->

I averaged the daily values from Dec-Mar of the AO, NAO, PNA, and EPO teleconnection indices, then took a sum total. I had to reverse the sign of the PNA so that it matched up with the others for the sum total (i.e. standard -PNA and +AO/NAO/EPO are warm east of the Rockies)

Here is the 500mb pattern of the top 5 least wintry years east of the Rockies per the teleconnection sum total

Here is the 850mb temperature pattern of the top 5 least wintry years east of the Rockies per the teleconnection sum total

Here are the top 10 most wintry years east of the Rockies per the teleconnection sum total.

2009-2010 wins in a landslide

Here is the 500mb pattern of the top 5 most wintry years east of the Rockies per the teleconnection sum total

Here is the 850mb temperature pattern of the top 5 most wintry years east of the Rockies per the teleconnection sum total

Lastly, here is an image showing how weak El Ninos have changed in recent years (Post 2000 minus Pre 2000 weak El Nino winters on the image). Weak El Ninos post 2000 have shown a greater propensity for ridging in the N Pacific and on the US East Coast, along with more +AO / +NAO