Jul 16, 2023
A stationary front near the area forced torrential thunderstorms in a tropical airmass resulting in widespread flash flooding in NY. The first round of thunderstorms occurred early in the morning on July 16th. Another round of thunderstorms occurred later in the afternoon. The tropical airmass had CAPE values 1500 - 2000 J/kg with PWATs 2.2-2.4 inches. The torrential thunderstorms produced rainfall rates as much as 3 inches an hour. Rainfall amounts totaled a widespread 2-4 inches across Long Is
Source: NOAA National Weather Service Storm Events Database (event 1122689). 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.