Flood Risk and Vulnerability Analysis Project - Atlantic Climate ...

Development of Projected Intensity-Duration-Frequency Curves
for Corner Brook and Goulds/Petty Harbour, Newfoundland May 16, 2012
Table 2-7 - Historical Annual Maximum Precipitation Events St. John’s A Station, 8403506, mm
Year 5 min 10 min 15 min 30 min 1 h 2 h 6 h 12 h 24 h
1949 8.9 8.9 10.2 17.5 28.2 52.6 61.7 62 63.5
1961 3 4.3 5.3 6.9 8.6 13.5 25.7 35.6 38.6
1962 2.8 4.6 4.6 8.1 13 20.6 33.8 54.9 59.7
1963 10.2 11.2 11.7 13.7 18.5 23.6 40.9 52.3 57.9
1964 4.3 6.9 7.9 11.2 19.3 28.2 54.9 72.6 77.5
1965 5.3 7.4 9.9 13 17.8 19.6 32.3 51.8 59.7
1966 8.4 13.2 17 25.4 29.7 43.7 48.5 64.5 85.3
1967 2.3 3.8 5.3 9.9 10.9 16.3 29.5 44.4 58.4
1968 6.3 12.7 13.7 14.7 17.5 22.4 41.9 55.1 61.7
1969 5.6 7.1 8.4 8.6 11.7 19 30.7 34.5 48.3
1970 5.6 7.1 10.7 15.2 16.3 19.6 42.4 62.5 87.4
1971 6.3 10.4 14.5 16 19 22.1 34.3 41.1 77.7
1972 4.8 5.3 6.6 10.9 15 20.6 47.8 72.6 89.2
1973 5.3 6.9 7.9 10.4 16.5 30 49.5 65.8 67.1
1974 3.6 5.6 6.3 9.9 16.3 22.4 42.4 53.3 72.9
1975 8.1 10.4 12.2 17.8 19 19.6 46.5 71.9 82.3
1976 3.6 4.8 6.1 8.4 12.7 19 33.8 42.2 53.6
1977 3.8 5.6 7.6 11.7 17.5 23.4 38.6 40.4 41.4
1978 4 5.9 7.4 7.6 12.9 13.1 27.1 37.6 43
1979 3.2 4.2 5.9 10.2 16.2 18.1 29.3 41.9 49.2
1980 3.2 6.1 7.4 12.2 17.4 23.9 33.6 41.6 69.8
1981 N/A N/A N/A N/A 15 22.4 46.7 72.5 82.6
1982 5.1 9 12.9 17.1 24.5 35.9 80.3 82.4 84
1983 1.6 3.2 4.8 9.6 19.2 26.5 47.3 52.8 54.7
1984 5 9.9 13 21.5 27.1 36.6 61 74 75.3
1985 5.2 7.1 9.8 11.3 14.1 18.5 36 54.9 82.9
1986 3.1 4.8 7.2 14.3 23.3 27.9 40.2 58.9 70.6
1987 5.1 7.3 8.6 16.2 23.5 24.2 30.6 36.6 46.8
1988 6.6 10.6 13.2 17.4 23.4 25.9 44.8 45.8 49
1989 2.9 4.5 6.2 8 10.9 19.7 43.4 51.6 51.6
1990 3.7 5.9 6.5 12.6 19.2 28.5 48.1 68.7 85.2
1991 7.8 11.4 15.9 23.3 28.8 29.5 51.2 52.2 59.7
1993 4.4 7 7.6 11.5 20 31.3 47.6 49.4 55.3
1994 6.2 9.1 10.3 12.6 12.8 14.9 N/A N/A 67.5
1995 5.2 9.8 14.5 16.6 27.6 46.7 55.9 58.8 61.6
1996 4.8 6.2 7.4 10.2 15.4 27.2 40.2 44 48.4
2.2 Local Climate Data
Local climate data were required to establish the sensitivity of extreme precipitation to
monthly average precipitation and temperature. Local climate data were obtained from
Environment Canada for the 11 elements shown in Table 2-8.
AMEC Environment & Infrastructure 11