St. John's (Canada) Site History

Station Summary

Station St. John's
Country Canada
GLOSS No 223
Latitude 47 34.0N
Longitude 052 42.0W
Time Meridian 053W (GMT -3.5 hr)
Contributor Marine Environmental Data Service,
Dept. of Fisheries and Oceans,
S12082-200 Kent St.Ottawa,
Ontario,
CANADA K1A-0E6
Originator Dept of Fisheries,
Atlantic Tidal Section,
BIO, P.O. Box 1006,
Dartmouth, Nova Scotia,
CANADA B2Y-4A2
Instrument Type OTT float/well gauge until 1987 when bubbler gauge was installed which utilizes the tidal acquisition telemetry system (TATS)
New stilling well and sensor system installed in early fall of 2009. Insulated, heated 3 sensors: laser, bubbler and pressure
Original Data Prior to 2009: analogue (OTT) digital (TATS)
After 2009: 1 minute averaged data, downloaded every 10 min
Observational periods 01 November 1961 at 0330 - 01 January 2002 at 0230
01 January 2007 at 0330 - 01 January 2011 at 0230
Tide Gauge benchmark
(TGBM) description
  • All heights have been referred to the station tide staff zero which is linked to fixed benchmarks.

  • The primary benchmark is BM 76F27, a Geodetic Survey of Canada (GSC) tablet which is located horizontally in the SE foundation, 1.1m from south corner, 0.15m below brick siding of the St. John's Ministry of Transport depot building.

  • Elevation 4.412m above chart datum.

Quality Assessment

The hourly residuals show significant fluctuations within the tidal frequency band. It is not sure whether this is due to the inability of the tidal analysis to resolve the complex nature of the tides or errors in the timing of the instrument. Only extreme fluctuations are listed below.

