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Current Datum Value: 52.58

Datums for 9440581, Cape Disappointment


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9440581, Cape Disappointment
Status: Accepted (Mar 23 2016)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW7.75Mean Higher-High Water
MHW7.08Mean High Water
MTL4.14Mean Tide Level
MSL4.04Mean Sea Level
DTL3.87Mean Diurnal Tide Level
MLW1.20Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-52.58Station Datum
GT7.76Great Diurnal Range
MN5.87Mean Range of Tide
DHQ0.67Mean Diurnal High Water Inequality
DLQ1.21Mean Diurnal Low Water Inequality
HWI8.65Greenwich High Water Interval (in hours)
LWI2.16Greenwich 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
HAT10.09Highest Astronomical Tide
HAT Date & Time12/31/1986 20:06HAT Date and Time
LAT-2.93Lowest Astronomical Tide
LAT Date & Time06/22/1986 14:42LAT Date and Time
Tidal Datum Analysis Periods
08/01/2015 - 08/31/2015




Products available at 9440581 Cape Disappointment,

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