I'm a bit late to this thread, but yeah, being west of 83 you're in a solid spot. You probably live in Mays Chapel, which is right near where I was for all those years. I'm guessing your average is around 26-28" especially if you're around 500'+. It's the ideal spot if you want good climo, but also don't want to be too far from Baltimore.
Some of these small marginal overnight events would have a solid coating to half inch, sometimes even over an inch, while the lower areas had next to nothing.