Data and Station Information for UNALASKA

Station Information

Station ID:	757
Latitude:	53.88
Longitude:	-166.536667
GLOSS ID:	102
Coastline code:	820
Station code:	21
Country:	UNITED STATES
Time span of data:	1955 – 2024
Completeness (%):	89
Date of last update:	23 Jan 2025

Green Arrow:	Current Station
Yellow Marker:	Neighbouring RLR Station
Red Marker:	Neighbouring Metric Station

Please note: In many cases, the station position in our database is accurate to only one minute. Thus, the tide gauge may not appear to be on the coast.

Tide Gauge Data

Plot of monthly mean sea level data at UNALASKA.

Link to larger image of monthly data plot.
Download monthly mean sea level data.

Plot of annual mean sea level data at UNALASKA.

Link to larger image of annual data plot.
Download annual mean sea level data.

Download metric sea level data. Use only with extreme caution. NOTE: If some of the data are red in the plots above, the 'flag for attention' is set. Please see the documentation below.

Additional Data Sources (guide to additional data sources)

Nearby GNSS Stations from SONEL: AV09
Nearby Real Time Stations from VLIZ: dutc, dutc2
Fast Delivery Data from UHSLC station 41: hourly and daily
Research Quality Data from UHSLC station 41: hourly and daily

Station Documentation

Link to RLR information.

Documentation added 1991-06-11

Unalaska 820/021 RLR(1970) is 9.0m below BM7

Documentation added 2011-11-24

Using information from the NOAA website the RLR diagram has been revised. Primary benchmark remains NO 7 1956 3.597m above gauge datum.

Data Authority

N.O.A.A. / N.O.S.
N/oes33, Ssmc4, Room 6531
1305 East-West Highway
Silver Spring,
MD 20910

Data

Data Notes

Extracted from Database

UNALASKA