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Current Datum Value: 5.07

Datums for 8770933, Clear Lake TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8770933, Clear Lake, TX
Status: Accepted (Nov 7 2012)
Units: Feet
Control Station: 8771450 Galveston Pier 21, TX
T.M.: 90
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.18Mean Higher-High Water
MHW1.12Mean High Water
MTL0.61Mean Tide Level
MSL0.64Mean Sea Level
DTLMean Diurnal Tide Level
MLW0.09Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-5.07Station 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
HAT1.76Highest Astronomical Tide
HAT Date & Time10/18/1988 13:24HAT Date and Time
LAT-1.02Lowest Astronomical Tide
LAT Date & Time01/18/1988 21:06LAT Date and Time
Tidal Datum Analysis Periods
12/01/1992 - 12/01/2001




Products available at 8770933 Clear Lake, TX

Revised: 08/08/2018
NOAA / National Ocean Service
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