WHO? Generally speaking, the snow chances primarily exist along the I-95 corridor and locations eastward. The primary zone of concern is lower Southern Maryland, the Northern Neck, and the Eastern Shore.
However, it is more complicated than simply saying these areas will get snow. The center of this storm will track considerably farther east than an ‘ideal’ storm track for this region, meaning somewhere in our area will be right at the storm’s edge.
Storms like these are notorious for having a ‘razors edge’ where 20 miles separate considerable snowfall from nothing at all. Exactly where that line is going to set up is different in every model, so this is a very low confidence forecast.
What we can say with relative certainty is those that live North and West of D.C. are likely out of the influences of this storm, and are unlikely to see any snowfall unless something drastically changes in the next 12 hours.
WHEN? Timing is a little easier to discern as there is pretty good computer model agreement that the storm will make its closest pass to the region Saturday morning. Southern Maryland and the Northern Neck could see snow begin to fall in the pre-dawn hours lasting through early afternoon. If D.C. sees snow, it would likely be during the morning hours between 5 a.m. and 12 p.m. before the system pulls off to the east.