Datums for 9443090, Neah Bay WA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9443090, Neah Bay, WA
Status: Superseded (Apr 17 2003) (Accepted Oct 3 1997)
Units: Feet
Control Station:
T.M.: 0
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW7.96Mean Higher-High Water
MHW7.11Mean High Water
MTL4.35Mean Tide Level
MSL4.32Mean Sea Level
DTL3.98Mean Diurnal Tide Level
MLW1.60Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-2.13Station Datum
GT7.95Great Diurnal Range
MN5.51Mean Range of Tide
DHQ0.84Mean Diurnal High Water Inequality
DLQ1.60Mean Diurnal Low Water Inequality
HWI8.62Greenwich High Water Interval (in hours)
LWI2.34Greenwich Low Water Interval (in hours)
Max Tide12.17Highest Observed Tide
Max Tide Date & Time11/30/1951 20:36Highest Observed Tide Date & Time
Min Tide-4.07Lowest Observed Tide
Min Tide Date & Time11/26/2007 03:42Lowest Observed Tide Date & Time
HAT10.58Highest Astronomical Tide
HAT Date & Time12/05/2025 19:54HAT Date and Time
LAT-3.16Lowest Astronomical Tide
LAT Date & Time07/03/2004 15:36LAT Date and Time
Tidal Datum Analysis Periods
01/01/1960 - 12/31/1975
01/01/1977 - 12/31/1977




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