Honolulu (Hawaii) Site History

History Summary

Station Honolulu, Hawaii
Country USA
Latitude 21° 18.4' N
Longitude 157° 52.0' W
GLOSS No 108
Time Reference GMT (hours 00-23)
Contributor National Ocean Service (NOS) (1973+)
National Ocean. and Atmos. Administration (NOAA) US Coastal Geodetic Survey (1905-1972);
Instrument Type Standard mechanical (1905-1974)
Analog-to-digital (ADR) recorder (1975-1990)
Aquatrak acoustic gauge, NOAA Next Generation Water Level Measuring System (NGWLMS) (1991-2000)
Site of Gauge  
Observational Period 1905 - 2000

Reference Level

All heights have been referred to the station tide staff zero which is linked to fixed benchmarks. NOS performed level control on historic data (prior to 1973). An obvious level jump was adjusted by +160 mm (19Z) 26 June to (23Z) 01 July, 1953.

Tide Gauge Benchmark (TGBM) Description

Benchmark 8(1913), the primary benchmark (PBM), stamped 'BM ELV 8.06FT', is set in a concrete bulkhead on the south west side of Ala Moana Boulevard across from Hawaiian Electric Company Power Plant.

Auxilary Benchmarks

11 additional benchmarks are levelled to the TGBM and the Tide Station on a yearly basis.

Benchmark Relationships

TGBM is 12.25ft above Tide Gauge Zero (Station Datum).

NOAA Chart Datum (MLLW) is 3.69ft above Station Datum.

Mean Sea Level (1960-1978) is 4.54ft above Station Datum.

Quality Assessment

Comments

The daily and monthly means reveal no apparent reference level changes or trends and agree with the nearest stations. Anomalously high values exist within the historic data which may or may not be in error:

The data for 1996-2000 were supplied with heights relative to MLLW. Consequently 1125mm was added to refer the data to tide gauge zero.

The data for 1998-2000 were supplied in non-GMT format and had to be shifted into GMT.

Notable episodic events:

Gaps in the Data Record

The following gaps occur in the data set.

Year CI (%) Missing Data Replaced Gaps or Bad Data Questionable Fluctuations
1905 99 None (05)024-(14)024,(22)353-(05)354 None
1906 100 None (04)019-(20)019,(13)349-(21)349,(05)364-(16)364 None
1907 100 None (12)144-(10)145,(00)336-(20)336 None
1908 100 None (01)002-(19)002,(04)199-(12)199,(06)350-(16)350 253-256
1909 100 None None None
1910 100 None (16)016-(03)017,(05)039-(16)039,(18)041-(03)042,(15)042-(22)042,(04)066-(17)066,(17)070-(00)071,(07)105-(15)105,(12)136-(19)136,(00)147-(11)147,(20)154-(03)155,(10)222-(17)222 183-184
1911 100 None (19)199-(05)200 107-109,116-118
1912 100 None (05)080-(15)080 None
1913 100 None (08)106-(19)106 None
1914 100 None (03)073-(10)073,(11)270-(20)270 172,303-304
1915 100 None (18)040-(01)041,(20)309-(17)310,(04)354-(21)354 None
1916 100 None (02)153-(09)153,(10)197-(18)197,(08)256-(15)256 None
1917 100 None (01)021-(21)021,(01)045-(19)045,(09)049-(17)049,(00)079-(19)079,(02)122-(10)122,(22)164-(15)165,(23)217-(13)218,(11)314-(18)314,(13)332-(20)332,(03)364-(22)364 156-157
1918 100 None (10)001-(22)001,(02)038-(16)038 None
1919 100 None (01)121-(00)122,(00)137-(14)137 13-14
1920 100 None (10)303-(19)303,(22)309-(05)310,(16)362-(23)362,(10)303-(19)303,(22)309-(05)310,(16)362-(23)362 None
1921 75 91-182 None None
1922 100 None None None
1923 100 None (21)178-(07)179,(20)179-(04)180,(21)180-(09)181 None
1924 100 None (16)056-(23)056,(00)096-(07)096,(12)110-(19)110,(00)167-(07)167 None
1925 100 None None None
1926 100 None (12)013-(21)013,(12)014-(19)014,(12)015-(21)015,(13)016-(23)016,(18)236-(01)237,(11)318-(19)318 None
1927 100 None None None
1928 100 None (20)170-(03)171,(01)305-(23)305 None
1929 99 314-317 None None
1930 100 None (15)284-(22)284 99
1931 100 None (04)135-(12)135,(09)147-(18)147,(22)308-(07)309,(13)359-(21)359 None
1932 100 None (12)021-(21)021,(02)076-(09)076,(22)083-(10)084 None
1933 100 None (10)321-(21)321 None
1934 100 None None None
1935 100 None None None
1936 100 None (21)297-(04)298 None
1937 100 None None None
1938 100 None (00)315-(09)315 None
1939 100 None (15)347-(22)347 None
1940 84 308-366 (02)186-(10)186 None
1941 99 1,297-298 (10)120-(23)120,(10)170-(09)171 None
1942 86 202-253,365 None None
1943 100 None (14)092-(02)093,(07)130-(14)130,(01)170-(10)170,(06)189-(14)189,(12)221-(21)221 None
1944 100 None (18)002-(02)003 None
1945 100 None None None
1946 100 None None None
1947 100 None None None
1948 100 None None None
1949 100 None (19)006-(02)007 None
1950 97 283-294 None None
1951 100 None (09)348-(22)348 None
1952 100 None (08)064-(15)064 None
1953 97 108-121 None None
1954 100 None None None
1955 100 None (07)104-(20)104 None
1956 100 None None None
1957 100 None (21)289-(08)290 None
1958 100 None (06)014-(13)014,(04)070-(15)070,(15)079-(08)080 None
1959 100 None (21)100-(16)101 None
1960 100 None None None
1961 100 None None None
1962 100 None (15)228-(14)229 None
1963 100 None (01)274-(15)274,(12)286-(23)286,(05)346-(18)346 None
1964 100 None None None
1965 100 None (07)035-(14)035,(05)362-(14)362 None
1966 100 None None None
1967 100 None None None
1968 100 None None None
1969 100 None (14)278-(23)278 None
1970 100 None (08)012-(16)012,(22)013-(22)014,(00)108-(08)108 None
1971 100 None None None
1972 99 336-341 (10)013-(09)014 None
1973 75 62-64,95-96,176-178,221-278,278-283,287-293,293-295,320-330 (04)103-(23)103,(05)169-(22)169,(16)295-(21)295 None
1974 89 71-80,83-85 (12)080-(23)080,(14)081-(21)081 None
1975 99 None None
1976 90 200-216,293-307,324-328 None None
1977 84 3-33,182-184,193-213,296-298 None None
1978 99 233-235 (19)017-(02)018 3
1979 99 47-50 None None
1980 100 None None None
1981 100 None None None
1982 98 298-305 None 311
1983 100 None None 292
1984 100 None None 208
1985 100 None None None
1986 100 None None 28-29
1987 100 None None None
1988 100 None None None
1989 100 None None None
1990 100 None None None
1991 100 None None None
1992 81 45-115 None None
1993 100 None None None
1994 100 None None None
1995 100 None None None
1996 100 None None None
1997 100 None None None
1998 100 None None 229-240,252-267,285-289
1999 100 None None None
2000 100 None None 80-89,97-102,111-118,124-134,138-145,154-162,220-222,260-277