From what i remember the north trend started on american models about 24-48 hrs before and become quite drastic with 12-18 hours up until start. Dont quote me on that though.
Sure, double digit deperatures aren't exactly easy, but it's possible
Last 10 years JAN BDL
2019 -0.3
2018 -0.9
2017 +6.6
2016 +4.1
2015 -2.8
2014 -1.6
2013 +2.5
2012 +5.5
2011 -3.1
2010 +1.4
Ten Year Average +1.1