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* IMPORTANT: Next Generation Station Page

USGS 01306402 GREAT SOUTH BAY AT WEST SAYVILLE NY

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION.--Lat 40°43'15.8", long 73°05'28.5" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, at West Sayville Boat Basin, in West Sayville.
PERIOD OF RECORD.--April 2017 to current year.
GAGE.--Water-stage recorder. Datum of gage is NGVD of 1929.
REMARKS.--Satellite and telephone elevation telemeters at station.
EXTREMES OUTSIDE PERIOD OF RECORD.--Storm tide of Oct. 30, 2012, reached an elevation of 6.5 ft, from high-water mark at site 0.1 mi north.
PERIOD OF RECORD1.--April 2017 to current year. Sampling depth records for April 2017 to current year are unpublished and available in files of the Geological Survey.
PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: April 2017 to current year. SALINITY: April 2017 to current year.
INSTRUMENTATION1.--Water-quality monitor provides 6-minute-interval readings collected from 0.5 ft above bottom. Salinity record computed from specific-conductance readings.
REMARKS1.--Satellite and telephone telemeters for water temperature, specific conductance, and sampling depth parameters at station.
1 Water-Quality Records

NAVD 1988 Datum Conversion Information


Elevation observations and tidal predictions for this station are reported to NGVD 1929. To convert data to NAVD 1988 subtract 1.11 ft. To convert data to MHHW datum subtract 1.82 ft. To convert data to MLLW datum subtract 0.47 ft. These corrections vary from site to site.

NGVD 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

Water elevation, astronomical-tide elevation, and residual water level Graph updated every 15 minutes

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Gage PhotoStation image

 

This station managed by the NY Water Science Center Coram.

Available Parameters Available Period
All 9 Available Parameters for this site
  
00003 Sampling depth 2017-04-05  2019-07-18
00010 Temperature, water 2017-04-05  2019-07-18
00095 Specific cond at 25C 2017-04-05  2019-07-18
62619 Elevation, ocean/est, NGVD29 2017-04-05  2019-07-18
62619 Elevation, ocean/est, NGVD29, tidal prediction 2019-03-20  2019-09-30
62620 Elevation, ocean/est, NAVD88, NAVD88 2017-04-05  2019-07-18
62620 Elevation, ocean/est, NAVD88, tidal prediction, NAVD88 2019-03-20  2019-09-30
90860 Salinity, at 25C 2017-04-05  2019-07-18
99067 Observed elev diff 2019-03-20  2019-07-18

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Summary of all available data for this site
Instantaneous-data availability statement


Temperature, water, degrees Celsius

Most recent instantaneous value: 27.8 07-18-2019   05:36 EST
Graph of  Temperature, water, degrees Celsius

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Estuary or ocean water surface elevation above NGVD 1929, feet

Most recent instantaneous value: 1.17 07-18-2019   05:36 EST
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Estuary or ocean water surface elevation above NGVD 1929, feet, tidal prediction

Most recent instantaneous value: 0.50 07-18-2019   05:54 EST
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