| 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 | 0.98 | 0.15 | i | 0.15 | 0.49 | a | ----- | z | ||||
| 1941 | 0.34 | 0.47 | 0.50 | 0.60 | 0.55 | 1.33 | 0.42 | 0.36 | 0.63 | 0.31 | 0.44 | 0.30 | 1.33 | |||||||||||||
| 1942 | 0.44 | 0.21 | 0.23 | 0.65 | 0.90 | 0.35 | 0.31 | 0.09 | 0.00 | 1.10 | 0.45 | 0.29 | 1.10 | |||||||||||||
| 1943 | 0.33 | 0.31 | 0.30 | 0.50 | 0.30 | 0.85 | 0.17 | 0.04 | 0.00 | 0.50 | 0.31 | 0.22 | a | 0.85 | a | |||||||||||
| 1944 | ----- | z | 0.29 | 0.27 | 0.60 | 0.30 | 0.48 | 0.22 | 0.13 | 0.26 | 0.25 | 0.22 | 0.36 | ----- | z | |||||||||||
| 1945 | 0.15 | 0.31 | 0.61 | 0.73 | 0.94 | 0.44 | 0.35 | 0.42 | 0.42 | 0.15 | 0.62 | 0.25 | 0.94 | |||||||||||||
| 1946 | 0.29 | a | 0.15 | 0.35 | a | 0.16 | 0.60 | 0.32 | 0.21 | 0.48 | 0.71 | 1.26 | 0.36 | 0.57 | 1.26 | b | ||||||||||
| 1947 | 0.11 | 0.32 | 0.54 | 0.31 | a | 1.08 | 1.04 | 0.02 | 0.10 | 0.27 | 0.24 | 0.44 | 0.19 | a | 1.08 | b | ||||||||||
| 1948 | 0.26 | 0.32 | 0.15 | a | 0.26 | 0.33 | 0.72 | 0.03 | 0.05 | 2.05 | 0.31 | 0.22 | 0.42 | 2.05 | a | |||||||||||
| 1949 | 0.40 | 0.60 | 0.80 | 0.40 | 0.35 | 0.04 | 0.20 | 0.00 | 0.07 | 0.72 | 0.27 | 0.30 | 0.80 | |||||||||||||
| 1950 | 0.75 | 0.15 | 0.37 | 0.80 | 0.26 | 0.44 | 0.29 | 0.15 | 0.56 | 0.53 | 0.60 | 0.65 | k | 0.80 | k | |||||||||||
| 1951 | ----- | z | 0.25 | p | 0.28 | 0.75 | 0.50 | 0.30 | 0.65 | 0.71 | 0.00 | 0.45 | 0.34 | 0.64 | ----- | z | ||||||||||
| 1952 | 0.25 | 0.40 | 0.60 | 0.27 | 0.60 | 0.45 | 0.38 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||||||
| 1953 | 0.15 | 0.22 | 0.62 | 0.65 | 0.45 | 0.86 | 0.03 | 0.09 | c | 0.10 | 0.75 | 0.23 | 0.40 | 0.86 | c | |||||||||||
| 1954 | 0.53 | 0.11 | 0.25 | 0.59 | 0.04 | 0.64 | 0.07 | 0.07 | 0.00 | 0.29 | 0.00 | 0.33 | 0.64 | |||||||||||||
| 1955 | 0.40 | 0.41 | 0.25 | 0.38 | a | 0.51 | 0.70 | 0.31 | 0.08 | 0.37 | 0.25 | 0.30 | 0.58 | 0.70 | a | |||||||||||
| 1956 | 0.42 | 0.09 | m | 0.30 | 0.23 | 0.76 | 0.00 | t | 0.13 | 0.06 | 0.09 | 1.51 | 0.22 | 0.20 | ----- | z | ||||||||||
| 1957 | 0.40 | 0.30 | a | 0.40 | 0.34 | 0.69 | 0.38 | 0.09 | 0.25 | 0.32 | 0.35 | 0.87 | 0.26 | 0.87 | a | |||||||||||
