I work/fly off the Arlington airport. While a 50' wide strip of runway has been de-iced and cleared, Saturday there was over 1" of ice covering the entire ramp and 95% of all taxiways.
Somehow a straight wing Citation successfully made it to the runway to depart.
Today I expect to see lots of melting that will probably produce a partially usable ramp and I would suspect the main parallel taxiway will be clear.
The big questions is whether all the runoff will make it into the drains, or will pool and re-freeze tonight.
Roads in the area are passible, but slow going.
Hope this helps
Jughead