Snow precipitation forecast from the National Weather Service in Sterling, VA:
Northwest Counties (Garrett to Washington): 6-7 Inches of fresh snow
Central Counties(Fredrick to Hartford down to Prince Georges): 3-5 Inches of Accumulation
Southern Counties (Charles, Calvert, St. Marys): 0-1 Inches of Accumulation
Northern Delmarva Counties (Cecil to Caroline): 1- 3 Inches of Accumulation
Southern Delmarva Counties (Dorchester to Worcester): No new snow forecasted
A Winter Storm Warning is up for the entire state except the Southern Delmarva Counties. This watch is effective until late Wednesday Night. This watch simply means that there is a potential for heavy snow to fall across the watched region. The thought is that they may issue a Winter Storm Warning tonight when the conditions allow one to be issued.
Here is the accumulation map from the National Weather Service in Sterling:
