I disagree a bit with the National Weather Service forecast for this storm. I do not think we will see Winter Storm Watch level snows (5+ inches) in the DC/Baltimore Metro areas. I think the snow will have a difficult time sticking at first, and the shot of heavier snow they expect tomorrow evening will be of short duration, as the storm races northeast.
Nonetheless, I expect a few inches in Central Maryland with higher amounts north and west of the cities, where the changeover will happen sooner (mid-morning vs. early afternoon).
My Forecast:
NWS Forecast: