| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1900 | 0.27 | 0.40 | 0.08 | 0.70 | 0.44 | 0.10 | 0.02 | 0.15 | 0.85 | 0.40 | 0.67 | 0.00 | 0.85 | |||||||||||||
| 1901 | 0.27 | 0.33 | 0.02 | 0.40 | 0.70 | 0.30 | 0.40 | d | 0.60 | 0.20 | 0.49 | 0.00 | 0.10 | 0.70 | ||||||||||||
| 1902 | 0.33 | 0.44 | 0.17 | 0.18 | 0.50 | i | 0.13 | a | 0.26 | 1.15 | 0.83 | 0.41 | 0.51 | 1.10 | 1.15 | |||||||||||
| 1903 | 0.28 | 0.50 | 1.01 | 0.82 | 0.42 | 0.55 | 1.40 | b | 0.85 | 0.45 | 0.08 | 0.00 | 0.04 | 1.40 | ||||||||||||
| 1904 | 0.09 | 0.11 | 0.62 | 0.32 | 0.47 | 0.15 | 0.15 | 0.80 | 1.04 | 1.75 | 0.00 | 0.30 | 1.75 | |||||||||||||
| 1905 | 1.02 | 0.64 | 0.85 | 1.38 | 0.37 | 0.60 | 0.33 | h | 0.28 | 1.14 | 0.09 | 1.02 | 0.39 | 1.38 | ||||||||||||
| 1906 | 0.15 | h | 0.14 | 1.05 | 0.54 | 0.44 | 0.07 | 0.75 | 0.41 | 0.81 | 0.62 | 1.00 | 0.76 | 1.05 | ||||||||||||
| 1907 | 0.46 | 0.42 | 0.80 | 0.71 | 0.58 | 1.00 | 0.79 | 0.79 | 0.45 | 0.26 | 0.49 | 0.82 | 1.00 | |||||||||||||
| 1908 | 0.30 | 0.63 | h | 0.50 | 0.40 | 0.54 | 0.15 | 1.12 | 0.79 | d | 0.49 | a | 0.22 | j | 0.52 | 1.17 | 1.17 | |||||||||
| 1909 | 0.58 | 0.79 | 0.50 | d | 0.26 | 0.24 | d | 0.22 | d | 0.57 | 0.78 | 1.64 | 0.16 | f | 0.70 | 0.88 | 1.64 | |||||||||
| 1910 | 0.35 | g | 0.39 | 0.14 | j | 0.18 | 0.04 | 0.00 | h | 0.28 | 0.45 | 0.12 | 0.65 | g | 0.75 | b | 0.28 | h | 0.75 | |||||||
| 1911 | 0.91 | a | 1.60 | 1.18 | h | 0.37 | c | 0.46 | e | 0.47 | 0.67 | 1.31 | a | 0.78 | n | 2.26 | 0.45 | 0.30 | h | 2.26 | ||||||
| 1912 | 0.07 | r | 0.26 | 0.86 | 0.38 | 0.03 | 0.26 | 1.67 | 0.66 | 0.02 | a | 0.73 | 0.15 | 0.17 | 1.67 | |||||||||||
| 1913 | 0.40 | 0.82 | 0.75 | 0.21 | 0.67 | 0.96 | 0.68 | a | 0.42 | 0.63 | 0.81 | 1.02 | 0.78 | 1.02 | ||||||||||||
| 1914 | 0.91 | 0.48 | c | 0.40 | 0.28 | 1.00 | 1.05 | 0.97 | 0.46 | 0.17 | 1.28 | a | 0.00 | 0.67 | 1.28 | |||||||||||
| 1915 | 0.75 | 1.04 | 0.24 | 0.62 | 0.30 | a | 0.46 | 1.42 | b | 0.56 | 1.78 | f | 0.00 | 0.60 | 0.54 | 1.78 | ||||||||||
| 1916 | 2.02 | 0.58 | 0.94 | 1.00 | d | 0.14 | 0.00 | 0.86 | a | 2.04 | 0.28 | f | 1.44 | f | 0.20 | 0.94 | 2.04 | |||||||||
| 1917 | 1.02 | b | 0.56 | 0.38 | 1.16 | 0.92 | e | 0.00 | c | 1.44 | 0.37 | 0.35 | 0.12 | 0.06 | 0.00 | 1.44 | ||||||||||
| 1918 | 0.68 | 0.63 | b | 1.17 | e | 0.42 | 0.00 | 0.02 | e | 0.73 | 0.32 | d | 0.71 | 0.84 | 0.81 | 0.49 | 1.17 | |||||||||
