GLOSS Station Handbook

Station information sheet

GLOSS number106
Station name

Midway Is, Hawaiian Is.

Time zone165W, GMT - 11hrs
Latitude (+ve N)28.21666
Longitude (+ve E)-177.36666
Observation period(s)1947-, being upgraded
Responsible countryU.S.A.
Authority responsible
for tide gauge
NOAA, National Ocean Service, 1305 East-West Highway, Silver Spring, MD 20910-3281, USA
GLOSS contactUSA
Committed to GLOSSYes
Location mapView location map for GLOSS station Midway Is, Hawaiian Is.
Digital dataYes
Additional parametersSea surface temperature, density, barometric pressure
Data acquisition rateDigital gauge: 6 minute interval (after 1975) Analog gauge: hourly heights (before 1975)
Fast delivery data at UHSLCDownload h050.dat from UHSLC   Format documentation for UHSLC data
High frequency data at BODCDownload from BODC   View Midway Is, Hawaiian Is. site history  
High frequency data at UHSLCDownload from UHSLC   Download documentation qa050a.dmt from UHSLC   Format documentation for UHSLC data
Data held at national organisationYes
Real-time data availableYes
Real-time data transmitted
to GLOSS Fast Centre
Real-time data plots from UHSLC
Additional parameters (real-time)Sea surface temperature, density, barometric pressure
Tide gauge benchmarksBenchmark 21(1959) is the primary benchmark (PBM) stamped '21 1959' set in a concrete manhole structure at the north east corner of Inner Harbor Boat Basin.
Benchmark relationshipsTGBM is 10.64ft above Tide Gauge Zero (Station Datum) NOAA Chart Datum (MLLW) is 2.62ft above Station Datum Mean Sea Level (1960-1978) is 3.27ft above Station Datum
Auxiliary benchmarks9 additonal benchmarks are levelled to the TGBM and the Tide Station on a yearly basis (BM 2, BM 3, BM 18, BM 25, BM A, BM 23, BM 22, BM 20, BM 19).
Data at PSMSL 
Annual MSL (RLR) dataDownload annual MSL (RLR) data for Midway Is, Hawaiian Is.
Annual MSL (RLR) plotView annual MSL (RLR) plot for Midway Is, Hawaiian Is.
PSMSL code523
Other relevant codesUHSLC 050
Additional information 
Last updated1993-12-05