YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | ----- | z | ----- | z | 56.19 | 65.40 | 75.55 | 68.65 | 58.45 | 47.79 | 31.91 | h | 25.92 | e | 56.85 | e | ||||||
1958 | 20.60 | 11.76 | a | 31.76 | 46.43 | 60.40 | 60.39 | b | 67.58 | a | 69.29 | 62.02 | 51.57 | a | 32.88 | a | 13.58 | a | 44.02 | |||||||
1959 | 9.02 | e | 14.77 | 33.03 | 44.96 | c | 60.53 | 70.42 | 70.89 | 72.81 | 60.88 | 43.32 | a | 23.88 | 28.14 | i | 45.86 | a | ||||||||
1960 | 13.95 | a | 15.00 | c | 17.35 | a | 45.55 | 56.82 | 64.48 | 71.00 | 70.06 | 61.55 | 50.24 | 35.27 | b | 17.94 | 43.27 | |||||||||
1961 | 15.15 | d | 24.52 | 34.27 | 39.18 | 55.11 | 68.50 | 69.29 | 70.93 | b | 59.67 | a | 50.61 | 32.87 | 14.69 | 44.57 | ||||||||||
1962 | 10.00 | d | 14.82 | 24.76 | 43.25 | b | 61.65 | 66.07 | 69.16 | 69.24 | 58.43 | 53.11 | 37.69 | a | 21.27 | 44.12 | ||||||||||
1963 | 3.97 | 15.36 | 35.31 | 48.33 | 57.58 | 71.77 | 72.05 | 68.52 | 63.50 | 58.82 | 38.90 | 10.93 | a | 45.42 | ||||||||||||
1964 | 21.77 | 25.67 | 25.50 | 47.28 | 61.76 | 69.55 | 74.87 | 66.78 | b | ----- | z | ----- | z | ----- | z | ----- | z | 49.15 | d | |||||||
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.91 | n | 71.92 | 69.74 | 53.55 | 52.72 | a | 33.20 | 27.71 | 51.47 | f | |||||
1966 | 2.21 | 14.64 | 37.53 | 41.68 | 54.72 | a | 68.58 | 75.75 | a | 67.70 | a | 61.45 | 49.07 | a | 29.56 | d | 19.88 | k | 45.72 | a | ||||||
1967 | 15.85 | 10.14 | 31.97 | 45.90 | 53.90 | 66.73 | 70.11 | 67.82 | 60.60 | a | 48.60 | a | 33.31 | a | 22.60 | 43.96 | ||||||||||
1968 | 15.31 | 16.21 | 40.89 | 49.55 | 54.53 | 68.57 | 71.00 | 70.60 | 61.21 | a | 51.16 | b | 34.24 | a | 17.03 | 45.86 | ||||||||||
1969 | 7.16 | 16.74 | a | 20.79 | c | 49.77 | d | 60.61 | 61.75 | 72.53 | 72.18 | a | 62.67 | 46.82 | 33.07 | 17.73 | 43.48 | |||||||||
1970 | 2.77 | a | 14.00 | 22.45 | 44.80 | 61.30 | a | 70.65 | 73.68 | 71.10 | 61.82 | 49.00 | 31.65 | 16.45 | 43.31 | |||||||||||
1971 | 6.76 | 17.32 | 28.13 | 47.83 | 56.74 | 70.93 | 68.26 | 69.39 | 61.68 | 53.66 | 32.55 | 15.82 | 44.09 | |||||||||||||
1972 | 6.56 | 10.91 | 27.69 | 43.08 | 62.20 | a | 67.62 | 70.19 | 70.06 | 60.12 | 46.57 | b | 32.33 | a | 12.27 | 42.47 | ||||||||||
1973 | 18.90 | 23.29 | 40.42 | 45.08 | 56.92 | 70.32 | 71.92 | 72.03 | a | 60.57 | 55.53 | 35.25 | 15.87 | 47.18 | ||||||||||||
1974 | 10.45 | 17.00 | 30.85 | 47.80 | 55.74 | 67.48 | 76.94 | 67.32 | 59.50 | 52.14 | b | 33.91 | b | 22.87 | 45.17 | |||||||||||
