Sep 12, 2018
Showers and thunderstorms developed along a stationary front located just north of Long Island during the afternoon of September 12th. The 8am sounding from Upton, NY recorded a precipitable water value of 2.16 inches, a record for the date based on the Storm Prediction Center's sounding climatology. This resulted in very heavy downpours and flash flooding over parts of northern Suffolk County. A CoCoRaHS observer in Port Jefferson Station recorded 2.98 inches of rain over a period of about thre
Source: NOAA National Weather Service Storm Events Database (event 784184). 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.