As you know, I'm not a meterologist but I know the answer for your question... There is a pocket of low pressure that's been hanging over DC's West and a high pressure system off the coast. High pressure pushes air toward the low pressure, causing wind. The jetstream over DC usually flows in an s-curve shape but West to East but this last week or so, it's been doing a loop up to your North, keeping the pressure systems where they are and preventing much new weather from moving in. There is, however, a slower moving system making it's way from Kentucky that should be there in the next few days and push that wind on out of there.
(I spend a little too much time looking at satellite weather patterns because our weather people up here aren't that good.)