I was stunned when I saw the tweet on CTP's home page this morning - and then I was even more stunned as to why they posted a map that began well into the event.
I got nothing as to why, even with that said, the data is inaccurate.
The above map was for rainfall from 9am yesterday through 9am this morning. For those west of the Suskie everything you had before 9am isn't included. That's why you're seeing the heavier amounts further east.
There has been a long running misunderstanding regarding Lancaster's observations and recordings. CTP uses airport terminals for a lot of it's measurements (MDT is Harrisburg's "official" station) but in Lancaster, my understanding is that the official records are kept at MU and not at the Lancaster airport. MU recorded 2.06" which is what i went with.
There was quite a west/east gradient in our home turf yesterday with eastern locales barely eclipsing 1" while areas out west here approached 3" and a bit above.
Edit: I fully disclose that I might not understand the official recording areas correctly at all.
Heavy rain down at the southern border of VA near Petersburg is blossoming and expanding due north. If that maintains it's trajectory, areas east of the Susky have a long evening ahead of them.
That's a big fat IF...
There is a growing area of heavy rain in central VA that is aimed at our area (will miss those that have had heavy rain already wide right) so we'll see...