The latest High Resolution Rapid Refresh (HRRR) model showing rain changing over to snow late tonight. Image courtesy, WxBell

Steady rain will continue to fall across the Washington Metropolitan Area tonight, gradually mixing with and changing over to snow from north to south.  

A period of moderate snow is likely after 3AM across northern Maryland and around 4/5 AM along the Interstate 66 corridor in northern Virginia, DC and route 50 in Maryland.  

A slushy accumulation of less than an inch is possible on grassy surfaces.