| 1958 | 0.27 | 0.20 | 0.22 | 0.30 | 0.31 | 0.62 | 0.30 | 0.29 | 0.29 | 0.08 | 0.74 | 0.28 | 0.74 | |||||||||||||
| 1959 | 0.32 | 0.11 | 0.20 | 0.27 | 0.47 | 0.65 | 0.08 | 0.09 | 0.53 | 0.30 | 0.01 | 0.51 | 0.65 | |||||||||||||
| 1960 | 0.25 | 0.31 | 0.16 | 0.31 | 0.48 | 0.11 | 0.25 | 0.37 | 0.00 | b | 0.20 | 0.31 | 0.27 | 0.48 | b | |||||||||||
| 1961 | 0.03 | 0.33 | 0.32 | 0.17 | 0.59 | 0.35 | 0.08 | 1.05 | 0.85 | 0.63 | 0.13 | 0.43 | 1.05 | |||||||||||||
| 1962 | 0.20 | 0.46 | 0.58 | 0.85 | 1.53 | 0.13 | 0.16 | 0.10 | 0.62 | 0.01 | j | 0.76 | 0.21 | 1.53 | j | |||||||||||
| 1963 | 0.39 | 0.44 | 0.42 | 1.92 | 0.76 | 1.19 | a | 0.00 | 0.35 | 0.26 | 0.30 | 0.48 | 0.66 | 1.92 | a | |||||||||||
| 1964 | 0.40 | 0.26 | 0.13 | 0.32 | 1.42 | 0.77 | 0.30 | 0.08 | 0.33 | 0.70 | 0.25 | 0.57 | 1.42 | |||||||||||||
| 1965 | 0.42 | 0.34 | 0.10 | 0.38 | 0.76 | 0.94 | 0.47 | 1.30 | 0.40 | 0.37 | 1.00 | 0.58 | 1.30 | |||||||||||||
| 1966 | 0.16 | 0.14 | 0.23 | 0.14 | 0.46 | 0.40 | 0.05 | 0.03 | 0.24 | 0.34 | 0.42 | 0.24 | 0.46 | |||||||||||||
| 1967 | 0.22 | 0.10 | 0.62 | 0.82 | 0.23 | 0.98 | 0.31 | 0.24 | 0.18 | 0.39 | 0.33 | 0.12 | 0.98 | |||||||||||||
| 1968 | 0.29 | 0.18 | a | 0.31 | 0.31 | 0.46 | 2.04 | 0.18 | 0.70 | 0.19 | 0.31 | 0.46 | 0.56 | 2.04 | a | |||||||||||
| 1969 | 0.24 | 0.35 | 0.10 | 0.29 | 0.41 | 0.50 | 0.60 | 0.00 | 0.31 | 0.44 | 0.20 | 0.30 | 0.60 | |||||||||||||
| 1970 | 0.48 | 0.10 | 0.44 | 0.61 | 0.92 | 1.25 | a | 0.27 | 0.22 | 0.57 | 0.37 | 0.36 | 0.34 | 1.25 | a | |||||||||||
| 1971 | 0.53 | 0.35 | 0.47 | 1.16 | 1.45 | 0.63 | 0.11 | 0.12 | 0.20 | 0.40 | 0.83 | a | 0.36 | 1.45 | a | |||||||||||
| 1972 | 0.56 | 0.96 | 0.37 | 0.19 | 0.06 | 0.32 | 0.08 | 0.25 | 0.70 | e | 0.98 | 0.15 | 0.62 | 0.98 | e | |||||||||||
| 1973 | 0.31 | 0.05 | 0.41 | 0.11 | 0.51 | 1.28 | 0.65 | 0.24 | 0.87 | ----- | z | ----- | z | ----- | z | ----- | z | |||||||||
| 1974 | ----- | z | 0.18 | 0.63 | 0.30 | 0.11 | 0.17 | 0.20 | 0.70 | 0.00 | 0.51 | 0.09 | 0.30 | ----- | z | |||||||||||
| 1975 | 0.50 | 0.52 | 0.24 | 0.58 | 0.95 | 0.46 | 0.27 | 0.14 | 0.24 | 0.80 | 0.35 | 0.18 | 0.95 | |||||||||||||
| 1976 | 0.28 | 0.15 | b | 0.22 | 0.49 | 0.53 | 0.41 | 0.51 | ----- | z | 0.77 | 0.86 | 0.19 | 0.03 | ----- | z | ||||||||||
