Snow forecasts for the DC metro area are always, notoriously wrong. They seem to only accurately forecast the DMV area (DC, Maryland & Virginia) if it's the areas west & east of DC. But for DC proper and it's immediate outside neighborhoods, it is truly a guessing game.
Right now, the guess is 3"- 5" Sunday through Monday. That means we'll either get nothing but a dusting on the grass, or snowmageddon!