Data and Station Information for GRAND ISLE

Station Information

Station ID:	526
Latitude:	29.263333
Longitude:	-89.956667
Coastline code:	940
Station code:	21
Country:	UNITED STATES
Time span of data:	1947 – 2023
Completeness (%):	96
Date of last update:	10 Jan 2024

Green Arrow:	Current Station
Yellow Marker:	Neighbouring RLR Station
Red Marker:	Neighbouring Metric Station

Please note: In many cases, the station position in our database is accurate to only one minute. Thus, the tide gauge may not appear to be on the coast.

Tide Gauge Data

Plot of monthly mean sea level data at GRAND ISLE.

Link to larger image of monthly data plot.
Download monthly mean sea level data.

Plot of annual mean sea level data at GRAND ISLE.

Link to larger image of annual data plot.
Download annual mean sea level data.

Download metric sea level data. Use only with extreme caution. NOTE: If some of the data are red in the plots above, the 'flag for attention' is set. Please see the documentation below.

Additional Data Sources (guide to additional data sources)

Nearby GNSS Stations from SONEL: GRIS
Nearby Real Time Stations from VLIZ: gila
Research Quality Data from UHSLC station 765: hourly and daily

Station Documentation

Link to RLR information.

Documentation added 1993-07-08

Grand Isle 940/021 RLR(1978) is 8.0m below BM 6

Documentation added 1993-07-29

Many stations on the Gulf coast have large values for September 1961.

Documentation added 1994-07-14

For a discussion of submergence near to Eugene Island and Grand Isle/Bayou Rigaud, see Emery and Aubrey (Sea Levels, Land Levels and Tide Gauges), 1991, Springer-Verlag, page 40.

Data Authority

N.O.A.A. / N.O.S.
N/oes33, Ssmc4, Room 6531
1305 East-West Highway
Silver Spring,
MD 20910

Data

Data Notes

Extracted from Database

GRAND ISLE