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Current Datum Value: 1.78

Datums for 9439026, ASTORIA, YOUNGS BAY OR


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9439026, ASTORIA, YOUNGS BAY, OR
Status: Accepted (Jul 9 2004)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW8.80Mean Higher-High Water
MHW8.10Mean High Water
MTL4.68Mean Tide Level
MSL4.68Mean Sea Level
DTL4.40Mean Diurnal Tide Level
MLW1.25Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.17North American Vertical Datum of 1988
STND-1.78Station Datum
GT8.80Great Diurnal Range
MN6.85Mean Range of Tide
DHQ0.70Mean Diurnal High Water Inequality
DLQ1.25Mean Diurnal Low Water Inequality
HWI8.94Greenwich High Water Interval (in hours)
LWI2.62Greenwich 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
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
07/01/1981 - 07/31/1981
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 9439026 ASTORIA, YOUNGS BAY, OR

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