YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | 39.90 | 49.63 | 60.74 | 52.84 | 46.73 | 31.77 | 23.77 | 13.90 | 39.91 | d | ||||||||
1967 | 16.42 | 17.64 | 24.52 | 30.97 | 37.55 | 48.67 | 55.23 | 51.74 | 45.00 | 33.90 | 20.17 | 10.68 | 32.71 | |||||||||||||
1968 | 12.10 | 18.79 | 23.32 | 25.10 | 36.39 | 48.90 | 54.48 | 51.23 | a | 42.27 | 35.07 | a | 21.33 | 11.48 | 31.71 | |||||||||||
1969 | 12.84 | 18.39 | 17.23 | 33.03 | 44.00 | 47.20 | 57.42 | 57.39 | 48.63 | 28.87 | 23.37 | 17.50 | a | 33.82 | ||||||||||||
1970 | 12.27 | a | 18.30 | a | 18.81 | 26.38 | a | 41.68 | 48.10 | 53.17 | b | 56.16 | 41.70 | 30.03 | 22.37 | 12.10 | 31.75 | |||||||||
1971 | 13.19 | 16.71 | 19.00 | 30.60 | 39.10 | 49.60 | 53.87 | 54.45 | 41.33 | 32.26 | 20.73 | 11.97 | 31.90 | |||||||||||||
1972 | 8.81 | 18.31 | 25.17 | a | 30.33 | 40.29 | 51.63 | 52.65 | 54.74 | 44.57 | 34.90 | 19.40 | 8.16 | 32.41 | ||||||||||||
1973 | 13.45 | 18.93 | 25.68 | 27.27 | 38.84 | 48.83 | 54.23 | 54.45 | 44.50 | 35.81 | 22.97 | a | 16.39 | 33.44 | ||||||||||||
1974 | 8.61 | 19.57 | 23.81 | 29.77 | 39.06 | 48.70 | 54.39 | 49.94 | 39.23 | 34.42 | 21.43 | 12.71 | 31.80 | |||||||||||||
1975 | 13.90 | 12.32 | 19.61 | 28.40 | 39.13 | a | 46.77 | 56.39 | 53.42 | 41.53 | 31.84 | 18.13 | 18.94 | 31.70 | ||||||||||||
1976 | 12.23 | a | 20.76 | 18.16 | 32.77 | 40.45 | 48.83 | 57.32 | 53.42 | 46.63 | 30.00 | 19.23 | 15.74 | 32.96 | ||||||||||||
1977 | 6.77 | 19.43 | 20.19 | 34.77 | 44.77 | 53.80 | 58.90 | 54.19 | 48.10 | 32.93 | a | 22.17 | 15.87 | 34.33 | ||||||||||||
1978 | 7.35 | 11.96 | 24.13 | 33.27 | 40.10 | 50.20 | 56.52 | 51.45 | 45.70 | 31.65 | 19.90 | 5.94 | 31.51 | |||||||||||||
1979 | 0.58 | 12.82 | 23.63 | a | 30.80 | 39.19 | 49.03 | 56.68 | 53.16 | 47.93 | 35.71 | 17.30 | 16.77 | 31.97 | ||||||||||||
1980 | 8.13 | 15.31 | 19.55 | 29.37 | 40.17 | a | 49.87 | 58.06 | 53.68 | 44.60 | 30.84 | 20.87 | 19.43 | a | 32.49 | |||||||||||
1981 | 14.13 | 11.46 | ----- | z | ----- | z | 39.04 | h | 49.80 | 55.87 | 51.87 | 44.73 | 32.48 | 22.30 | 12.74 | 32.82 | c | |||||||||
1982 | 5.80 | a | 10.44 | a | 20.26 | 24.00 | 37.10 | 44.57 | 53.39 | 54.27 | a | 43.03 | 29.00 | 15.17 | 13.57 | a | 29.22 | |||||||||
1983 | 15.48 | 16.75 | 22.39 | 24.14 | a | 34.71 | 45.17 | 52.19 | 55.29 | 41.40 | 29.74 | 17.37 | -0.47 | a | 29.51 | |||||||||||
1984 | 5.87 | 15.38 | 16.55 | 22.73 | 37.48 | 44.67 | 52.19 | 52.13 | 37.97 | 26.45 | 15.47 | 8.39 | 27.94 | |||||||||||||
1985 | 6.73 | a | 8.32 | 22.23 | 33.13 | 42.03 | 47.40 | 56.06 | 52.39 | 41.63 | 28.65 | 10.57 | ----- | z | 31.74 | a | ||||||||||
1986 | 15.16 | 15.04 | 26.16 | ----- | z | ----- | z | 50.57 | 53.71 | 51.03 | 42.03 | 32.32 | 19.50 | 11.65 | 31.72 | b | ||||||||||
1987 | 12.37 | a | 18.18 | 18.97 | 31.03 | 45.63 | a | 51.79 | a | 57.13 | a | 55.13 | 45.87 | g | 32.35 | 24.60 | 14.59 | b | 32.89 | a | ||||||
1988 | 7.81 | 17.00 | 23.07 | b | 31.17 | 41.65 | 55.83 | 56.48 | 57.03 | 45.80 | 35.55 | 23.70 | 14.45 | 34.13 | ||||||||||||
