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Datums for 8770475, Port Arthur TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8770475, Port Arthur, TX
Status: Accepted (Jun 27 2019)
Units: Feet
Control Station: 8770570 Sabine Pass North, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.03Mean Higher-High Water
MHW0.98Mean High Water
MTL0.56Mean Tide Level
MSL0.59Mean Sea Level
DTL0.52Mean Diurnal Tide Level
MLW0.15Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.46North American Vertical Datum of 1988
STND-4.59Station Datum
GT1.04Great Diurnal Range
MN0.83Mean Range of Tide
DHQ0.06Mean Diurnal High Water Inequality
DLQ0.15Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide4.78Highest Observed Tide
Max Tide Date & Time09/03/2017 09:42Highest Observed Tide Date & Time
Min Tide-2.13Lowest Observed Tide
Min Tide Date & Time12/21/2018 16:00Lowest Observed Tide Date & Time
HAT1.55Highest Astronomical Tide
HAT Date & Time05/16/1987 21:30HAT Date and Time
LAT-0.97Lowest Astronomical Tide
LAT Date & Time01/28/1987 15:48LAT Date and Time
Tidal Datum Analysis Periods
08/01/2016 - 07/31/2018




Products available at 8770475 Port Arthur, TX

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