You start with mostly cloudy skies and cold, northwest flow for a day or two. Around mid afternoon on day three, warm air moves in aloft and starts precip as freezing rain. It then flips to steady, moderate snow overnight. Precipitation falls without the benefit of sunshine to melt it off overnight, and road crews were unable to put pretreatment down due to rain. The snow encapsulates power lines and trees overnight, leading to over 250,000 outages across the DC - Baltimore region. Gusty NW winds of around 20 mph occur after the storm exits around sunrise. Early sunshine fades behind a cirrus shield the next day as a potent clipper system dives south into Kentucky. An additional 4" - 8" of fluffy snow occurs during the afternoon and evening.