YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.48 | j | ----- | z | ----- | z | 59.82 | 43.29 | 28.47 | a | 13.43 | b | 36.25 | h | ||
1968 | ----- | z | ----- | z | 30.53 | a | 42.17 | 51.60 | b | 62.33 | 66.27 | 64.62 | b | 57.50 | b | 45.60 | 29.67 | 10.00 | a | 46.03 | b | |||||
1969 | -0.03 | b | 13.20 | 17.11 | 44.83 | 54.44 | 55.83 | g | 66.84 | 72.02 | 58.15 | 39.45 | 29.05 | 15.65 | a | 37.34 | a | |||||||||
1970 | 0.18 | 8.76 | a | 15.77 | 37.37 | 51.58 | a | 67.63 | 70.42 | 67.03 | 58.41 | a | 43.47 | ----- | z | ----- | z | 42.06 | b | |||||||
1971 | -4.92 | 10.64 | 23.56 | 41.95 | a | 51.48 | 65.67 | 63.45 | 64.94 | 56.38 | 47.10 | 32.20 | y | 4.18 | q | 42.03 | b | |||||||||
1972 | -1.08 | a | 4.07 | a | 20.74 | 38.50 | a | 58.26 | b | 64.07 | a | 64.42 | 67.03 | a | 52.37 | 40.82 | a | 24.19 | c | 3.25 | a | 36.39 | ||||
1973 | 8.35 | a | 12.16 | 34.53 | 40.07 | 53.82 | i | 63.58 | 64.63 | 67.55 | 52.47 | 47.20 | d | 22.12 | 9.32 | c | 38.36 | a | ||||||||
1974 | 1.21 | b | 9.59 | 19.13 | 40.48 | 49.33 | a | 63.95 | 71.47 | 62.52 | a | 52.50 | 45.75 | a | 28.93 | a | 19.18 | c | 38.67 | |||||||
1975 | 9.27 | a | 8.94 | a | 16.38 | a | 33.13 | g | 57.90 | e | 62.18 | 70.60 | 64.08 | 51.75 | 46.35 | 28.19 | a | 10.05 | 38.70 | a | ||||||
1976 | 2.58 | a | 16.72 | 19.77 | a | 45.45 | 54.48 | a | 65.59 | b | 68.16 | 68.79 | 57.57 | 38.21 | 21.80 | 2.79 | b | 38.49 | ||||||||
1977 | -4.47 | 14.04 | c | 29.73 | a | 48.21 | b | 64.87 | 64.08 | 69.03 | a | 59.12 | a | 54.77 | 44.82 | 23.20 | 2.98 | b | 39.20 | |||||||
1978 | -2.68 | a | 4.02 | a | 21.53 | 40.47 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.28 | 3.82 | 14.74 | f | ||||
1979 | -6.98 | a | -0.38 | 20.97 | 34.48 | 47.26 | ----- | z | 68.39 | ----- | z | ----- | z | ----- | z | 25.55 | 20.47 | a | 26.22 | d | ||||||
1980 | ----- | z | ----- | z | ----- | z | ----- | z | 64.72 | m | 61.52 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.52 | k |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | 56.39 | i | 61.07 | 68.20 | a | 67.04 | d | 56.34 | h | 40.39 | d | 32.52 | d | 8.63 | d | 46.31 | f | |
1982 | -9.44 | d | 8.11 | f | 20.79 | b | 40.91 | b | 56.53 | a | 57.00 | f | 67.98 | 63.47 | a | 53.07 | b | 44.90 | b | 24.87 | g | 18.59 | c | 39.64 | c | |
1983 | 11.20 | f | 18.94 | c | 28.38 | b | 40.48 | 49.77 | 62.16 | a | 70.82 | a | 68.95 | 55.45 | a | 44.17 | v | 26.40 | j | -1.07 | c | 43.76 | c | |||
