Aug 21, 2021
Showers and thunderstorms streaming northward well ahead of approaching Hurricane Henri resulted in flash flooding across portions of northeast New Jersey. This rainfall developed in a moisture-rich environment, with the 8pm sounding from Upton, NY recording precipitable water values around 2.25 inches. Rainfall totals from this predecessor rainfall event ranged from 1-4 inches, with the ASOS at Teterboro Airport reporting 2.40 inches and a COOP observer in Harrison reporting 2.91 inches.
Source: NOAA National Weather Service Storm Events Database (event 982593). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Essex County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.