Good to see stuff is making it to the ground quickly...even with the lighter returns. 12z RAOB from IAD only had a thin area of really dry air just below 850 mb so it shouldn't take too long to get rid of that.
For the northern folks, the LWX 1.5° base reflectivity scan seems to show some echoes increasing to your west from Cascade MD through Taneytown...looks like the northern jackpot zone is beginning to take shape.
Remember to report your first flakes using mPING app on your smart phone. The data help radar meteorologists and operational staff understand where precipitation is making it to the ground!
I purchased my first snowblower in the fall of 2016 when we moved to Maryland. We've been cursed since. I'm sacrificing it on the front lawn this weekend in front of the nativity scene to see if that changes thing.