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Satellite and telephone elevation, velocity, and velocity-sensor depth telemeters at station. Gaps in elevation record caused by equipment malfunctions are filled with estimated data from nearby gage 01311850 Jamaica Bay at Inwood NY.
Flow at this site is affected significantly by astronomical tides. Discharge computed with a sidelooking acoustic velocity meter. Blanks in discharge tables are due to interruption of record. By convention, the U.S. Geological Survey has established ebb (seaward) flows as positive flows and flood (landward) flows as negative flows. Unfiltered 6-minute stage, velocity, and discharge data are available upon request.
Maximum daily discharge, 47,400 ft³/s, Apr. 28, 2018, but may have been higher during period of missing record; maximum elevation, 11.75 ft, Oct. 29, 2012; minimum daily discharge, -22,400 ft³/s, Oct. 27, 2018, but may have been lower during period of missing record; minimum elevation, -5.23 ft, Mar. 9, 2005.
WATER TEMPERATURE: November 2014 to March 2019.
SALINITY: November 2014 to March 2019.
TURBIDITY: November 2014 to March 2019.
WATER TEMPERATURE: Maximum 28.2 °C Aug. 14, 2016; Minimum -1.7 °C several times throughout the period of record.
SALINITY: Maximum 38.2 psu Feb. 22, 2016; Minimum 22.2 psu Nov. 17, 2018.
TURBIDITY: Maximum 59 FNU Sept. 14, 2016; Minimum <0.1 FNU several times throughout the period of record.
Elevation observations and tidal predictions for this station are reported to NGVD 1929. To convert data to NAVD 1988 subtract 1.10 ft. To convert data to MHHW datum subtract 3.75 ft. To convert data to MLLW datum add 1.84 ft. These corrections vary from site to site.
1929 is the National Geodetic Vertical Datum of 1929,
formerly called "mean sea level" or "Sea
Level Datum of 1929." NGVD 1929 was a general
adjustment of the first-order level nets fit to mean sea
level at 26 tide gages in the US and Canada.
NAVD 1988 is the North American Vertical Datum of 1988, which is a geodetic datum derived from a general adjustment of the first-order level nets fit to 1 tide gage in eastern Canada.
MHHW is mean higher high water, which is a site-specific datum determined by averaging the highest of the 2 high tides that occur each day over a 19-year tidal epoch. For tide gages with less than 19 years of record, this datum is estimated by correlation with long-term tide gages.
MLLW is mean lower low water, which is a site-specific datum determined by averaging the lowest of the 2 low tides that occur each day over a 19-year tidal epoch. For tide gages with less than 19 years of record, this datum is estimated by correlation with long-term tide gages.
Additional sensor graph(s) available (click on graph or sensor name)
Water elevation, astronomical-tide elevation, and residual water level Graph updated every 15 minutes