1989 | 15.65 | 9.04 | 24.77 | a | 32.79 | a | 41.81 | 50.77 | 58.77 | 55.41 | b | 46.47 | 35.26 | 24.60 | 11.13 | 33.87 | ||||||||||
1990 | 17.10 | 17.54 | 24.58 | 33.37 | 38.83 | a | 54.03 | a | 55.29 | 55.04 | e | 50.11 | b | 34.68 | 24.43 | 8.80 | a | 34.48 | ||||||||
1991 | 10.81 | 21.75 | 25.29 | 32.33 | 44.94 | 54.07 | 57.16 | 56.21 | b | 46.11 | c | 33.61 | 22.50 | 17.48 | 35.19 | |||||||||||
1992 | 17.35 | 24.07 | 29.45 | 34.80 | 42.71 | 51.17 | 55.73 | a | 52.27 | a | 46.80 | 35.45 | 20.87 | 7.29 | 34.83 | |||||||||||
1993 | 9.42 | 13.46 | 27.97 | a | 32.77 | 41.90 | 48.24 | a | 55.00 | 54.07 | a | 41.00 | e | 32.10 | 16.73 | 17.61 | 32.52 | |||||||||
1994 | 16.77 | a | 10.36 | 25.50 | a | 31.52 | a | 43.77 | a | 54.86 | a | 55.77 | 56.23 | a | 47.07 | 36.35 | 22.77 | 19.29 | 35.02 | |||||||
1995 | 14.61 | 20.04 | 23.13 | 28.80 | 38.97 | 49.20 | 54.65 | e | 56.45 | 46.68 | b | 31.42 | 23.87 | 15.45 | 33.61 | |||||||||||
1996 | 9.42 | 15.79 | 18.81 | 29.87 | 42.77 | 51.90 | 56.97 | 55.26 | 45.53 | 33.55 | 20.27 | 14.16 | 32.86 | |||||||||||||
1997 | 11.81 | 17.82 | 23.97 | 25.33 | 40.71 | 53.17 | 56.53 | a | 55.70 | a | 48.21 | a | 32.27 | a | 20.83 | a | 17.32 | 33.64 | ||||||||
1998 | 15.30 | a | 20.93 | 21.87 | 28.53 | 43.19 | 46.37 | 59.13 | 55.90 | 50.33 | 37.26 | 27.93 | 14.27 | a | 35.08 | |||||||||||
1999 | 19.32 | 22.19 | a | 24.03 | 29.87 | 40.29 | 49.60 | 58.90 | 56.71 | 43.23 | 31.97 | 26.00 | 19.45 | 35.13 | ||||||||||||
2000 | 16.35 | 19.50 | c | 25.87 | 29.93 | a | 42.50 | a | 49.37 | 59.45 | 56.74 | 45.50 | 35.65 | 15.24 | a | 11.10 | 33.93 | |||||||||
2001 | 14.65 | 13.36 | 24.58 | 33.18 | b | 42.29 | 50.52 | a | 60.03 | a | 55.43 | a | 47.03 | 32.94 | 23.47 | 15.38 | b | 34.40 | ||||||||
2002 | 11.81 | 13.54 | 15.42 | 30.97 | 39.55 | 52.63 | 57.29 | 54.97 | a | 47.00 | 28.58 | 22.57 | 17.90 | a | 32.68 | |||||||||||
2003 | 17.35 | 11.73 | b | 24.70 | a | 35.60 | 43.03 | a | 49.38 | a | 60.10 | 57.70 | a | 42.90 | 35.20 | a | 20.18 | b | 16.13 | 34.50 | ||||||
2004 | 14.61 | 14.79 | 25.74 | 33.37 | 42.84 | 49.10 | 55.00 | 51.74 | 47.20 | 36.03 | a | 22.07 | a | ----- | z | 35.68 | a | |||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.17 | 16.26 | 22.65 | 30.33 | 40.79 | 49.84 | 56.23 | 54.29 | 44.90 | 32.79 | 20.93 | 13.66 | 32.94 | |||||||||||||
S.D. | 4.12 | 3.87 | 3.30 | 3.24 | 2.51 | 2.67 | 2.25 | 1.99 | 2.93 | 2.59 | 3.38 | 4.29 | 1.75 | |||||||||||||
SKEW | -0.61 | -0.21 | -0.35 | -0.67 | -0.19 | 0.18 | 0.10 | -0.28 | -0.34 | -0.39 | -0.76 | -1.05 | -0.97 | |||||||||||||
MAX | 19.32 | 24.07 | 29.45 | 35.60 | 45.63 | 55.83 | 60.74 | 57.70 | 50.33 | 37.26 | 27.93 | 19.45 | 35.19 | |||||||||||||
MIN | 0.58 | 8.32 | 15.42 | 22.73 | 34.71 | 44.57 | 52.19 | 49.94 | 37.97 | 26.45 | 10.57 | -0.47 | 27.94 | |||||||||||||
YRS | 38 | 38 | 37 | 36 | 37 | 39 | 39 | 39 | 38 | 39 | 39 | 37 | 33 |