San Francisco (California, USA) Site History

History Summary

Station Name San Francisco
Country USA
Latitude 37° 48.4' N
Longitude 122° 27.9' W
GLOSS No. 158
Time Reference GMT (hours 00-23)
Contributor US Coastal Geodetic Survey (1901-1972)
National Ocean Service (NOS) (1973+)
Instrument Type standard mechanical (1901-1974)
analog-to-digital (ADR) recorder (1975-1990)
Aquatrak acoustic gauge, NOAA Next Generation Water
Level Measuring System (NGWLMS) (1991-)
Site of Gauge  
Observational Periods 1901-1996

Reference Level

All heights have been referred to the station tide staff zero which is linked to fixed benchmarks.

Tide Gauge Benchmark (TGBM) Description

US C&GS tidal benchmark survey disk stamped '180 1936' set in a concrete wall at the Fort Point Coastguard Station.

Auxiliary Benchmarks

174 1925 4290 J 1976
175 1925 4290 K 1976
176 1925 4290 L 1976
181 1945 4290 M 1982
NO 2 1948
CLARK 1948

Benchmark Relationships

Benchmark Elevation Epoch
TGBM 13.24 feet above mean lower low water 1960-1978
TGBM 10.11 feet above mean sea level 1960-1978
TGBM 8.01 feet above mean high water 1960-1978

Quality Assessment by the UH Sea Level Center

Comments

The daily and monthly means reveal no apparent reference level changes or trends and agree with the nearest stations.

Timing accuracy no better than about ±7 minutes prior to 1930.

Notable Episodic Events

Year CI(%) Missing Data Replaced Gaps or Bad Data Questionable Fluctuations
1901 99 none none none
1902 100 none none none
1903 100 none none 201-243
1904 100 none none 221-225,252-270, 277-279,299-301
1905 100 none none 249-251
1906 100 none none none
1907 100 none none none
1908 100 none none none
1909 100 none none none
1910 100 none none none
1911 100 none none none
1912 100 none none none
1913 100 none none none
1914 100 none none none
1915 100 none none none
1916 100 none (18)018-(11)019 (22)174-(05)175 (22)201-(13)202 (06)218-(05)219 (00)223-(10)223 none
1917 100 none none none
1918 100 none none 331
1919 100 none none 32-34
1920 100 none none none
1921 100 none none none
1922 100 none (12)137-(21)137 175-179
1923 100 none none none
1924 100 none (00)172-(16)172 (22)362-(11)363 none
1925 100 none (09)129-(18)129 (08)186-(05)187 none
1926 100 none (00)064-(10)064 343-349
1927 100 none (08)183-(16)183 (12)206-(23)206 none
1928 100 none none 117-122,360-361
1929 100 none none 23-26
1930 100 none (04)272-(18)272 (19)350-(06)351 320-321
1931 100 none none none
1932 100 none none none
1933 100 none none none
1934 100 none none none
1935 100 none none none
1936 100 none none none
1937 100 none 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 100 none none none
1944 100 none none 201-204
1945 100 none none none
1946 94 157-179 none 205-213
1947 100 none none 181
1948 100 none none none
1949 100 none none none
1950 100 none (22)299-(05)300 none
1951 100 none none none
1952 100 none none none
1953 100 none none none
1954 100 none none none
1955 100 none (01)252-(09)252 none
1956 100 none none none
1957 100 none none none
1958 100 none none none
1959 100 none (01)335-(18)335 none
1960 100 none (16)017-(10)018 none
1961 100 none none none
1962 100 none (20)021-(10)022 (14)310-(23)310 (07)327-(19)327 none
1963 100 none (17)152-(08)153 26-27,168
1964 100 none none none
1965 98 204-213 none none
1966 100 none none none
1967 97 313-326 (23)306-(15)307 51-82,358
1968 100 none (17)276-(06)277 (17)345-(04)346 63
1969 97 244-246,249-251 (17)005-(08)006 127-151,258-265
1970 99 65-70 (00)011-(08)011 none
1971 100 none (00)304-(23)304 364-365
1972 96 22-23,26-33,61-67 (08)001-(21)001 (04)025-(13)025 none
1973 100 none (13)071-(23)071 none
1974 100 none (21)004-(08)005 (12)013-(07)014 (09)096-(21)096 (14)262-(21)262 363
1975 100 none none none
1976 100 none none none
1977 98 18-24 (00)214-(19)214 (20)217-(04)218 (21)218-(04)219 (21)219-(05)220 (23)220-(06)221 (23)221-(06)222 (00)223-(07)223 none
1978 84 1-60 none none
1979 100 none (16)009-(00)010 101-118
1980 100 none (07)296-(14)296 none
1981 100 none none none
1982 100 none none none
1983 100 none none none
1984 100 none none none
1985 100 none none 248-249
1986 100 none none none
1987 100 none none 139-140,150-153
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 100 none none none
1994 100 none none none
1995 100 none none none
1996 100 none none none