This report documents hydrologic and meteorologic aspects of flooding in northeastern New Jersey and nearby New York during April 5-7, 1984. Recorded rainfall varied from 2 inches to slightly more than 8 inches within the study area. Peak stages and discharges at 46 streamflow-gaging sites are tabulated and compared to previous maximums. Thirteen gages in the Passaic River basin recorded new peaks of record. Flood-crest elevations are presented for nine stream reaches in the Passaic River basin where the most severe flooding occurred. The flooding caused 3 deaths, $250 million in property damages, and forced 6,000 people from their homes. (Author 's abstract)