1984 | 7.33 | h | 24.52 | c | 21.12 | b | 46.04 | b | 51.84 | b | 64.21 | f | 68.74 | b | 71.41 | c | 53.00 | e | 46.23 | e | 26.04 | e | 7.52 | e | 41.65 | b |
1985 | 2.40 | e | 4.25 | d | 30.68 | 44.62 | 58.18 | 58.13 | d | 65.48 | d | 62.40 | b | 52.00 | a | 43.59 | b | 15.76 | a | -0.61 | h | 39.77 | a | |||
1986 | 15.70 | p | 8.38 | d | 27.73 | c | 43.03 | a | 56.03 | a | 64.02 | a | 68.55 | l | 64.68 | l | 54.52 | b | 44.38 | c | 20.50 | c | 16.48 | g | 39.82 | d |
1987 | 11.80 | h | 23.80 | a | 31.79 | g | ----- | z | ----- | z | 68.06 | m | 69.84 | 64.52 | 56.90 | 40.00 | a | 32.79 | d | 17.29 | c | 43.59 | e | |||
1988 | 0.29 | e | 1.23 | g | 24.84 | c | 41.23 | b | 57.33 | h | 70.37 | g | 71.64 | f | 68.64 | b | 56.27 | d | 40.31 | b | 25.29 | b | 11.70 | d | 33.57 | d |
1989 | 8.79 | b | -0.96 | b | 15.50 | c | 38.60 | a | 56.90 | a | 62.40 | a | 72.13 | a | 68.37 | a | 58.14 | a | 44.40 | a | 21.50 | a | 2.50 | a | 37.36 | |
1990 | 18.44 | 14.66 | 29.72 | a | 41.85 | 53.83 | b | 65.27 | 67.85 | 68.68 | 59.82 | 44.23 | 29.62 | 7.03 | 41.75 | |||||||||||
1991 | 0.89 | 17.48 | 26.39 | 44.35 | 57.85 | 66.90 | a | 67.20 | c | 69.03 | 54.48 | 38.18 | 19.45 | 13.47 | 39.64 | |||||||||||
1992 | 13.94 | 17.86 | 27.50 | 36.73 | 56.19 | 59.63 | 60.23 | a | 61.55 | a | 53.02 | a | 41.45 | 24.60 | 6.35 | a | 38.25 | |||||||||
1993 | 3.03 | 5.57 | 21.71 | 39.77 | 53.00 | 58.97 | ----- | z | 65.26 | 49.88 | 38.53 | 21.62 | 14.06 | f | 35.73 | b | ||||||||||
1994 | -8.64 | c | -0.45 | 27.60 | 39.25 | 55.02 | 64.27 | 64.96 | c | 62.88 | c | 58.12 | 47.47 | 30.87 | 19.03 | b | 38.36 | |||||||||
1995 | 6.26 | 4.83 | a | 27.11 | c | 34.53 | 51.55 | 69.07 | a | 66.66 | c | 67.03 | 54.90 | a | 42.02 | 16.58 | 14.50 | k | 40.05 | a | ||||||
1996 | 19.75 | u | 15.82 | j | ----- | z | 30.41 | b | 51.68 | 64.74 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.94 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.78 | 10.46 | 23.95 | 40.63 | 54.33 | 63.51 | 67.56 | 66.12 | 55.25 | 43.12 | 24.98 | 10.09 | 38.68 | |||||||||||||
S.D. | 7.17 | 7.34 | 5.30 | 4.01 | 3.85 | 2.72 | 2.84 | 3.20 | 2.77 | 2.98 | 4.74 | 6.38 | 1.50 | |||||||||||||
SKEW | 0.51 | 0.21 | 0.06 | -0.48 | 0.59 | -0.07 | -0.58 | -0.19 | -0.01 | -0.25 | -0.13 | 0.11 | 0.61 | |||||||||||||
MAX | 18.44 | 24.52 | 34.53 | 48.21 | 64.87 | 69.07 | 72.13 | 72.02 | 59.82 | 47.47 | 32.79 | 20.47 | 41.75 | |||||||||||||
MIN | -9.44 | -0.96 | 15.50 | 30.41 | 47.26 | 58.13 | 60.23 | 59.12 | 49.88 | 38.18 | 15.76 | -1.07 | 36.39 | |||||||||||||
YRS | 21 | 23 | 25 | 25 | 23 | 22 | 23 | 24 | 25 | 25 | 24 | 22 | 9 |