1975 | 13.55 | 13.70 | 21.03 | 38.42 | 62.84 | 68.08 | 75.00 | 71.11 | 58.67 | 53.78 | b | 36.25 | 20.37 | a | 44.40 | |||||||||||
1976 | 12.19 | 28.66 | 32.90 | 52.37 | 59.02 | 71.23 | 75.65 | 72.63 | 62.78 | 44.87 | 27.25 | 12.92 | 46.04 | |||||||||||||
1977 | -0.43 | a | 24.61 | 37.23 | 54.33 | 67.44 | 69.62 | 74.18 | a | 66.95 | 62.57 | 48.21 | 31.73 | 15.19 | 45.97 | |||||||||||
1978 | 4.79 | 10.27 | 30.27 | 45.28 | 61.22 | b | 69.18 | 70.77 | 70.44 | 67.20 | 51.16 | 30.92 | 13.74 | 43.77 | ||||||||||||
1979 | -0.08 | 5.91 | 25.65 | 41.42 | 55.50 | 68.36 | a | 71.56 | 68.02 | 63.13 | 48.47 | 31.45 | 25.67 | a | 42.09 | |||||||||||
1980 | 16.82 | 14.98 | 27.63 | 50.08 | 62.87 | a | 68.93 | 74.21 | 70.11 | 62.10 | 46.15 | 37.62 | a | 19.98 | 45.96 | |||||||||||
1981 | 18.08 | a | 23.79 | 39.47 | 51.48 | a | 58.47 | 68.03 | 72.47 | 68.98 | a | 60.75 | 47.68 | 37.45 | 14.02 | 46.72 | ||||||||||
1982 | 0.88 | a | 13.42 | b | 29.05 | 43.84 | a | 61.65 | 64.07 | 73.83 | m | 70.71 | 60.14 | b | 49.58 | a | 29.46 | e | 24.98 | e | 40.71 | a | ||||
1983 | 18.73 | e | 24.02 | f | 31.60 | b | 41.55 | a | 54.07 | a | 66.63 | 76.13 | a | 75.08 | a | 61.02 | a | 48.19 | 32.50 | c | 0.22 | f | 50.55 | b | ||
1984 | 12.02 | d | 25.54 | b | 24.10 | b | 46.07 | a | 55.24 | b | 69.14 | a | 71.45 | 72.67 | a | 56.29 | b | 50.57 | d | 33.50 | b | 15.48 | g | 46.96 | a | |
1985 | 7.70 | f | 13.87 | a | 36.54 | c | 50.22 | 61.52 | b | 63.72 | 71.89 | 64.75 | c | 59.86 | e | 45.64 | b | 24.54 | c | 4.71 | e | 45.20 | a | |||
1986 | 18.78 | h | 13.89 | a | 34.90 | g | 48.07 | b | 59.36 | b | 69.33 | c | 73.18 | 66.19 | 58.45 | a | 48.81 | d | 26.89 | c | 22.54 | c | 48.67 | b | ||
1987 | 19.82 | a | 31.46 | 37.65 | a | 54.45 | a | 62.59 | b | 71.85 | 74.48 | 67.81 | 61.38 | a | 44.22 | d | 37.94 | d | 23.24 | b | 48.91 | |||||
1988 | 7.43 | d | 12.04 | e | 33.22 | b | 46.32 | b | 64.84 | 74.73 | 76.24 | 73.81 | 61.95 | a | 43.11 | 31.98 | b | 18.66 | b | 45.36 | ||||||
1989 | 20.53 | b | 9.21 | b | 27.04 | e | 44.36 | b | 57.40 | a | 66.90 | 75.42 | 70.31 | 59.60 | a | 49.87 | 27.02 | b | 9.77 | 43.12 | ||||||
1990 | 24.65 | a | 21.70 | a | 33.90 | a | 46.02 | b | 55.68 | a | 69.28 | 71.27 | 69.68 | 63.75 | 46.48 | 35.39 | b | 14.44 | 46.02 | |||||||
1991 | 10.03 | a | 24.57 | 32.62 | a | 48.07 | 60.76 | 71.91 | a | 72.39 | 71.13 | e | ----- | z | 48.98 | k | ----- | z | ----- | z | 48.94 | d | ||||
