NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

Notice: We are experiencing a wide spread communication outage affecting the availability of water level and meteorological data for some of our stations, as well as several critical bridge clearance measurements. We are diligently working to resolve this data outage. Please direct all questions to tide.predictions@noaa.gov or call (301) 713-2815.
NOTICE: Data for determining a datum at this station was collected using non-standard methodologies and may not meet CO-OPS highest level of accuracy of 2 cm (0.8 in). The estimated error associated with the average six-minute water level observations relative to datum is expected to be within +/- 4.0 - 13.0 cm (1.6 - 5.1 in) at 95% confidence. Recognizing that these data can be used for certain applications CO-OPS is making these data available to its users with restraint. Users are cautioned to consider the accuracy of these data before using them for critical navigational or coastal engineering purposes.

Datums for 8760922, Pilots Station East, S.W. Pass LA


NOTICE OF PROVISIONAL DATUM These datums and any data referred to said datum are PROVISIONAL and subject to revision until they have been thoroughly reviewed and received final approval. Subsequent review based on field inspections and additional measurements may result in revisions to the data and datums. Data users are cautioned to consider the conditional nature of this information before using it for critical decisions such as those that concern physical or public safety. Only after meeting all standards for quality control assurance will the datums be classified as Accepted Datums.
NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8760922, Pilots Station East, S.W. Pass, LA
Status: Accepted (Feb 27 2018)
Units: Feet
Control Station: 8761724 Grand Isle, LA
T.M.: 90
Epoch: 2012-2016
Datum: MLLW
DatumValueDescription
MHHW1.17Mean Higher-High Water
MHW1.16Mean High Water
MTL0.59Mean Tide Level
MSL0.59Mean Sea Level
DTL0.59Mean Diurnal Tide Level
MLW0.02Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-30.84Station Datum
GT1.17Great Diurnal Range
MN1.14Mean Range of Tide
DHQ0.01Mean Diurnal High Water Inequality
DLQ0.02Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide6.71Highest Observed Tide
Max Tide Date & Time08/29/2005 09:30Highest Observed Tide Date & Time
Min Tide-2.18Lowest Observed Tide
Min Tide Date & Time12/13/2004 14:00Lowest Observed Tide Date & Time
HAT1.97Highest Astronomical Tide
HAT Date & Time10/18/1989 03:18HAT Date and Time
LAT-1.03Lowest Astronomical Tide
LAT Date & Time01/27/1987 11:06LAT Date and Time
Tidal Datum Analysis Periods
09/01/2004 - 08/31/2008
04/01/2010 - 03/31/2012
05/01/2012 - 04/30/2017




Products available at 8760922 Pilots Station East, S.W. Pass, LA

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services