Aug 18, 2017
Showers and thunderstorms developed along a warm front as it lifted through the region during the morning hours. Precipitable water values around 2 resulted in rainfall rates exceeding 1.5/hour across parts of the area, producing flash flooding across parts of Suffolk and Nassau counties on Long Island. Rainfall amounts ranged from 1.5 to nearly 4 across this region, with a trained spotter in East Shoreham reporting 3.80 of rain.
Source: NOAA National Weather Service Storm Events Database (event 719552). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Suffolk County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.