wow absolutely fascinating Chris, each arctic outbreak had its own personality!!
Something else I find interesting is how much more frequent the subzero arctic outbreaks were prior to 1985 and how rare they have become since then. January 1994 and then nothing until February 2016.
The ones I remember offhand were January 1977, December 1980, January 1981 (two that season!), January 1982, January 1984, January 1985..... then a gap...... January 1994 (two that month)....... then an even larger gap and then February 2016.
We probably would have had a subzero arctic outbreak in the 1982-83 winter too if we didn't have a super el nino! Otherwise we had one in every winter from 1980-81 through 1984-85!
I'm defining subzero arctic outbreak as one in one one of the four metro area stations (NYC, EWR, LGA, JFK) reached 0 or lower for at least one low. Did I miss any or were those the ones that happened in the period starting from the 1976-77 winter until now?