National Weather Service Advanced Hydrologic Prediction Service

Visit https://www.weather.gov/owp/operations for access to new EXPERIMENTAL products and services from the National Water Center: National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook and the National Water Center Visualization Services, a suite of geospatial services depicting River Forecast Center and National Water Model information.

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Reliability of the Forecast: Forecast data shown here are guidance values only. Please refer to your local NWS office. NOTE: Graphical forecasts are not available for the Great South Bay at West Sayville (IN MLLW). During times of high water, forecast crest information can be found in the text products.Vertical Datum references a tidal datum (MLLW). For more information click on USGS link below.

Default HydrographScale to Flood Categories

Flood Categories (in feet) Major Flood Stage: 4 Moderate Flood Stage: 3.5 Flood Stage: 3 Action Stage: 0 Low Stage (in feet): -1.8 Historic Crests Currently none available. Recent Crests Currently none available. Low Water Records Currently none available.

Legend Gauge Location Disclaimer Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

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13.1	Inundation of one to three feet of water on the runways at LaGuardia Airport.
12.7	Inundation of one to two feet on taxiways at LaGuardia Airport and in Douglaston Park.
10.8	Inundation occurs on the FDR Drive in Manhattan. Elevated water levels on the East River force the water into catch basins and storm sewers and cause water to bubble and pour out of manholes on the northbound FDR Drive leading to road closures in the upper 80’s and lower 90’s. In Rye, inundation causes portions of Milton Road and Kirby Lane at the Tide Mill Basin to close.
10.2	Minor coastal flooding in Port Washington along Shore Road, Sector Drive, and Sunset Park on Main Street.
10	Milton Road and Kirby Lane in Rye close during high tide.

Latitude: 40.720833° N, Longitude: 73.091111° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 3 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available   Current/Historical Observations:

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.