In December of the historical SSW events, higher heights occurred at higher latitudes & a Greenland block developed.

This pattern was favorable for coastal storms in the eastern U.S. & European winter storms.

The SSW is 1 of many climate drivers. There are no 1:1 relationships! pic.twitter.com/IPMPKIPhn3

— Ben Noll (@BenNollWeather) September 18, 2021