Aug 2, 2017
An approaching upper level disturbance combined with increasing instability resulted in the development of afternoon showers and thunderstorms. With weak steering flow and precipitable water values of 1.5 or greater, these storms produced flash flooding across parts of Passaic County. Over one inch of rain was reported in southern Passaic County, with a CoCoRaHS gauge in Little Falls Township recording 1.59 of rain.
Source: NOAA National Weather Service Storm Events Database (event 717831). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Passaic County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.