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Datums for 9447130, Seattle WA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9447130, Seattle, WA
Status: Accepted (Apr 17 2003)
Units: Feet
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW11.36Mean Higher-High Water
MHW10.49Mean High Water
MTL6.66Mean Tide Level
MSL6.64Mean Sea Level
DTL5.68Mean Diurnal Tide Level
MLW2.83Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD882.34North American Vertical Datum of 1988
STND-7.94Station 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)
Max Tide22.42Highest Observed Tide
Max Tide Date & Time01/27/1983 04:36Highest Observed Tide Date & Time
Min Tide2.90Lowest Observed Tide
Min Tide Date & Time01/04/1916 00:00Lowest Observed Tide Date & Time
HAT13.26Highest Astronomical Tide
HAT Date & Time01/12/1997 15:36HAT Date and Time
LAT-4.30Lowest Astronomical Tide
LAT Date & Time06/22/1986 18:36LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 9447130 Seattle, WA

Revised: 10/15/2013
NOAA / National Ocean Service
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