Some serious rainfall expected, with the heaviest rains forecast to be right over the Passaic and Raritan River basins. The 2nd graphic shows the overview of predicted max flooding levels for all of the major river basins in our region, with the purple ones indicating major flood stage being reached and the red ones indicating moderate flood stage being reached. One can then click on the dot and get the full flooding forecast for this storm for any individual river gauge - I included the Passaic at Pine Brook (showing major flooding) and the Raritan at Bound Brook (showing almost major flooding), below, as examples.
This is exactly the kind of important rainfall/flooding data one can get from a friggin app. Not.
https://www.weather.gov/marfc/