A dry slot may work in during the overnight hours cutting down on snowfall accumulations to between a dusting and one inch for most. Take a look at the latest high-resolution models (images courtesy Weatherbell):
This leads me to believe there will be more widespread delays tomorrow and the closings will be confined to southern Maryland and the Northern Neck of Virginia where some backlash snows may drop a few inches.
The storm system forming along the NC coast will start to rob the energy from the “parent low” to our west possibly causing the snow to shut off across the DC Area after midnight. If this dry slot materializes then I see a situation where if you get an inch of snow tomorrow, you’re one of the lucky ones.
Sadly the storm becomes a blizzard but moves way too far out to sea to impact our area… point is that when the NAO tanks, while it doesn’t guarantee you’re going to get hit with a blizzard, it does typically mean a Nor’easter is going to form. Well, one hell of a Nor’easter is forming tomorrow… but its track will be too far off the coast.
Spring Fever is here next week! Enjoy!
DC Storms 
Wow. This is just beeping horrible! It’s the DC snow curse again! No more winter after this week! At least we got a blizzard with backlash snow!