The National Weather Service has upgraded counties in Maryland, Virginia, West Virginia and Pennsylvania to a Winter Storm Warning. This indicates that conditions Monday night into Tuesday could be severe with accumulations of at least 6-10", possibly more.
This storm is still a fluid situation, so stay tuned for more updates.
Ahead of the storm, MetroAccess is suspending service beginning Monday at 4pm through Tuesday.
The National Weather Service has issued the following graphic to show the "Most Likely Snowfall" expected as of now.