I don't know about MDT, but I had over 11" a few years ago and none of it was tropical. There was a day in August when Maytown - Mount Joy - Manheim all picked up between 6-11" of rain in about 2-3 hours.
I got exactly a quarter inch yesterday morning and another quarter inch last night. 15 miles from me received almost 5X what I got.
As soon as the heavens opened, it shut off. .07" from that 2 minute shower.
This is honestly why I do not care what happens at MDT. What happens or doesn't happen at MDT has zero bearing on my sensible weather and my weather statistics. I don't understand why some get hung up on what MDT records...none of us live on the tarmac.
Per the map you posted earlier regarding 3 day rain totals, the area getting hit hard right now has been dryer than what I've been, which is good.
I'm at 3.74" since Thursday.