Datums for 8779770, Port Isabel TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8779770, Port Isabel, TX
Status: Accepted (Apr 15 2004)
Units: Feet
Control Station:
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.37Mean Higher-High Water
MHW1.31Mean High Water
MTL0.73Mean Tide Level
MSL0.81Mean Sea Level
DTL0.68Mean Diurnal Tide Level
MLW0.16Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.85North American Vertical Datum of 1988
STND-3.86Station Datum
GT1.37Great Diurnal Range
MN1.15Mean Range of Tide
DHQ0.06Mean Diurnal High Water Inequality
DLQ0.16Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide7.04Highest Observed Tide
Max Tide Date & Time08/09/1980 15:30Highest Observed Tide Date & Time
Min Tide-2.17Lowest Observed Tide
Min Tide Date & Time12/13/1989 09:18Lowest Observed Tide Date & Time
HAT2.18Highest Astronomical Tide
HAT Date & Time10/18/1989 02:30HAT Date and Time
LAT-1.00Lowest Astronomical Tide
LAT Date & Time01/18/1988 14:18LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 05/31/1984
07/01/1985 - 12/31/2001
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




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