Again, we are talking about representativeness, not accuracy. DCA is accurate, but not representative of the vast majority of the DC-area population. There's nothing to be "fixed". You are free to use Andrews or IAD or BWI for your temperatures.
Because mine started earlier I’m not going to hit any of those metrics. Was still 50 at 4pm and then took an additional dive. Still, 65 to the 20s is a tumble.
If this were early winter or pre-storm, we would be talking about how impressive a temperature drop this was. I’m down 35 degrees from my 11am high. Got a second surge of wind at about 8pm too.
I should add that the 12z Euro isn't all that far off from the NAM with that vort, but it swings the southern part through faster. So, yeah, unfortunately not as easy as a big bowling ball coming across the country.