| 1919 | 0.17 | 0.57 | 1.28 | 0.62 | 0.38 | 0.66 | d | 0.51 | g | 0.63 | d | 1.17 | 0.73 | 1.28 | 0.73 | 1.28 | ||||||||||
| 1920 | 1.46 | 0.93 | 0.61 | 0.67 | 0.78 | 0.91 | 0.29 | 0.13 | 0.33 | 1.06 | 0.88 | f | 0.32 | h | 1.46 | |||||||||||
| 1921 | 0.55 | 0.39 | 0.38 | 0.53 | 0.48 | 1.29 | 0.64 | 1.17 | 0.37 | 0.88 | f | 1.01 | 1.50 | 1.50 | ||||||||||||
| 1922 | 0.46 | 0.47 | 1.74 | d | 0.70 | 0.81 | 0.40 | 9999.00 | z | 0.94 | 0.04 | 9999.00 | z | 0.86 | h | 1.21 | 1.74 | |||||||||
| 1923 | 1.01 | 0.26 | 0.29 | 0.56 | 0.89 | d | 0.00 | 0.76 | 0.91 | 1.01 | 0.38 | b | 1.00 | e | 0.90 | 1.01 | ||||||||||
| 1924 | 0.40 | 0.12 | 0.48 | a | 0.92 | 0.07 | 0.34 | 0.80 | c | 0.66 | 0.46 | 0.30 | 0.20 | 0.70 | 0.92 | |||||||||||
| 1925 | 0.11 | 0.46 | 0.47 | h | 0.39 | 0.16 | 0.47 | 0.75 | f | 0.79 | 0.90 | 1.22 | 0.58 | 0.46 | 1.22 | |||||||||||
| 1926 | 0.90 | 0.22 | 0.49 | b | 0.98 | 0.70 | f | 0.32 | 0.98 | 0.58 | 0.71 | e | 0.32 | 0.42 | 0.63 | 0.98 | ||||||||||
| 1927 | 0.26 | f | 0.80 | 0.68 | 0.32 | 0.62 | d | 2.68 | 0.47 | 0.26 | a | 1.12 | h | 0.65 | e | 0.68 | 0.48 | 2.68 | ||||||||
| 1928 | 0.34 | 1.06 | 0.56 | e | 0.10 | j | 0.38 | g | 0.00 | 0.60 | 0.52 | 0.08 | 2.52 | 0.78 | 0.84 | b | 2.52 | |||||||||
| 1929 | 0.65 | 0.58 | 0.24 | 1.28 | 0.53 | 0.02 | 1.46 | 2.14 | 0.68 | 0.14 | 0.14 | h | 0.08 | i | 2.14 | |||||||||||
| 1930 | 0.52 | h | 0.53 | 0.32 | 0.76 | 0.58 | 0.09 | 2.30 | 0.54 | 0.34 | 0.28 | 0.37 | a | 0.00 | 2.30 | |||||||||||
| 1931 | 0.07 | 0.18 | 0.21 | 0.56 | 0.38 | 0.60 | 1.23 | 0.34 | 0.32 | 0.66 | i | 0.62 | 0.32 | 1.23 | ||||||||||||
| 1932 | 0.12 | 0.30 | 0.28 | 0.42 | 0.35 | 0.28 | 0.35 | 1.74 | a | 0.84 | 0.70 | 0.00 | 0.48 | 1.74 | ||||||||||||
| 1933 | 0.28 | 0.09 | 0.46 | 0.43 | 0.12 | 0.22 | 0.62 | 0.30 | 1.45 | 0.70 | 0.48 | 0.28 | 1.45 | |||||||||||||
| 1934 | 0.08 | i | 0.54 | g | 0.00 | 0.10 | 0.78 | 0.35 | 0.63 | 0.59 | 1.02 | h | 0.22 | 0.54 | 0.42 | 1.02 | ||||||||||
| 1935 | 0.52 | 0.36 | 0.66 | 1.00 | 0.70 | 0.35 | 0.84 | 1.36 | 1.00 | 0.50 | 0.38 | 0.04 | 1.36 | |||||||||||||
| 1936 | 0.04 | 0.38 | 0.38 | 0.08 | 0.18 | 0.30 | 0.64 | 2.30 | 0.60 | 1.16 | 0.46 | 0.38 | 2.30 | |||||||||||||
| 1937 | 0.24 | 1.27 | 1.02 | 0.02 | 0.23 | 0.35 | 0.96 | 0.35 | 1.01 | 0.55 | 0.39 | 0.63 | 1.27 | |||||||||||||