| 1977 | 0.07 | 0.11 | 0.20 | 0.60 | 0.39 | 0.56 | 0.75 | ----- | z | ----- | z | ----- | z | 0.21 | 0.28 | ----- | z | |||||||||
| 1978 | ----- | z | 0.41 | 0.17 | ----- | z | 0.15 | 0.11 | 0.09 | 0.01 | 0.53 | ----- | z | ----- | z | ----- | z | ----- | z | |||||||
| 1979 | 0.27 | c | 0.10 | 0.29 | ----- | z | ----- | z | ----- | z | 0.10 | 0.33 | 0.21 | 0.80 | 0.34 | 0.06 | ----- | z | ||||||||
| 1980 | 0.28 | 0.19 | 0.07 | 0.47 | 0.55 | ----- | z | 0.05 | ----- | z | 0.44 | ----- | z | 0.45 | 0.15 | ----- | z | |||||||||
| 1981 | 0.36 | a | 0.26 | 0.15 | 0.36 | 0.25 | 0.29 | 0.15 | 0.02 | 0.24 | 0.21 | a | 0.78 | 0.34 | 0.78 | b | ||||||||||
| 1982 | 0.33 | b | 0.20 | e | 0.33 | a | 0.28 | c | 0.80 | c | 0.46 | 0.35 | 0.18 | 0.74 | 0.25 | a | 0.15 | g | 0.37 | b | 0.80 | x | ||||
| 1983 | 0.03 | i | 0.46 | 0.40 | a | 0.25 | 0.30 | c | 0.60 | 0.54 | 0.70 | 0.23 | 0.53 | a | 0.75 | d | 0.65 | d | 0.75 | v | ||||||
| 1984 | 0.21 | a | 0.42 | 0.24 | 0.12 | 0.21 | 1.82 | 0.91 | 0.34 | c | ----- | z | ----- | z | 0.38 | 0.37 | c | ----- | z | |||||||
| 1985 | 0.30 | 0.50 | 0.68 | b | 0.76 | a | 0.49 | a | 0.00 | 0.27 | e | 0.00 | 0.60 | ----- | z | 0.65 | k | 0.73 | e | ----- | z | |||||
| 1986 | 0.15 | 0.95 | d | 0.45 | c | 0.57 | e | 0.44 | 0.73 | ----- | z | 0.27 | c | 0.95 | 0.55 | 0.48 | 0.15 | a | ----- | z | ||||||
| 1987 | 0.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.30 | s | 0.20 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.32 | 0.31 | 0.35 | 0.48 | 0.56 | 0.63 | 0.26 | 0.26 | 0.42 | 0.51 | 0.39 | 0.36 | 1.06 | |||||||||||||
| S.D. | 0.14 | 0.20 | 0.18 | 0.32 | 0.35 | 0.44 | 0.21 | 0.28 | 0.38 | 0.32 | 0.24 | 0.17 | 0.44 | |||||||||||||
| SKEW | 0.47 | 1.53 | 0.60 | 2.21 | 1.10 | 1.24 | 1.09 | 1.85 | 1.96 | 1.33 | 0.72 | 0.33 | 0.92 | |||||||||||||
| MAX | 0.75 | 0.96 | 0.80 | 1.92 | 1.53 | 2.04 | 0.91 | 1.30 | 2.05 | 1.51 | 1.00 | 0.73 | 2.05 | |||||||||||||
| MIN | 0.03 | 0.05 | 0.07 | 0.11 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.08 | 0.00 | 0.03 | 0.46 | |||||||||||||
| YRS | 42 | 44 | 46 | 44 | 45 | 43 | 46 | 44 | 44 | 38 | 42 | 43 | 27 | |||||||||||||