NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

Datums for 9439040, Astoria OR


Elevations on Station Datum

Station: 9439040, Astoria, OR
Status: Accepted (Apr 17 2003)
Units: Feet
T.M.: 120
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHW10.84Mean Higher-High Water
MHW10.17Mean High Water
MTL6.78Mean Tide Level
MSL6.74Mean Sea Level
DTL6.54Mean Diurnal Tide Level
MLW3.40Mean Low Water
MLLW2.23Mean Lower-Low Water
NAVD882.02North American Vertical Datum of 1988
STND0.00Station Datum
GT8.61Great Diurnal Range
MN6.76Mean Range of Tide
DHQ0.68Mean Diurnal High Water Inequality
DLQ1.16Mean Diurnal Low Water Inequality
HWI9.16Greenwich High Water Interval (in hours)
LWI2.97Greenwich Low Water Interval (in hours)
Maximum14.60Highest Observed Water Level
Max Date & Time01/27/1983 11:24Highest Observed Water Level Date and Time
Minimum-1.62Lowest Observed Water Level
Min Date & Time01/28/1979 20:18Lowest Observed Water Level Date and Time
HAT12.80Highest Astronomical Tide
HAT Date & Time12/11/1985 20:00HAT Date and Time
LAT0.23Lowest Astronomical Tide
LAT Date & Time06/22/1986 15:42LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 9439040 Astoria, OR

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services