Nawiliwili (Kauai, Hawaii) Site History

History Summary

Station Name Nawiliwili, Kauai, Hawaii
Latitude 21° 57.3' N
Longitude 159° 21.4' 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 (1954-1972).
Instrument Type Standard mechanical (1954-1974)
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 1954 - 2000
Reference Level All heights have been referred to the station tide staff zero which is linked to fixed benchmarks.

Location Note

Please note that the position information has been altered in this document - see document 83916.

Tide Gauge Benchmark (TGBM) Description

Benchmark 5(1954) is the primary benchmark (PBM) stamped 'NO 5 1954' set in concrete walk leading to U.S. Coastguard Boat Station Pier, 138ft south of wharf face line of Pier 1.

Auxiliary Benchmarks

9 additonal benchmarks are levelled to the TGBM and the Tide Station on a yearly basis.

Benchmarks

Benchmark Description
TGBM 7.40ft above Tide Gauge Zero (Station Datum)
NOAA Chart Datum (MLLW) 2.18ft above Station Datum
Mean Sea Level (1960-1978) 3.03ft above Station Datum

Quality Assessment

Comments

The daily and monthly means reveal no apparent reference level changes or trends. However, the residuals showed a substantial drop on the day of the 1960 tsunami.

240 mm were added to the original data from 16Z 23 May - 16Z 24 May 1960.

The data for 1995-2000 were supplied with heights relative to MLLW. Consequently 644mm 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
1955 100 None (05)006-(12)006 None
1956 97 339-342,349-356 (07)138-(15)138 None
1957 95 164-174,176-178, 329-335 None None
1958 94 34-35,38-58 None None
1959 100 None (03)219-(10)219 None
1960 100 None None None
1961 100 None (10)004-(09)005 (13)316-(20)316 None
1962 100 None None 48,273
1963 98 25-29,115-119 None None
1964 100 None (10)006-(09)007 (10)191-(09)192
(10)241-(09)242
None
1965 100 None None None
1966 99 45-48 (10)339-(09)340 48-49
1967 100 None None None
1968 100 None (14)335-(23)335 (01)336-(09)336 None
1969 100 None None None
1970 98 346-350,357-362 (08)331-(16)331 (02)342-(23)342
(19)364-(17)365
332
1971 99 1-4 None None
1972 100 None None None
1973 99 1 None None
1974 89 63-103,111-112 (03)110-(09)110 (13)110-(22)110 180,181
1975 99 339-340 None None
1976 100 None None None
1977 100 None (10)001-(09)002 None
1978 100 None None None
1979 100 None None None
1980 93 31-32,252-275 None None
1981 100 None (19)093-(02)094 None
1982 100 None None 327-332
1983 100 None None None
1984 100 None (19)032-(01)033 None
1985 100 None None None
1986 100 None None None
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 100 None None None
1993 97 35-38,222-229 None None
1994 99 217-221 None None
1995 98 17-23 None None
1996 100 None None None
1997 100 None None None
1998 100 None None 151-169,188-248
1999 100 None None None
2000 100 None None 73-96,103-125,132-149,175-193,
197-249, 254-256,273-280,
289-296,344-347