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Datums for 9447130, Seattle WA


Elevations on Station Datum

Station: 9447130, Seattle, WA
Status: Accepted (Apr 17 2003)
Units: Feet
T.M.: 120
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHW19.30Mean Higher-High Water
MHW18.43Mean High Water
MTL14.60Mean Tide Level
MSL14.58Mean Sea Level
DTL13.62Mean Diurnal Tide Level
MLW10.77Mean Low Water
MLLW7.94Mean Lower-Low Water
NAVD8810.28North American Vertical Datum of 1988
STND0.00Station Datum
GT11.36Great Diurnal Range
MN7.66Mean Range of Tide
DHQ0.87Mean Diurnal High Water Inequality
DLQ2.84Mean Diurnal Low Water Inequality
HWI0.40Greenwich High Water Interval (in hours)
LWI6.64Greenwich Low Water Interval (in hours)
Maximum22.421Highest Observed Water Level
Max Date & Time01/27/1983 04:36Highest Observed Water Level Date and Time
Minimum2.9Lowest Observed Water Level
Min Date & Time01/04/1916 00:00Lowest Observed Water Level Date and Time
HAT21.197Highest Astronomical Tide
HAT Date & Time01/12/1997 15:36HAT Date and Time
LAT3.642Lowest Astronomical Tide
LAT Date & Time06/22/1986 18:36LAT 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 9447130 Seattle, WA

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