| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 0.06 | 2.26 | 0.32 | i | 0.56 | 0.89 | a | 3.77 | g | ||||
| 1941 | 1.30 | 1.11 | 0.79 | 1.51 | 2.10 | 2.50 | 0.61 | 1.25 | 1.05 | 1.13 | 1.07 | 0.84 | 15.26 | |||||||||||||
| 1942 | 1.79 | 1.15 | 0.41 | 1.62 | 4.13 | 0.81 | 0.31 | 0.09 | 0.00 | 1.30 | 1.81 | 1.01 | 14.43 | |||||||||||||
| 1943 | 1.34 | 0.59 | 0.86 | 1.85 | 1.35 | 3.68 | 0.27 | 0.04 | 0.00 | 1.75 | 0.47 | 0.61 | a | 12.81 | ||||||||||||
| 1944 | ----- | z | 1.05 | 1.15 | 3.17 | 0.92 | 2.15 | 0.48 | 0.13 | 0.50 | 0.44 | 0.94 | 0.61 | 11.54 | a | |||||||||||
| 1945 | 0.33 | 1.33 | 2.26 | 1.63 | 4.67 | 2.12 | 0.46 | 0.58 | 0.71 | 0.43 | 1.78 | 0.48 | 16.78 | |||||||||||||
| 1946 | 1.27 | a | 0.69 | 1.79 | a | 0.55 | 2.17 | 0.75 | 0.50 | 1.72 | 0.81 | 3.34 | 1.10 | 0.75 | 15.44 | |||||||||||
| 1947 | 0.40 | 0.32 | 1.59 | 0.78 | a | 3.37 | 3.03 | 0.02 | 0.20 | 0.49 | 0.78 | 1.99 | 0.61 | a | 13.58 | |||||||||||
| 1948 | 0.46 | 0.91 | 0.69 | a | 0.73 | 1.03 | 2.43 | 0.08 | 0.07 | 2.48 | 0.68 | 1.18 | 2.22 | 12.96 | ||||||||||||
| 1949 | 2.19 | 1.05 | 1.30 | 0.65 | 1.45 | 0.08 | 0.35 | 0.00 | 0.07 | 2.61 | 0.37 | 0.74 | 10.86 | |||||||||||||
| 1950 | 2.14 | 0.43 | 1.77 | 2.40 | 1.10 | 0.64 | 0.59 | 0.20 | 0.87 | 0.87 | 1.87 | 1.46 | k | 12.88 | a | |||||||||||
| 1951 | ----- | z | 0.43 | p | 1.38 | 1.40 | 1.32 | 0.64 | 1.00 | 1.54 | 0.00 | 1.68 | 0.97 | 2.84 | 12.77 | b | ||||||||||
| 1952 | 0.99 | 0.89 | 2.22 | 0.67 | 1.56 | 1.09 | 0.53 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 7.95 | e | |||||||
| 1953 | 0.47 | 0.98 | 0.95 | 2.47 | 2.26 | 1.33 | 0.05 | 0.13 | c | 0.10 | 1.29 | 0.76 | 1.34 | 12.13 | ||||||||||||
| 1954 | 1.28 | 0.22 | 1.08 | 1.26 | 0.04 | 2.02 | 0.09 | 0.07 | 0.00 | 0.41 | 0.00 | 0.65 | 7.12 | |||||||||||||
| 1955 | 0.89 | 1.42 | 1.05 | 0.98 | a | 1.98 | 1.35 | 0.77 | 0.11 | 0.68 | 0.71 | 1.15 | 1.30 | 12.39 | ||||||||||||
| 1956 | 1.89 | 0.33 | m | 0.79 | 0.89 | 2.57 | 0.00 | t | 0.40 | 0.23 | 0.09 | 2.98 | 0.34 | 1.13 | 11.31 | b | ||||||||||
| 1957 | 0.52 | 0.91 | a | 1.93 | 1.10 | 6.36 | 1.82 | 0.13 | 0.25 | 0.36 | 0.66 | 1.19 | 0.77 | 16.00 | ||||||||||||
