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

Datums for 9450460, Ketchikan AK


Elevations on Station Datum

Station: 9450460, Ketchikan, AK
Status: Accepted (Sep 26 2011)
Units: Feet
T.M.: 0
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHW21.64Mean Higher-High Water
MHW20.74Mean High Water
MTL14.25Mean Tide Level
MSL14.26Mean Sea Level
DTL13.91Mean Diurnal Tide Level
MLW7.76Mean Low Water
MLLW6.19Mean Lower-Low Water
NAVD88
STND0.00Station Datum
GT15.45Great Diurnal Range
MN12.97Mean Range of Tide
DHQ0.91Mean Diurnal High Water Inequality
DLQ1.57Mean Diurnal Low Water Inequality
HWI9.41Greenwich High Water Interval (in hours)
LWI3.10Greenwich Low Water Interval (in hours)
Maximum27.50Highest Observed Water Level
Max Date & Time12/02/1967 22:24Highest Observed Water Level Date and Time
Minimum0.93Lowest Observed Water Level
Min Date & Time12/14/2008 04:18Lowest Observed Water Level Date and Time
HAT25.91Highest Astronomical Tide
HAT Date & Time12/03/1994 21:18HAT Date and Time
LAT1.64Lowest Astronomical Tide
LAT Date & Time07/03/2000 16:42LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 9450460 Ketchikan, AK

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