I use to work for fedex express some years ago. I had to make a early morning run from my station in Crofton. Crofton is about 18 miles south of BWI. I remember a lot of times that I would see frost around the airport but not anywhere else. It seems like it's so open there that it radiates well during the right conditions. I think the temps are probably accurate. One thing that still pisses me off is the slant stick measurement in the 2016 storm. They claimed they had 29" and that beat the Nickerbocker storm. Pffff. No way. If anything, Feb 2010 beat it but they under measured that one. In 2016 I had about 20". No more then 18" at once. It settled during the dry slot.
Man... these edibles i made are no joke lol