| 1958 | 0.78 | 1.08 | 0.64 | 1.38 | 0.74 | 1.95 | 0.62 | 0.79 | 0.37 | 0.08 | 1.60 | 0.81 | 10.84 | |||||||||||||
| 1959 | 1.07 | 0.41 | 0.67 | 0.65 | 3.01 | 1.26 | 0.15 | 0.09 | 3.21 | 0.59 | 0.01 | 0.88 | 12.00 | |||||||||||||
| 1960 | 0.93 | 1.42 | 0.90 | 0.99 | 1.55 | 0.15 | 0.73 | 0.86 | 0.00 | b | 0.57 | 1.05 | 0.64 | 9.79 | ||||||||||||
| 1961 | 0.05 | 1.00 | 1.60 | 0.33 | 1.60 | 0.98 | 0.13 | 2.16 | 1.35 | 0.85 | 0.39 | 1.03 | 11.47 | |||||||||||||
| 1962 | 0.79 | 1.21 | 1.45 | 1.63 | 4.80 | 0.42 | 0.27 | 0.27 | 0.97 | 0.01 | j | 1.65 | 0.31 | 13.77 | a | |||||||||||
| 1963 | 0.83 | 1.31 | 0.78 | 3.00 | 2.34 | 5.43 | a | 0.00 | 1.19 | 1.12 | 0.70 | 1.60 | 1.55 | 19.85 | ||||||||||||
| 1964 | 1.46 | 0.77 | 0.53 | 1.73 | 2.07 | 3.63 | 0.38 | 0.08 | 0.33 | 0.77 | 0.93 | 2.61 | 15.29 | |||||||||||||
| 1965 | 1.26 | 0.52 | 0.35 | 1.88 | 2.57 | 2.51 | 0.99 | 1.99 | 0.68 | 0.37 | 1.49 | 1.32 | 15.93 | |||||||||||||
| 1966 | 0.50 | 0.64 | 0.79 | 0.41 | 0.80 | 0.61 | 0.10 | 0.04 | 0.47 | 0.83 | 1.72 | 1.14 | 8.05 | |||||||||||||
| 1967 | 0.74 | 0.15 | 1.10 | 3.07 | 1.00 | 3.26 | 0.59 | 0.65 | 0.64 | 0.74 | 0.61 | 0.54 | 13.09 | |||||||||||||
| 1968 | 0.77 | 0.91 | a | 0.87 | 0.86 | 1.32 | 2.61 | 0.44 | 2.90 | 0.19 | 0.63 | 1.63 | 2.02 | 15.15 | ||||||||||||
| 1969 | 0.65 | 1.29 | 0.43 | 0.89 | 0.59 | 2.20 | 0.82 | 0.00 | 0.70 | 1.87 | 0.42 | 1.18 | 11.04 | |||||||||||||
| 1970 | 1.49 | 0.21 | 1.59 | 1.56 | 2.55 | 5.60 | a | 0.60 | 0.36 | 1.40 | 1.22 | 1.90 | 1.23 | 19.71 | ||||||||||||
| 1971 | 2.00 | 1.44 | 1.42 | 3.54 | 3.67 | 2.12 | 0.26 | 0.22 | 0.47 | 1.76 | 1.85 | a | 0.80 | 19.55 | ||||||||||||
| 1972 | 1.46 | 1.07 | 1.04 | 0.81 | 0.17 | 0.81 | 0.08 | 0.30 | 0.95 | e | 3.01 | 0.58 | 1.35 | 11.63 | ||||||||||||
| 1973 | 0.92 | 0.16 | 1.27 | 0.33 | 0.75 | 2.68 | 1.17 | 0.43 | 1.72 | ----- | z | ----- | z | ----- | z | 9.43 | c | |||||||||
| 1974 | ----- | z | 0.60 | 1.51 | 0.92 | 0.15 | 0.18 | 0.25 | 0.85 | 0.00 | 2.34 | 0.17 | 1.48 | 8.45 | a | |||||||||||
| 1975 | 0.95 | 1.21 | 0.86 | 2.06 | 1.88 | 1.67 | 0.85 | 0.31 | 0.39 | 2.96 | 0.89 | 0.60 | 14.63 | |||||||||||||
| 1976 | 0.44 | 0.34 | b | 0.80 | 1.01 | 0.86 | 0.81 | 1.01 | ----- | z | 1.91 | 1.11 | 0.22 | 0.03 | 8.54 | a | ||||||||||
