GLOSS Station Handbook

GLOSS Station Handbook – Midway Is, Hawaiian Is.

The GLOSS Station Handbook is currently being re-designed and upgraded.

Until a new version is available, the tide gauge station list below from the last version of the Handbook provides links to further details about each tide gauge in the GLOSS Core Network. Click the GLOSS number buttons to view the information. Click column headings to sort the table.


Station information

Gloss number106
Station nameMidway Is, Hawaiian Is.
Time zone165W, GMT - 11hrs
Latitude (+ve N)28.21666
Longitude (+ve E)-177.36666
Observation periods1947-, being upgraded
Responsible countryU.S.A.
Authority responsible for tide gaugeNOAA, National Ocean Service, 1305 East-West Highway, Silver Spring, MD 20910-3281, USA
GLOSS contactUSA
Committed to GLOSSYes
Location map
Digital dataYes
Aditional 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 UHSLCData 050 File format
High frequency data at BODCData 106 Document 57393
High frequency data at UHSLCData 050a Document 050a File format
Data held at national organisationYes
Real-time data availableYes
Real-time data transmitted to GLOSS Fast Centre
Additional parameters (real-time)None
Tide gauge benchmarkBenchmark 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) dataRLR 523
Annual MSL (RLR) plot
PSMSL code523
Other relevant codesUHSLC 050
Additional information
Last updated5 December 1993