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USGS 01304650 SHELTER ISLAND SOUND AT SHELTER ISLAND NY

PROVISIONAL DATA SUBJECT TO REVISION

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> Site Information
LOCATION.--Lat 41°02'39.5", long 72°19'01.1" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202,
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Peak Flow and Stage Information

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 0.95 ft. To convert data to MHHW datum subtract 2.20 ft. To convert data to MLLW datum add 1.13 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
  
2020-11-17  2021-10-27
2021-06-29  2022-09-30
2020-11-17  2021-10-27
2021-06-29  2022-09-30
2021-06-29  2021-10-27







 (7)
 

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


Estuary or ocean water surface elevation above NGVD 1929, feet

Most recent instantaneous value: 2.14 10-27-2021   09:00 EST
Graph of  Estuary or ocean water surface elevation above NGVD 1929, feet

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Estuary or ocean water surface elevation above NGVD 1929, feet, tidal prediction

Most recent instantaneous value: 0.25 10-27-2021   09:24 EST
Graph of  Estuary or ocean water surface elevation above NGVD 1929, feet

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