| 1977 | 0.11 | 0.24 | 0.36 | 0.90 | 1.30 | 1.80 | 1.55 | ----- | z | ----- | z | ----- | z | 0.97 | 1.03 | 8.26 | c | |||||||||
| 1978 | ----- | z | 0.75 | 0.32 | ----- | z | 0.58 | 0.18 | 0.21 | 0.01 | 1.72 | ----- | z | ----- | z | ----- | z | 3.77 | e | |||||||
| 1979 | 1.00 | c | 0.41 | 0.46 | ----- | z | ----- | z | ----- | z | 0.10 | 0.55 | 0.21 | 1.62 | 0.56 | 0.14 | 5.05 | c | ||||||||
| 1980 | 1.18 | 0.48 | 0.31 | 0.73 | 2.44 | ----- | z | 0.07 | ----- | z | 1.33 | ----- | z | 0.64 | 0.31 | 7.49 | c | |||||||||
| 1981 | 0.42 | a | 0.44 | 0.51 | 1.31 | 0.72 | 0.30 | 0.15 | 0.03 | 0.36 | 0.58 | a | 1.08 | 1.64 | 7.54 | |||||||||||
| 1982 | 0.68 | b | 0.41 | e | 1.46 | a | 0.70 | c | 1.46 | c | 1.89 | 1.49 | 0.24 | 2.25 | 0.87 | a | 0.27 | g | 0.58 | b | 12.03 | a | ||||
| 1983 | 0.06 | i | 0.79 | 1.08 | a | 0.67 | 0.99 | c | 1.06 | 0.85 | 1.77 | 0.50 | 1.02 | a | 1.84 | d | 3.11 | d | 13.68 | a | ||||||
| 1984 | 0.42 | a | 0.81 | 0.83 | 0.48 | 0.86 | 3.86 | 2.04 | 0.59 | c | ----- | z | ----- | z | 1.40 | 0.67 | c | 11.96 | b | |||||||
| 1985 | 0.71 | 0.85 | 1.61 | b | 0.76 | a | 2.33 | a | 0.00 | 1.36 | e | 0.00 | 1.55 | ----- | z | 1.90 | k | 1.44 | e | 10.61 | b | |||||
| 1986 | 0.51 | 2.56 | d | 0.77 | c | 2.42 | e | 0.96 | 1.27 | ----- | z | 0.52 | c | 2.08 | 0.55 | 0.77 | 0.15 | a | 12.56 | a | ||||||
| 1987 | 0.69 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.30 | s | 0.20 | ----- | z | ----- | z | ----- | z | ----- | z | 0.89 | j | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.95 | 0.83 | 1.05 | 1.33 | 1.83 | 1.76 | 0.52 | 0.55 | 0.85 | 1.21 | 1.04 | 1.06 | 13.40 | |||||||||||||
| S.D. | 0.53 | 0.46 | 0.51 | 0.82 | 1.32 | 1.34 | 0.47 | 0.68 | 0.79 | 0.85 | 0.58 | 0.69 | 3.37 | |||||||||||||
| SKEW | 0.64 | 1.03 | 0.52 | 1.07 | 1.37 | 1.01 | 1.22 | 1.71 | 1.05 | 1.14 | 0.01 | 1.23 | 0.13 | |||||||||||||
| MAX | 2.19 | 2.56 | 2.26 | 3.54 | 6.36 | 5.60 | 2.04 | 2.90 | 3.21 | 3.34 | 1.99 | 3.11 | 19.85 | |||||||||||||
| MIN | 0.05 | 0.15 | 0.31 | 0.33 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.08 | 0.00 | 0.03 | 7.12 | |||||||||||||
| YRS | 42 | 44 | 46 | 44 | 45 | 43 | 46 | 44 | 44 | 38 | 42 | 43 | 28 | |||||||||||||