| 1938 | 0.77 | 0.84 | 1.73 | 0.43 | 0.44 | 0.55 | 0.44 | 0.28 | 0.85 | 0.37 | 0.14 | 0.43 | 1.73 | |||||||||||||
| 1939 | 0.49 | 0.43 | 0.23 | 0.48 | 0.11 | 0.11 | 0.16 | 0.55 | 0.90 | 0.65 | 0.43 | 0.33 | 0.90 | |||||||||||||
| 1940 | 0.60 | 0.82 | 0.40 | 0.24 | 0.30 | 0.62 | 0.42 | 0.94 | 0.74 | 0.55 | 0.77 | 0.61 | 0.94 | |||||||||||||
| 1941 | 0.50 | d | 0.89 | 0.84 | 0.80 | 0.59 | 0.68 | 0.22 | 0.57 | 0.80 | 1.24 | 0.19 | 0.36 | 1.24 | ||||||||||||
| 1942 | 0.18 | 0.41 | 0.37 | 0.72 | 0.12 | 0.05 | 1.64 | 0.55 | 0.35 | 0.34 | h | 0.05 | 1.05 | 1.64 | ||||||||||||
| 1943 | 1.36 | 0.22 | 0.78 | 0.23 | 0.85 | d | 0.46 | 0.38 | 0.53 | 0.48 | 0.72 | 0.25 | 0.96 | 1.36 | ||||||||||||
| 1944 | 0.97 | a | 0.44 | 0.28 | 0.49 | 0.58 | 0.21 | 0.65 | 0.20 | 0.66 | 0.40 | 0.34 | 0.51 | 0.97 | ||||||||||||
| 1945 | 0.49 | 0.19 | 0.55 | 0.33 | 0.00 | 0.10 | 0.15 | 0.30 | c | 0.41 | 0.55 | 0.05 | 0.40 | i | 0.55 | |||||||||||
| 1946 | 0.14 | 0.17 | 0.31 | 0.39 | 0.68 | 0.12 | 1.08 | 0.73 | 0.89 | 0.77 | 0.66 | 0.38 | 1.08 | |||||||||||||
| 1947 | 0.12 | a | 0.45 | 0.39 | 0.27 | 1.18 | 0.91 | 0.41 | 1.32 | 0.35 | 0.87 | 0.74 | 0.62 | e | 1.32 | |||||||||||
| 1948 | 0.09 | 0.61 | 0.44 | 0.20 | 0.51 | 0.84 | 0.31 | 1.25 | 0.43 | 1.36 | 0.03 | 0.69 | 1.36 | |||||||||||||
| 1949 | 0.71 | 0.34 | 0.48 | 0.60 | 0.84 | 1.63 | 0.51 | 0.55 | 0.73 | 0.40 | 0.34 | 0.33 | 1.63 | |||||||||||||
| 1950 | 0.32 | 0.60 | 0.28 | 0.25 | 0.00 | a | 0.71 | 0.57 | 0.55 | 0.93 | 0.09 | 0.82 | 0.37 | 0.93 | ||||||||||||
| 1951 | 0.64 | 0.27 | 0.38 | 0.35 | 0.14 | 0.00 | 0.21 | 0.34 | 0.41 | 1.02 | 0.57 | 1.67 | 1.67 | |||||||||||||
| 1952 | 1.22 | 0.12 | 0.39 | 1.44 | 0.15 | 1.05 | 0.83 | 1.02 | 0.70 | 0.00 | 0.84 | 0.65 | 1.44 | |||||||||||||
| 1953 | 0.67 | 0.19 | 0.52 | 1.00 | 0.36 | 0.50 | 0.53 | 0.74 | 0.00 | 2.00 | 0.93 | 0.64 | 2.00 | |||||||||||||
| 1954 | 0.32 | 0.15 | 0.75 | 0.31 | 0.70 | 0.30 | 1.89 | 0.43 | 0.87 | 0.42 | 0.23 | 0.35 | 1.89 | |||||||||||||
| 1955 | 0.54 | 0.79 | 0.00 | 0.55 | 1.88 | 0.13 | 1.00 | 0.80 | 0.47 | 0.00 | 0.44 | 0.82 | 1.88 | |||||||||||||
| 1956 | 0.82 | 0.16 | 0.51 | 0.47 | 0.02 | 0.09 | 0.30 | 0.33 | 0.06 | 0.75 | 0.29 | 0.28 | 0.82 | |||||||||||||
| 1957 | 1.26 | 0.32 | 0.40 | 0.84 | 0.74 | 0.28 | 1.50 | 0.98 | 0.07 | 1.12 | 0.80 | 0.49 | 1.50 | |||||||||||||