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.67 | a | 17.67 | k |
1993 | 11.24 | b | 14.32 | 27.38 | a | 42.92 | 56.55 | 64.19 | a | 69.48 | c | 69.85 | 55.03 | a | 45.50 | a | 30.13 | c | 19.03 | a | 42.14 | |||||
1994 | 4.19 | b | 9.57 | 32.98 | 44.74 | a | 60.80 | a | 69.36 | b | 69.74 | 67.79 | 63.43 | b | 51.60 | b | 36.85 | c | 23.19 | b | 44.52 | |||||
1995 | 16.05 | c | 19.09 | 33.24 | b | 40.84 | a | 57.02 | 71.95 | 73.58 | 73.65 | 59.66 | a | 47.09 | b | 25.50 | 18.24 | b | 44.66 | |||||||
1996 | 6.87 | 17.25 | c | 24.48 | 39.52 | c | 54.65 | 70.16 | a | 70.62 | a | 70.19 | 60.52 | b | 47.65 | d | 23.29 | a | 10.86 | c | 41.34 | |||||
1997 | 5.57 | d | 18.50 | c | 29.63 | a | 43.81 | c | 53.25 | c | 71.59 | a | 70.88 | c | 69.25 | a | ----- | z | 55.55 | c | 27.03 | 25.63 | 42.79 | a | ||
1998 | 17.00 | f | 29.02 | d | 29.45 | b | 49.36 | b | 64.07 | d | 67.24 | a | 73.66 | 72.12 | b | 66.62 | 52.52 | e | 35.65 | d | 28.00 | d | 51.61 | a | ||
1999 | 9.04 | g | 28.08 | c | 33.80 | a | 47.15 | 59.55 | a | 68.15 | 75.98 | e | 70.11 | 61.05 | b | 46.84 | c | ----- | z | 19.64 | q | 54.52 | c | |||
2000 | 14.13 | d | 25.30 | d | 37.93 | h | 44.75 | d | 59.97 | 65.57 | a | ----- | z | 70.50 | 60.08 | e | 51.48 | a | 29.88 | a | 5.74 | 42.74 | b | |||
2001 | 16.98 | d | 7.41 | f | 25.30 | a | 45.96 | b | ----- | z | 68.27 | 73.76 | 71.87 | a | 60.23 | 46.90 | a | 46.21 | b | 25.34 | b | 48.08 | b | |||
2002 | 23.52 | c | 27.34 | 22.63 | a | 43.60 | a | 52.98 | a | 70.05 | b | 75.03 | 68.92 | 62.73 | 41.16 | 31.28 | 24.42 | a | 45.31 | |||||||
2003 | 13.72 | b | 13.82 | c | 30.86 | c | 47.12 | b | 56.65 | 66.32 | 71.56 | 73.06 | ----- | z | ----- | z | ----- | z | ----- | z | 46.64 | d | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 11.79 | 17.91 | 30.29 | 45.97 | 58.70 | 68.29 | 72.57 | 70.04 | 60.87 | 49.16 | 32.40 | 18.23 | 44.59 | |||||||||||||
S.D. | 6.81 | 6.45 | 5.60 | 3.71 | 3.46 | 2.85 | 2.38 | 2.15 | 2.52 | 3.62 | 4.58 | 5.87 | 1.66 | |||||||||||||
SKEW | -0.04 | 0.40 | -0.15 | 0.20 | 0.27 | -0.55 | -0.02 | -0.01 | -0.32 | 0.26 | 0.23 | -0.28 | 0.29 | |||||||||||||
MAX | 24.65 | 31.46 | 40.89 | 54.45 | 67.44 | 74.73 | 76.94 | 75.08 | 67.20 | 58.82 | 46.21 | 28.00 | 48.91 | |||||||||||||
MIN | -0.43 | 5.91 | 17.35 | 38.42 | 52.98 | 60.39 | 67.58 | 64.75 | 53.55 | 41.16 | 23.29 | 4.71 | 41.34 | |||||||||||||
YRS | 40 | 42 | 42 | 44 | 44 | 45 | 44 | 46 | 42 | 43 | 41 | 39 | 29 |