Year Completeness Index (%) Questionable Fluctuations (In day Nos) and
Missing Data (Gaps >6 hours up to 2007, all gaps reported after)
1961 100 362-365
1962 100 001,295,352,355
1963 100 354,364
1964 100 None
1965 100 020,032
1966 100 004,125,132
1967 100 035,039,053,067,094
1968 100 053,149-153,264-271,344
1969 100 006,300
1970 100 008,041-042
1971 100 001,020-021,242-244
1972 100 046-048,052-056,058-059
1973 100 086-088
1974 100 012-014,015,020-021,055,202-205,242-252,257-264,290,301-306,319
1975 99.8 077,353
Gap from 1975/10/03 at 1630 to 1975/10/03 at 2330
Gap from 1975/11/01 at 1130 to 1975/11/01 at 2330
1976 98.7 002-004,006-009,024-029,033-035,294,340,348-350
Gap from 1976/02/08 at 1030 to 1976/02/09 at 1030
Gap from 1976/03/01 at 0330 to 1976/03/01 at 1030
Gap from 1976/03/02 at 1530 to 1976/03/04 at 1030
Gap from 1976/03/06 at 0330 to 1976/03/08 at 1030
Gap from 1976/05/09 at 0130 to 1976/05/10 at 0930
1977 91.7 006,020,204,312
Gap from 1977/01/21 at 0330 to 1977/02/02 at 1830
Gap from 1977/04/26 at 0030 to 1977/04/28 at 1130
Gap from 1977/08/01 at 0330 to 1977/08/19 at 0230
1978 90.9 248
Gap from 1978/01/19 at 2230 to 1978/01/20 at 1030
Gap from 1978/01/23 at 1930 to 1978/01/30 at 1130
Gap from 1978/02/08 at 0930 to 1978/02/09 at 1830
Gap from 1978/02/13 at 2330 to 1978/02/14 at 1330
Gap from 1978/02/26 at 1130 to 1978/02/26 at 1830
Gap from 1978/03/02 at 1530 to 1978/03/07 at 1330
Gap from 1978/07/02 at 1830 to 1978/07/09 at 0230
Gap from 1978/07/15 at 0330 to 1978/07/21 at 1530
Gap from 1978/12/05 at 1230 to 1978/12/07 at 1830
Gap from 1978/12/16 at 2330 to 1978/12/20 at 1130
1979 96.1 049,069-072,120-121,205-214,350-352,354-357
Gap from 1979/03/01 at 1230 to 1979/03/05 at 1130
Gap from 1979/06/01 at 1130 to 1979/06/04 at 1030
Gap from 1979/06/11 at 2330 to 1979/06/18 at 1030
Gap from 1979/08/04 at 0330 to 1979/08/06 at 1230
Gap from 1979/09/04 at 1130 to 1979/09/05 at 1230
Gap from 1979/10/03 at 1130 to 1979/10/05 at 1630
1980 86.4 012-013,014-019,042,058,178-188,190-201,331-334,361-365
Gap from 1980/01/07 at 0830 to 1980/01/07 at 1830
Gap from 1980/01/23 at 0730 to 1980/01/23 at 1630
Gap from 1980/03/08 at 1830 to 1980/03/10 at 1730
Gap from 1980/05/19 at 1530 to 1980/05/20 at 1030
Gap from 1980/07/06 at 0330 to 1980/07/08 at 1030
Gap from 1980/07/27 at 0630 to 1980/08/01 at 0230
Gap from 1980/08/01 at 1330 to 1980/08/07 at 1030
Gap from 1980/08/24 at 0430 to 1980/09/01 at 0230
Gap from 1980/09/02 at 1730 to 1980/09/13 at 0330
Gap from 1980/09/24 at 0630 to 1980/09/28 at 1830
Gap from 1980/10/05 at 0330 to 1980/10/10 at 1430
Gap from 1980/10/23 at 0330 to 1980/10/28 at 0030
1981 98.6 002,043-047
Gap from 1981/01/21 at 1830 to 1981/01/22 at 1630
Gap from 1981/03/29 at 1030 to 1981/03/30 at 1730
Gap from 1981/04/07 at 1530 to 1981/04/09 at 1230
Gap from 1981/05/04 at 0830 to 1981/05/04 at 1830
Gap from 1981/06/01 at 0330 to 1981/06/01 at 1130
1982 100 045,057-061,100-107,271-274,345
1983 99.9 005-009,345-349
Gap from 1983/08/01 at 0330 to 1983/08/01 at 1330
1984 51.8 Gap from 1984/03/01 at 0330 to 1984/03/01 at 1430
Gap from 1984/04/12 at 2030 to 1984/04/17 at 0230
Gap from 1984/05/01 at 0330 to 1984/10/19 at 1830
1985 100 None
1986 100 None
1987 77.3 157-163,339-344
Gap from 1987/01/22 at 1530 to 1987/03/02 at 1930
Gap from 1987/04/05 at 1830 to 1987/04/24 at 1830
Gap from 1987/05/29 at 0330 to 1987/05/29 at 1830
Gap from 1987/08/20 at 0530 to 1987/08/27 at 2030
Gap from 1987/10/10 at 1630 to 1987/10/11 at 1730
Gap from 1987/10/31 at 1530 to 1987/11/02 at 1930
Gap from 1987/11/13 at 1830 to 1987/11/16 at 1030
Gap from 1987/11/20 at 2230 to 1987/11/24 at 1430
Gap from 1987/12/12 at 1930 to 1987/12/13 at 1330
Gap from 1987/12/16 at 2130 to 1987/12/17 at 1830
Gap from 1987/12/21 at 0430 to 1987/12/21 at 1830
