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Datums for 8638610, Sewells Point VA


Elevations on Station Datum

Station: 8638610, Sewells Point, VA
Status: Accepted (Jul 25 2013)
Units: Feet
T.M.: 75
Epoch: 1983-2001
Datum: STND
DatumValueDescription
MHHW7.14Mean Higher-High Water
MHW6.94Mean High Water
MTL5.72Mean Tide Level
MSL5.74Mean Sea Level
DTL5.76Mean Diurnal Tide Level
MLW4.51Mean Low Water
MLLW4.38Mean Lower-Low Water
NAVD885.99North American Vertical Datum of 1988
STND0.00Station Datum
GT2.76Great Diurnal Range
MN2.43Mean Range of Tide
DHQ0.20Mean Diurnal High Water Inequality
DLQ0.12Mean Diurnal Low Water Inequality
HWI1.55Greenwich High Water Interval (in hours)
LWI7.83Greenwich Low Water Interval (in hours)
Maximum12.40Highest Observed Water Level
Max Date & Time08/23/1933 09:18Highest Observed Water Level Date and Time
Minimum0.80Lowest Observed Water Level
Min Date & Time01/31/1966 15:00Lowest Observed Water Level Date and Time
HAT8.01Highest Astronomical Tide
HAT Date & Time10/16/1993 14:12HAT Date and Time
LAT3.66Lowest Astronomical Tide
LAT Date & Time01/21/1996 08:12LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 8638610 Sewells Point, VA

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