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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 (May 4 2004)
Units: Feet
Control Station: 8770570 Sabine Pass North, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.04Mean Higher-High Water
MHW0.99Mean High Water
MTL0.57Mean Tide Level
MSL0.60Mean Sea Level
DTLMean Diurnal Tide Level
MLW0.16Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-4.65Station Datum
GTGreat Diurnal Range
MNMean Range of Tide
DHQMean Diurnal High Water Inequality
DLQMean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HAT1.56Highest Astronomical Tide
HAT Date & Time05/16/1987 21:30HAT Date and Time
LAT-0.96Lowest Astronomical Tide
LAT Date & Time01/28/1987 15:48LAT Date and Time
Tidal Datum Analysis Periods
08/01/1996 - 12/31/2001




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