| 1958 | 0.33 | b | 0.70 | 0.72 | 0.33 | 0.08 | 0.36 | 0.28 | 0.60 | A | 1.07 | 0.81 | 0.24 | 0.13 | 1.07 | |||||||||||
| 1959 | 0.09 | 0.62 | 0.12 | 0.78 | 0.33 | 0.26 | 0.59 | g | 1.93 | 0.43 | 1.46 | 0.21 | 1.49 | 1.93 | ||||||||||||
| 1960 | 0.46 | 0.75 | 0.31 | 0.63 | 0.41 | 0.47 | 0.32 | 0.16 | 0.41 | 1.02 | 0.42 | 0.84 | 1.02 | |||||||||||||
| 1961 | 0.60 | 0.25 | 0.71 | 0.72 | 0.22 | 0.04 | 0.58 | A | 0.79 | 0.83 | 1.49 | 0.24 | 0.42 | 1.49 | ||||||||||||
| 1962 | 0.36 | 0.57 | 0.40 | 0.11 | 0.70 | 0.44 | 0.23 | 0.20 | 0.85 | 0.92 | 0.45 | 0.54 | 0.92 | |||||||||||||
| 1963 | 0.63 | 0.59 | 0.41 | 0.63 | 0.13 | 0.16 | 0.71 | 0.92 | 0.40 | 1.03 | 0.35 | 0.31 | 1.03 | |||||||||||||
| 1964 | 0.30 | 0.15 | 0.73 | 0.51 | 0.13 | 0.04 | 0.74 | 1.43 | 0.87 | 0.00 | 0.67 | 0.56 | 1.43 | |||||||||||||
| 1965 | 0.58 | 0.67 | 0.54 | 0.97 | 0.50 | 0.39 | 0.44 | 0.45 | 0.49 | 0.58 | 1.18 | 0.97 | 1.18 | |||||||||||||
| 1966 | 0.21 | 0.39 | 0.50 | 0.65 | 0.25 | 0.10 | 0.21 | 0.81 | 0.34 | 0.20 | 1.37 | 2.12 | 2.12 | |||||||||||||
| 1967 | 0.62 | 0.11 | 0.24 | 0.03 | 0.42 | 0.35 | 1.07 | 0.62 | 0.58 | 0.06 | 0.54 | 1.07 | 1.07 | |||||||||||||
| 1968 | 0.34 | 0.44 | 0.44 | 0.40 | 1.38 | 0.14 | 9999.00 | z | 0.27 | 0.09 | 0.78 | 0.39 | 0.43 | 1.38 | ||||||||||||
| 1969 | 0.96 | 0.63 | 0.28 | 0.09 | 0.37 | 0.52 | 0.92 | 0.37 | 0.72 | 1.16 | 0.57 | 0.35 | 1.16 | |||||||||||||
| 1970 | 0.16 | 0.09 | 0.55 | 0.16 | 0.03 | 0.91 | 1.00 | 1.35 | 2.62 | 0.50 | 0.69 | 0.57 | 2.62 | |||||||||||||
| 1971 | 0.32 | 0.40 | 9999.00 | z | 0.24 | 0.91 | 0.00 | 0.65 | 0.98 | A | 1.77 | 0.80 | 1.12 | 0.87 | 1.77 | |||||||||||
| 1972 | 0.22 | 0.00 | 0.23 | 0.26 | 0.19 | 0.60 | 0.30 | 1.10 | 0.45 | 3.65 | 0.93 | 1.02 | A | 3.65 | ||||||||||||
| 1973 | 0.66 | 0.44 | 0.80 | 0.56 | 0.33 | 0.54 | 0.30 | m | 1.10 | 0.72 | 0.20 | 0.29 | 0.28 | 1.10 | ||||||||||||
| 1974 | 0.82 | 0.12 | 0.25 | 0.66 | 0.00 | 0.00 | 0.61 | 0.43 | 0.65 | 1.20 | 0.33 | 0.38 | 1.20 | |||||||||||||
| 1975 | 0.36 | 0.51 | 0.62 | 0.86 | 0.40 | 0.13 | 0.52 | 0.38 | 0.79 | 0.26 | 0.95 | A | 0.71 | 0.86 | ||||||||||||
| 1976 | 0.09 | 0.99 | 0.33 | 0.46 | 1.05 | 0.07 | 0.34 | 0.70 | 0.90 | 0.20 | 0.01 | 0.05 | 1.05 | |||||||||||||
| 1977 | 0.53 | 0.09 | 0.04 | 0.22 | 0.37 | 0.07 | 1.04 | 0.59 | 0.74 | i | 0.55 | A | 0.86 | 0.11 | 1.04 | |||||||||||
