I had a hard time leaving 1/22/2016 off my top #3. It was a great storm - one thing that scared the crap out of me was how close the dry slot got to us. I remember waking up early Saturday morning and being horrified by this huge dry slot that was moving N-NW out of the Chesapeake bay region. It made it to about the Mason/Dixon line JUST to our southeast as the pivot began. Areas affected by that dry slot lost 10-12" compared to surrounding areas that never dry slotted.
I don't recall any mixing with that storm...I might (probably) am wrong. There was a separate storm in 2017? that we tainted for several hours between maybe 5am - 9am?
Edit: March 13, 2017 we had a storm where those of us S&E of Harrisburg tainted for 4-5 hours during the morning. (See above) It was not modeled well, but Eric Horst was all over it screaming on Twitter that Lancaster was going to taint even though no model was showing it. Again, it was that onshore SE wind that did us in that morning...