Datums for 9450251, Entrance to Windy Cove AK

Data Quality Data from this station was collected using methodology that does not meet CO-OPS highest level of accuracy (no more than 10 cm, 95% Confidence Interval (CI) referenced to a tidal datum). Recognizing that lower quality data can be used for certain applications CO-OPS is making this data available to its users with restraint. The average six-minute water level observations derived from this system have an accuracy ranging from 10.0 - 30.0 cm, 95% CI on datum. Users are cautioned to consider the accuracy of these data before using them for critical navigational or coastal engineering purposes.
NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9450251, Entrance to Windy Cove, AK
Status: Accepted (Aug 15 2016)
Units: Feet
Control Station: 9450460 Ketchikan, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW13.03Mean Higher-High Water
MHW12.15Mean High Water
MTL6.85Mean Tide Level
MSL6.85Mean Sea Level
DTL6.52Mean Diurnal Tide Level
MLW1.54Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND2.09Station Datum
GT13.03Great Diurnal Range
MN10.62Mean Range of Tide
DHQ0.88Mean Diurnal High Water Inequality
DLQ1.53Mean Diurnal Low Water Inequality
HWI9.50Greenwich High Water Interval (in hours)
LWI3.22Greenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HAT16.56Highest Astronomical Tide
HAT Date & Time11/26/2034 21:24HAT Date and Time
LAT-3.83Lowest Astronomical Tide
LAT Date & Time05/27/2021 16:12LAT Date and Time
Tidal Datum Analysis Periods
05/17/2016 - 06/15/2016


Products available at 9450251 Entrance to Windy Cove, AK
  • Meteorological/Other
  • Meteorological Observations
  • Water Temp/Conductivity
  • PORTS®
  • This station is not a member of PORTS®