The latest forecast for Northern Virginia is for rain to begin in the late afternoon on Sunday, turning into snow after 9 p.m. The snow keeps falling through Monday morning and into Monday afternoon before turning into a mix of rain and snow.
The forecast for Fredericksburg calls for more of a mix of rain and snow Sunday night, turning to snow in the overnight hours early Monday morning.
Between half an inch and three-quarters of an inch is forecasted Sunday night. It's too early for a Monday accumulation forecast from the NWS.