| 1978 | 1.14 | 0.52 | 1.10 | 0.73 | 0.74 | 0.15 | 0.19 | 0.98 | 0.65 | 0.61 | 1.11 | 1.73 | 1.73 | |||||||||||||
| 1979 | 1.05 | 0.41 | 1.09 | 0.49 | 0.51 | 0.13 | 0.11 | 0.73 | 0.17 | 0.52 | 0.28 | 0.80 | 1.09 | |||||||||||||
| 1980 | 1.65 | 1.55 | 0.32 | 0.26 | 0.96 | 0.00 | 0.09 | 0.58 | 0.97 | 0.60 | 0.73 | 0.37 | 1.65 | |||||||||||||
| 1981 | 0.07 | 0.63 | 0.73 | 0.47 | 0.47 | 0.27 | 1.14 | 0.60 | 0.87 | A | 0.95 | 0.68 | 0.27 | 1.14 | ||||||||||||
| 1982 | 0.58 | 0.40 | 0.60 | 0.56 | A | 0.74 | 0.19 | 0.57 | 0.58 | 0.74 | 0.44 | 1.61 | 0.76 | 1.61 | ||||||||||||
| 1983 | 0.19 | 0.59 | 0.49 | 0.45 | 0.24 | A | 0.58 | 0.54 | 0.99 | 1.45 | 0.44 | 0.84 | 0.43 | 1.45 | ||||||||||||
| 1984 | 0.79 | 0.20 | 0.33 | 0.45 | 0.32 | 0.49 | 0.53 | 0.65 | 0.50 | 1.22 | 0.43 | 1.04 | 1.22 | |||||||||||||
| 1985 | 0.47 | 0.29 | 0.40 | 0.63 | 0.24 | 0.16 | 0.71 | 0.10 | 0.88 | 0.87 | 0.60 | 0.25 | 0.88 | |||||||||||||
| 1986 | 0.07 | 0.52 | 0.32 | 1.26 | 0.30 | 0.63 | 0.57 | 0.86 | 0.95 | 1.58 | 1.90 | 1.00 | 1.90 | |||||||||||||
| 1987 | 0.77 | 0.65 | 0.57 | 0.72 | 0.29 | 0.69 | 0.74 | 0.67 | 0.30 | c | 0.81 | 0.83 | 0.35 | 0.83 | ||||||||||||
| 1988 | 0.83 | 0.56 | 0.16 | 1.18 | 0.38 | 0.67 | 0.29 | 0.89 | 0.43 | 0.32 | A | 0.75 | 0.45 | 1.18 | ||||||||||||
| 1989 | 0.72 | 0.54 | 0.36 | 0.00 | 0.22 | 0.04 | 1.36 | 0.39 | 0.44 | 1.24 | 0.00 | 0.00 | 1.36 | |||||||||||||
| 1990 | 0.75 | 0.35 | 0.18 | 0.63 | 0.78 | 0.72 | 2.12 | A | 0.97 | 1.79 | 0.45 | 0.60 | 0.41 | 1.79 | ||||||||||||
| 1991 | 1.20 | 0.30 | 0.91 | 9999.00 | z | 9999.00 | z | 9999.00 | z | 9999.00 | z | 9999.00 | z | 9999.00 | z | 9999.00 | z | 9999.00 | z | 9999.00 | z | 1.20 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.57 | 0.48 | 0.53 | 0.54 | 0.46 | 0.40 | 0.71 | 0.73 | 0.68 | 0.74 | 0.56 | 0.60 | 1.38 | |||||||||||||
| S.D. | 0.39 | 0.30 | 0.34 | 0.32 | 0.34 | 0.41 | 0.47 | 0.44 | 0.44 | 0.60 | 0.38 | 0.41 | 0.51 | |||||||||||||
| SKEW | 1.06 | 1.24 | 1.28 | 0.74 | 1.19 | 2.46 | 1.15 | 1.40 | 1.40 | 1.92 | 0.74 | 1.11 | 1.87 | |||||||||||||
| MAX | 2.02 | 1.60 | 1.74 | 1.44 | 1.88 | 2.68 | 2.30 | 2.30 | 2.62 | 3.65 | 1.90 | 2.12 | 3.65 | |||||||||||||
| MIN | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.70 | |||||||||||||
| NO YRS | 86 | 90 | 88 | 90 | 88 | 90 | 84 | 91 | 85 | 83 | 88 | 86 | 58 | |||||||||||||