Wow, check out the difference in the positioning of the high between the 3km NAM nest and the HRRR!
https://www.tropicaltidbits.com/analysis/models/?model=hrrr®ion=us&pkg=ref_frzn&runtime=2020121500&fh=18
I've said this before, but Mike Thomas's Facebook page from Fox5 is a really good page to follow! He really dives into the technicals. He believes D.C. has a good chance for a very brief heavy burst of snow before the rain takes over.