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Datums for 9451054, Port Alexander AK


Elevations on Station Datum

Station: 9451054, Port Alexander, AK
Status: Accepted (Dec 7 2012)
Units: Feet
T.M.: 135
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHW14.68Mean Higher-High Water
MHW13.82Mean High Water
MTL9.51Mean Tide Level
MSL9.48Mean Sea Level
DTL9.22Mean Diurnal Tide Level
MLW5.20Mean Low Water
MLLW3.75Mean Lower-Low Water
NAVD88
STND0.00Station Datum
GT10.92Great Diurnal Range
MN8.63Mean Range of Tide
DHQ0.85Mean Diurnal High Water Inequality
DLQ1.44Mean Diurnal Low Water Inequality
HWI9.60Greenwich High Water Interval (in hours)
LWI3.34Greenwich Low Water Interval (in hours)
Maximum18.69Highest Observed Water Level
Max Date & Time12/23/2007 20:30Highest Observed Water Level Date and Time
Minimum-0.53Lowest Observed Water Level
Min Date & Time12/14/2008 04:30Lowest Observed Water Level Date and Time
HAT17.77Highest Astronomical Tide
HAT Date & Time12/23/1999 21:42HAT Date and Time
LAT0.31Lowest Astronomical Tide
LAT Date & Time05/25/1990 16:18LAT Date and Time
Tidal Datum Analysis Periods
09/01/2007 - 08/31/2008
06/01/2009 - 05/31/2012




Products available at 9451054 Port Alexander, AK

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