Miller A Storms are the winter events that often come from The Gulf of Mexico. These can take on new form as a coastal Nor’Easter.
The track is important as these can bring in warmer air from the Atlantic, resulting in that dreaded mix or rain on Delmarva and by the Chesapeake Bay.
Along I-95 and within about 10-20 miles can be the dividing line of snow and rain. This is explained in the Maryland Snow page.
These are one of the two Big Snow types of storms. Not all, but some can be the ones that produce double digit snowfall totals, if the conditions are right.
These can produce 10+” inches in the colder inland suburbs of central Maryland/southern PA, 1/2 that amount or less in the cities, and even less or all rain near Annapolis, southern Maryland, and the Eastern Shore.