Gap from 1987/12/26 at 0830 to 1987/12/26 at 1630
Gap from 1987/12/27 at 1330 to 1987/12/29 at 0130
Gap from 1987/12/30 at 0330 to 1987/12/31 at 1530
1988 97.2 267
Gap from 1988/01/23 at 1630 to 1988/01/24 at 1730
Gap from 1988/01/27 at 1530 to 1988/01/29 at 1330
Gap from 1988/04/02 at 1430 to 1988/04/06 at 1630
Gap from 1988/05/01 at 2030 to 1988/05/04 at 1830
1989 89.1 003-006,045-046,218
Gap from 1989/01/06 at 0330 to 1989/01/08 at 1430
Gap from 1989/01/21 at 0330 to 1989/02/02 at 1530
Gap from 1989/06/02 at 0230 to 1989/06/10 at 1230
Gap from 1989/06/17 at 1530 to 1989/06/24 at 1530
Gap from 1989/06/27 at 1830 to 1989/07/08 at 1530
1990 100 None
1991 100 021
1992 100 None
1993 100 325
1994 100 None
1995 99.9 234
Gap from 1995/08/14 at 1530 to 1995/08/14 at 2230
1996 97.8 Gap from 1996/11/04 at 1530 to 1996/11/12 at 1630
1997 98.6 013,020,138
Gap from 1997/06/16 at 1230 to 1997/06/21 at 1630
1998 100 None
1999 98.9 206-243,268-288,292,296-297,337-361
Gap from 1999/05/12 at 1530 to 1999/05/16 at 1130
2000 97.5 001-003,261-262
Gap from 2000/03/01 at 0330 to 2000/03/04 at 1230
Gap from 2000/04/26 at 0830 to 2000/04/29 at 0130
Gap from 2000/05/17 at 0830 to 2000/05/19 at 1430
Gap from 2000/05/22 at 0830 to 2000/05/23 at 0930
2001 98.5 020-022
Gap from 2001/04/08 at 0730 to 2001/04/13 at 1630
2007 72 Gap at 2007/01/25 0930
Gap from 2007/04/28 at 1330 to 2007/05/08 at 1530
Gap at 2007/05/11 0530
Gap at 2007/05/11 0730
Gap at 2007/05/11 1130
Gap from 2007/05/11 at 1330 to 2007/05/11 at 1430
Gap at 2007/05/11 1730
Gap at 2007/05/11 2230
Gap at 2007/08/17 1230
Gap at 2007/08/17 1630
Gap from 2007/08/27 at 0530 to 2007/11/15 at 0830
Gap from 2007/11/18 at 0930 to 2007/11/19 at 1130
Gap from 2007/11/30 at 1230 to 2007/12/02 at 0830
Gap at 2007/12/04 1630
2008 96 Gap from 2008/04/17 at 0030 to 2008/04/17 at 0130
Gap from 2008/04/17 at 0530 to 2008/04/17 at 0630
Gap from 2008/06/17 at 1830 to 2008/06/19 at 1230
Gap at 2008/06/24 1930
Gap at 2008/07/01 0330
Gap at 2008/10/09 2230
Gap at 2008/10/10 1630
Gap from 2008/10/14 at 1930 to 2008/10/17 at 0130
Gap from 2008/10/17 at 1230 to 2008/10/17 at 1630
Gap at 2008/10/24 0930
Gap at 2008/11/13 1630
Gap at 2008/12/13 0930
2009 92 Gap at 2009/01/10 0930
Gap at 2009/01/19 0530
Gap from 2009/01/19 at 1330 to 2009/01/19 at 1430
Gap at 2009/01/19 1630
Gap at 2009/01/19 1830
Gap at 2009/01/28 0930
Gap from 2009/01/29 at 1430 to 2009/01/30 at 0030
Gap from 2009/01/30 at 0230 to 2009/01/30 at 0430
Gap from 2009/01/30 at 1030 to 2009/01/30 at 1230
Gap at 2009/02/12 0730
Gap at 2009/02/21 1430
Gap at 2009/03/22 1230
Gap at 2009/04/06 0930
Gap at 2009/04/28 0530
Gap at 2009/05/05 0030
Gap at 2009/05/18 1330
Gap at 2009/05/21 0230
Gap at 2009/05/22 0430
Gap from 2009/05/23 at 0530 to 2009/05/23 at 0630
Gap at 2009/06/08 0330
Gap from 2009/06/12 at 1630 to 2009/06/12 at 1730
Gap at 2009/06/12 2030
Gap from 2009/06/13 at 0930 to 2009/06/13 at 1130
Gap at 2009/06/15 0330
Gap at 2009/06/15 1130
Gap at 2009/06/15 1330
Gap from 2009/06/15 at 1830 to 2009/06/15 at 1930
Gap at 2009/07/04 0830
Gap at 2009/07/06 1630
Gap from 2009/07/10 at 1730 to 2009/07/12 at 1330
Gap at 2009/07/17 1930
Gap at 2009/07/26 2130
Gap at 2009/09/05 0730
Gap at 2009/09/05 1130
Gap at 2009/09/05 1330
Gap from 2009/09/05 at 1530 to 2009/09/05 at 1830
Gap from 2009/09/05 at 2030 to 2009/09/05 at 2230
Gap from 2009/09/06 at 0230 to 2009/09/06 at 0330
Gap from 2009/10/18 at 1330 to 2009/10/19 at 1230
Gap at 2009/10/19 1630
Gap at 2009/10/20 1230
Gap at 2009/11/29 2230
2010 98 Gap at 2010/01/04 1930
Gap at 2010/03/13 0930
Gap from 2010/06/18 at 0030 to 2010/06/18 at 0130
Gap from 2010/06/20 at 0030 to 2010/06/20 at 0130
Gap from 2010/07/19 at 1930 to 2010/07/20 at 1530
Gap from 2010/11/16 at 1530 to 2010/11/17 at 2030
Gap from 2010/12/31 at 0930 to 2010/12/31 at 1030