GLOSS Station Handbook

GLOSS Station Handbook – Seward, AK

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 number150
Station nameSeward, AK
Time zone135W, GMT - 9hrs
Latitude (+ve N)60.11666
Longitude (+ve E)-149.43333
Observation periods1923-, being upgraded 2007
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
Data acquisition rate6 minute intervals
Fast delivery data at UHSLCData 560 File format
High frequency data at UHSLCData 560a Data 560b Data 560c Document 560a Document 560b Document 560c 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 benchmarkUS C&GS tidal benchmark survey disk stamped 'NO 22 1966' set in a concrete curb supporting a guard rail near the Alaska Railroad Pier.
Benchmark relationshipsTGBM = 24.78 feet above mean lower low water (1960-1978 epoch)
TGBM = 19.24 feet above mean sea level (1960-1978 epoch)
TGBM = 15.11 feet above mean high water (1960-1978 epoch)
Auxiliary benchmarksNO 19 1966 5090 C 1978
NO 21 1966 5090 D 1982
NO 24 1973 5090 E 1982
TIDAL BM 26 1975 5090 F 1982
5090 A 1978 5090 B 1978
Site Inspection 1993 states 'levels agree with history'
Data at PSMSL
Annual MSL (RLR) dataRLR 266
Annual MSL (RLR) plot
PSMSL code266
Other relevant codesUHSLC 560
Additional information
Last updated5 December 1993