QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 09 Sep 2020 Station : Neah Bay,WA Latitude: 48 22.1N Country : USA Longitude: 124 37.0W JASL # : 558A Time Meridian: 120W (GMT - 8 hr) GLOSS # : none Originator #:9443090 NODC #: 74128401 Contributor : National Ocean Service (NOS) National Ocean. and Atmos. Administration (NOAA) N/OES22 SSMC4, STATION 7109 1305 East West Highway Silver Spring, MD. 20910-3233 Originator : same Original Data: unconfirmed; 1993+ digital Instrmnt Type: float/well system (1934-1992); Aquatrak acoustic gauge, NOAA Next Generation Water Level Measuring System (NGWLMS) (1993-) Digitzd Intvl: unconfirmed; 1993+ six-minute NGWLMS sampling is three-minute average Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot sampling on the hour Daily : 119-point convolution filter (Bloomfield, 1976) centered on noon applied to the hourly data with respective periods of the 95, 50, and 5% amplitude points at 124.0, 60.2, and 40.2 hours Monthly: Simple average of all daily values; calculated if 7 or fewer days are missing Span of data : 01 Aug 1934 - 31 Dec 2019 Gaps > 1 mon : 16 Feb 1948 - 24 Mar 1948;16 Feb 1951 - 16 Aug 1951 01 Aug 1955 - 01 Sep 1955;12 Nov 1958 - 27 Apr 1959 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : Yes Distribution : 1934-2019 Refernce Levl: All heights have been referred to the station tide staff zero which is linked to fixed bench marks. While standard mechanical or ADR instrument was the primary gauge, leveling calibration factors were applied monthly based on tide staff comparisons. Comment : The daily and monthly means reveal no apparent reference level changes or trends. Significant eposodic events: tsunamis, 23-25 May 1960, 28-30 March 1964, and 11-12 Mar 2011. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1934 42 none none 286-287,354 1935 100 none none none 1936 100 none none none 1937 95 17-36 none none 1938 100 none none none 1939 100 none none none 1940 100 none none none 1941 100 none none none 1942 100 none none none 1943 93 126-129,140-150 none none 1944 100 none none none 1945 100 none none none 1947 95 95-114 none 32-34 1948 85 48-84,347-364 none 174 1949 95 108-118,355-364 none none 1950 100 none none none 1951 43 47-228,241-262, none 239-240 270-274 1952 94 172-183,355-366 (00)134-(07)134 none (03)347-(19)347 (03)354-(22)354 1953 99 1,177-182 none none 1954 100 none none none 1955 92 213-244 none 336 1956 100 none none none 1957 88 280-288,311-319, (10)293-(09)294 none 336-365 (01)322-(16)322 1958 84 1,29-36,316-365 (21)205-(09)206 153-154,170-185,198 (06)314-(20)314 1959 67 1-117,231-235, (02)183-(18)183 145-146,228-229,256- 240-241 (05)238-(21)238 257 (08)239-(17)239 1960 100 none none 49-50 1961 100 none none 9-10 1962 100 none none 152,158,188,244,294 1963 98 182-186,200-204 (03)188-(11)188 none (04)189-(12)189 (05)190-(12)190 (05)192-(14)192 (00)197-(07)197 (00)198-(08)198 (06)205-(16)205 (13)211-(05)212 1964 100 none none 92 1965 100 none none 228-230,343,353-354, 361 1966 96 11-17,153-160 none 23,40,328-329,362 1967 100 none (01)001-(08)001 none 1968 100 none none 179-180 1969 100 none none 70 1970 100 none none none 1971 100 none none 213-243,305 1972 100 none none none 1973 100 none (16)075-(08)076 25,47 (13)355-(23)355 1974 100 none none none 1975 100 none (08)120-(18)120 84-85,98-99,185-219 (23)325-(09)326 1976 94 47-70 (21)305-(23)305 21,134-244,358-366 1977 95 103-121 none 1-103,179-180,226- 243,335-365 1978 100 none none 1-125 1979 100 none none none 1980 100 none none 70-71 1981 100 none none 153-155,180-182 1982 92 4-15,49-68 none 229-231 1983 100 none none 307 1984 100 none none 80,184-186,246-249 1985 100 none none none 1986 100 none none none 1987 100 none none 227 1988 100 none none none 1989 100 none none none 1990 100 none none none 1991 100 none none none 1992 88 92-97,223-236,242- none none 258,301-310 1993 100 none none none 1994 100 none none none 1995 92 267-279,285-289, none none 295-307 1996 99 100-103 none none 1997 100 none none none 1998 100 none none none 1999 100 none (06)334-(14)334 none (03)336-(12)336 (02)349-(12)349 2000 96 4-5,7-8,10-15,21-23, none none 26-28,331-333, 361-363 2001 99 5-7 (04)012-(10)012 37-38 (12)013-(18)013 (09)034-(17)034 2002 100 none none none 2003 100 none none none 2004 100 none none none 2005 100 none none none 2006 100 none (04)235-(13)235 none (04)237-(14)237 2007 97 41-52 none none 2008 100 none none none 2009 100 none none none 2010 100 none none none 2011 100 none none none 2012 100 none none 190-191 2013 100 none none none 2014 100 none none none 2015 100 none none none 2016 100 none none none 2017 100 none none none 2018 100 none none none 2019 100 none none none