May 29, 2019
Low pressure moving along a nearly stationary boundary triggered an area of convection that moved across the region during the evening of May 29th, resulting in isolated flash flooding across northeast New Jersey. Precipitable water values were around 1.5 inches, which is in the 90th percentile for the end of May.
Source: NOAA National Weather Service Storm Events Database (event 821338). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Union County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.