USGS Current Conditions for USGS 01305575 GREAT SOUTH BAY AT WATCH HILL ON FIRE ISLAND NY

USGS 01305575 GREAT SOUTH BAY AT WATCH HILL ON FIRE ISLAND NY

PROVISIONAL DATA SUBJECT TO REVISION

Click to hidestation-specific text

LOCATION.--Lat 40°41'29.0", long 72°59'22.9" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, at National Park Service Watch Hill Marina, on Fire Island.
PERIOD OF RECORD.--March 2016 to current year.
GAGE.--Water-stage recorder. Datum of gage is NGVD of 1929.
REMARKS.--Satellite and telephone elevation telemeters at station. Gaps in record caused by equipment malfunctions are filled with estimated data from nearby gage 01306402 Great South Bay at West Sayville NY.
EXTREMES FOR PERIOD OF RECORD.--Maximum elevation, 5.18 ft above NGVD of 1929, Jan. 10, 2024; minimum elevation, -1.38 ft above NGVD of 1929, Jan. 6, 2018.
EXTREMES OUTSIDE PERIOD OF RECORD.--Storm tide of Oct. 30, 2012, reached an elevation of 6.7 ft, from high-water mark at site 3.7 mi northwest.

WaterAlert – get an email or text (SMS) alert based on your chosen threshold.

Rating Information

Additional Site 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 1.06 ft. To convert data to MHHW datum subtract 1.77 ft. To convert data to MLLW datum subtract 0.36 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)

Station image

Water elevation, astronomical-tide
elevation, and residual water level
Graph updated every 15 minutes
Alternate link to graph

Wind speed, wind gust speed,
and barometric pressure
Graph updated hourly
Alternate link to graph

This station managed by the NY Water Science Center Coram.

Available Parameters	Available Period
All 11 Available Parameters for this site
00020 Temperature, air	2024-07-25	2024-11-22
00036 Wind direction	2024-07-25	2024-11-22
00045 Precipitation	2024-07-25	2024-11-22
00052 Relative humidity	2024-07-25	2024-11-22
61727 Wind gust speed	2024-07-25	2024-11-22
61729 Wind gust direction	2024-07-25	2024-11-22
62608 Solar radiation down	2024-07-25	2024-11-22
62619 Elevation, ocean/est, NGVD29	2016-04-18	2024-11-22
62620 Elevation, ocean/est, NAVD88, NAVD88	2016-04-18	2024-11-22
75969 BarometricPressUncor	2024-07-25	2024-11-22
82127 Wind speed	2024-07-25	2024-11-22