Our region's extreme run

[PrinceFrederickWx]

17 hours ago, nw baltimore wx said:

I thought that 1979 leading up to PD1 was colder, but I guess not. Also thought 1977 was in the mix too.

I’m surprised there’s no Jan. 1977 too. Also Jan. 1994, Feb. 2015 and Dec. 2017. I wasn’t even aware 1970 had any cold outbreak. Interesting chart! Although this is for <28; maybe <32 would have different results.