Kahului (Maui, Hawaii) Site History

History Summary

Station Name Kahului, Maui, Hawaii
Latitude 20° 54.0' N
Longitude 156° 28.0' W
Country USA
GLOSS No.  
Time Reference GMT (hours 00-23)
Contributor National Ocean Service (NOS) (1973+)
National Ocean. and Atmos. Administration (NOAA)
US Coastal Geodetic Survey (1950-1972)
Instrument Type Standard mechanical (1950-1974)
Analog-to-digital (ADR) recorder (1975-1991)
Aquatrak acoustic gauge, NOAA Next Generation Water Level Measuring System (NGWLMS) (1992-2000)
Site of Gauge  
Observational Period 1950 - 2000
Reference Level All heights have been referred to the station tide staff zero which is linked to fixed benchmarks.

Tide Gauge Benchmark (TGBM) Description

Benchmark 2(1929) is the primary benchmark (PBM) stamped '2 1929' set in the surface of the deck of Pier 2, adjacent to the northeast wall of the transit warehouse located at the shore end of the pier.

Auxiliary Benchmarks

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

Benchmarks

Benchmark Description
TGBM 11.34ft above Tide Gauge Zero (Station Datum)
NOAA Chart Datum (MLLW) is 2.23ft above Station Datum
Mean Sea Level (1960-1978) is 3.39ft above Station Datum

Quality Assessment

Comments

A reference level correction was applied to the original data by adding +15.2 cm between 03Z 14 August - 15Z 01 September 1983. Otherwise the daily and monthly means reveal no apparent reference level changes or trends.

The residuals are very noisy during some of the winter months associated with meteorological events.

The data for 1996-2000 were supplied with heights relative to MLLW. Consequently 683mm 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:

Year CI(%) Missing Data Replaced Gaps or Bad Data Questionable Fluctuations
    342-347 (17)347-(00)348  
1951 100 None None None
1952 100 None None None
1953 100 None (21)145-(04)146 None
1954 100 None None None
1955 100 None (06)018-(21)018 (04)049-(19)049 None
1956 100 None None None
1957 100 None None None
1958 100 None None None
1959 100 None None None
1960 39 144-366 (22)053-(09)054 None
1961 99 1 None None
1962 100 None (14)063-(23)063 (20)098-(04)099 None
1963 6 1-343 None None
1964 100 None (14)217-(00)218 None
1965 87 33-82 None None
1966 100 None (12)025-(19)025 (20)214-(11)215 None
1967 100 None None None
1968 100 None None 137
1969 100 None (11)203-(09)204 None
1970 100 None (23)054-(07)055 (17)172-(03)173 216-217
1971 99 16-18 (08)020-(16)020 None
1972 100 None None None
1973 99 1 None None
1974 100 None None 30-31,305
1975 75 305-365 None 33-34
1976 8 1-306,336-366 None 306,317-318
1977 79 1-78 (21)364-(06)365 (10)365-(21)365 Residuals very spiky throughout.
1978 93 339-365 (01)001-(21)001 (03)002-(17)002 7-9,11-12,21,34, 49-50
1979 50 1-152,186-192,193-197,282-298 None 246-247
1980 87 122-152,270-288 (09)033-(00)034 (23)105-(19)106
(18)216-(16)217
None
1981 96 164-177 None None
1982 100 None None 195-204
1983 99 142-143,193-194 None 147-148,184,293-306
1984 100 None None None
1985 99 60-63 (10)309-(21)309(10)335-(16)335 26-32,306-308,332- 334,356-357
1986 99 19-21 (10)023-(16)023 (06)027-(15)027 229-237
1987 100 365-366 None None
1988 100 None None None
1989 67 1-4 None None
1990 100 None None None
1991 100 None None None
1992 100 None 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 99 357-362 (01)357 None
1999 100 None (19)001,(22)001 (06)002,(17)338 9-10,58,69,81,95, 338
2000 100 None None Residuals slightly noisy throughout.