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Current Datum Value: 25.51

Datums for 9440483, Barlow Point


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9440483, Barlow Point
Status: Accepted (Jan 12 2017)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW5.05Mean Higher-High Water
MHW4.54Mean High Water
MTL2.48Mean Tide Level
MSL2.27Mean Sea Level
DTL2.52Mean Diurnal Tide Level
MLW0.41Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-25.51Station Datum
GT5.05Great Diurnal Range
MN4.13Mean Range of Tide
DHQ0.51Mean Diurnal High Water Inequality
DLQ0.41Mean Diurnal Low Water Inequality
HWI10.98Greenwich High Water Interval (in hours)
LWI6.21Greenwich 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
08/01/2016 - 10/31/2016




Products available at 9440483 Barlow Point,

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