Flash flood warnings in place for Morris County. I've easily received 2" of rain over night. Thankfully I live on top of the hills. I feel bad for the people in the valleys, this might causes some issues.
Edit: NEXRAD seems to indicate a nice swath of 2-5" over northern New Jersey; I would think the rivers prone to going over will do so later today/tomorrow. The pompton, pequannock, Passaic, etc.