PD2 was bitter but the CF got west of BOS. Even January 2005 was subzero in the AM but nearing 30 during the event. 2/14/2016 was the coldest day in BOS in 59 years. It snowed to rain 48 hours later but that was a cutter. It happens more than you might think in regular coastals. I’m sure you’ve been 35 with snow starting and below freezing an hour later countless times. All through the 50s amd 60s when some of us were growing up it was a common occurrence.
Their algorithm is weird at times. With heavy rates on the front end and a cold column 925 on up how do you get upper 30s? I’m not sure it’s doable in that synoptic situation.