Picked up my wife and younger daughter at DCA earlier - the Potomac is completely frozen over.
16F there at 7pm, warmer here in Tenleytown (19F). Seems likely they'll get into the single digits tonight
I remember going into UVA, folks were like "UVA didn't even cancel classes during the Civil War!!" etc. Then, they cancelled classes for Hurricane Isabel, PD2, and a number of other storms over the next couple of years.