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

Datums for 8594900, Washington DC

Elevations on Station Datum

Station: 8594900, Washington, DC
Status: Accepted (Apr 17 2003)
Units: Feet
T.M.: 75
Epoch: 1983-2001
Datum: STND
MHHW7.72Mean Higher-High Water
MHW7.49Mean High Water
MTL6.10Mean Tide Level
MSL6.10Mean Sea Level
DTL6.14Mean Diurnal Tide Level
MLW4.70Mean Low Water
MLLW4.55Mean Lower-Low Water
NAVD885.95North American Vertical Datum of 1988
STND0.00Station Datum
GT3.17Great Diurnal Range
MN2.79Mean Range of Tide
DHQ0.23Mean Diurnal High Water Inequality
DLQ0.15Mean Diurnal Low Water Inequality
HWI0.48Greenwich High Water Interval (in hours)
LWI7.61Greenwich Low Water Interval (in hours)
Maximum15.60Highest Observed Water Level
Max Date & Time10/17/1942 06:30Highest Observed Water Level Date and Time
Minimum-0.50Lowest Observed Water Level
Min Date & Time02/26/1967 04:24Lowest Observed Water Level Date and Time
HAT8.36Highest Astronomical Tide
HAT Date & Time05/05/1985 12:54HAT Date and Time
LAT3.94Lowest Astronomical Tide
LAT Date & Time01/22/1996 09:00LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.

Products available at 8594900 Washington, DC

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