Coastal Flood — Southeast Suffolk, New York

2017-10-30 · Southeast Suffolk, New York

Event narrative

The USGS tidal gauge in Moriches at Moriches Bay recorded a peak water level of 5.4 ft. MLLW at 530 am EST, which is the moderate coastal flood threshold.

Numerous properties experienced 1 to 2 feet of inundation along Dune Rd. in Westhampton Beach. In Eastport, South Bay Avenue Marina was inundated by around 1 foot of water. In Mastic, widespread minor to moderate inundation of 1 to 3 feet occurred over roads and onto properties from Trafalgar and Pine Tree Drives and points to the southwest, and Trafalgar and Grandview Drives and points to the southeast. Smith Point Park in Mastic was also inundated.

Wider weather episode

A southern low rapidly intensified as it raced up the East coast Sunday, and over NYC Sunday Night. This low brought a rapid onset but relatively brief period of SE gale to storm force winds Sunday evening, shifting to WNW gales Monday morning. High seas built into Monday Morning.

Moderate coastal flooding occurred along the Great South Bay with the Monday morning high tide. Surge continued to increase well after peak onshore winds, with water levels receding briefly or not at all during low tide. The westerly wind shift helped slosh surge into eastern portions of the Great South Bay, with recession below flood levels taking several hours after high tide.

Source: NOAA Storm Events Database, event_id 725428. Narrative written by the NWS forecast office that issued the report.