Round One: Late this Evening through 7pm Monday:
The forecast through Tuesday is very challenging with a myriad of precipitation types in store for much of the Washington region, mainly along and west of the interstate 95 corridor. The air mass currently in place out ahead of tonight’s storm system is very dry which will allow for surface temperatures to tumble as precipitation begins falling.
A period of accumulating snow is likely to begin late this evening continuing through the overnight along and north of the Interstate 66 corridor in Northern Virginia and the route 50 corridor in central Maryland. The simulated future-cast radar (image above courtesy WxBell) is from the latest high-resolution rapid refresh model (HRRR) showing snow (blue) breaking out late this evening (the image ends at 8am Monday).
Snow will hold on as the predominant precipitation type across the interstate 70 corridor in northern Maryland where two to four inches of accumulation is possible through 7pm Monday.
Central Virginia and southern Maryland may see a very brief period of snow late this evening before a change over to freezing rain by pre-dawn Monday.