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Datums for 8557380, Lewes DE


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8557380, Lewes, DE
Status: Accepted (Sep 13 2017)
Units: Feet
Control Station:
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW4.65Mean Higher-High Water
MHW4.23Mean High Water
MTL2.20Mean Tide Level
MSL2.23Mean Sea Level
DTL2.33Mean Diurnal Tide Level
MLW0.16Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD882.63North American Vertical Datum of 1988
STND-2.78Station Datum
GT4.65Great Diurnal Range
MN4.07Mean Range of Tide
DHQ0.42Mean Diurnal High Water Inequality
DLQ0.16Mean Diurnal Low Water Inequality
HWI1.13Greenwich High Water Interval (in hours)
LWI7.15Greenwich Low Water Interval (in hours)
Max Tide9.26Highest Observed Tide
Max Tide Date & Time01/23/2016 13:24Highest Observed Tide Date & Time
Min Tide-4.21Lowest Observed Tide
Min Tide Date & Time01/10/1978 16:00Lowest Observed Tide Date & Time
HAT5.82Highest Astronomical Tide
HAT Date & Time11/04/1994 13:36HAT Date and Time
LAT-1.14Lowest Astronomical Tide
LAT Date & Time02/09/1997 08:18LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 8557380 Lewes, DE

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services