SPC meso analysis has low level lapse rates near -9c/km and some really impressive DCAPE along and south of I-70. Someone is lining up to get a decent storm this afternoon.
The field that my wife rides her horse on in Finksburg is so dry it feels like concrete. We desperately need a regionwide 2 to 4 inches of rain over a few days.
I stand corrected! Was in Philly at the time...what an event. Fast mover, but something like 8" - 10" of rain fell in under 12 hours. It was the only time I had school canceled for rain as a kid.