Monday evening update: The Winter Storm Watch was dropped for Charles, Calvert and St. Mary's counties but remains in effect for the other counties listed below...
From Monday morning: The National Weather Service has issued a Winter Storm Watch for Tuesday afternoon and night for our eastern suburbs, which includes Prince George's, Anne Arundel, Howard, Charles, Calvert, and St. Mary's counties.
The watch was issued for the potential for 5 or more inches of snow (and snow mixed with sleet in Calvert, Charles, and St. Mary's county) in these areas but is not a guarantee. The latest model data do not indicate these areas will get that much snow and I think the NWS is erring on the side of caution with these watches.
If data later on suggest these criteria will be met, the NWS would upgrade these watches to warnings. However, in order for winter storm warning criteria snows to be met in these regions, the coastal low would have to intensify more quickly than shown in the current models.
Capital Weather Gang's forecast, for the moment, is not for a winter storm warning criteria event in the metro region although it is more likely from Baltimore and to the northeast. We'll have another update mid-to-late morning.