| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1895 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | 0.42 | 0.14 | 1.20 | 0.00 | z | 0.35 | 0.59 | 2.70 | |||||||
| 1896 | 3.44 | 0.86 | 0.95 | 1.85 | m | 2.47 | 0.24 | 0.70 | 0.57 | 0.30 | 0.55 | 1.43 | 1.52 | a | 13.03 | |||||||||||
| 1897 | 1.23 | 2.05 | 1.61 | 0.94 | 0.96 | 1.32 | 0.00 | 0.10 | 0.93 | 0.28 | 2.63 | 1.69 | 13.74 | |||||||||||||
| 1898 | 1.23 | 0.52 | 0.58 | 0.38 | 2.28 | 0.79 | 0.05 | 0.14 | 0.16 | 1.16 | 1.01 | 1.09 | 9.39 | |||||||||||||
| 1899 | 2.49 | r | 2.02 | q | 2.20 | 1.51 | r | 1.30 | 0.11 | 0.12 | 1.24 | 0.32 | 1.80 | 1.30 | 1.08 | x | 8.39 | |||||||||
| 1900 | 1.34 | 0.99 | 1.26 | r | 1.65 | 1.15 | 0.80 | 0.41 | 0.92 | 1.36 | 2.76 | 0.74 | 1.09 | 13.21 | ||||||||||||
| 1901 | 1.33 | 1.33 | 0.92 | v | 0.87 | 0.48 | 0.79 | 0.17 | 0.17 | 1.54 | 0.46 | 0.64 | t | 1.59 | s | 7.14 | ||||||||||
| 1902 | 0.44 | w | 2.75 | 1.19 | 1.39 | 1.82 | 0.44 | 0.69 | 0.24 | 0.26 | 0.40 | 2.05 | 2.32 | 13.55 | ||||||||||||
| 1903 | 0.76 | 0.64 | 1.16 | 0.34 | 1.00 | 0.94 | 0.13 | x | 0.36 | 0.42 | 0.56 | 3.44 | 0.87 | 10.49 | ||||||||||||
| 1904 | 0.62 | 2.11 | i | 3.11 | k | 1.26 | 0.81 | 0.46 | 1.31 | 0.06 | z | 2.03 | 0.89 | 0.18 | 1.50 | 9.06 | ||||||||||
| 1905 | 1.90 | 0.31 | 1.39 | 1.05 | q | 1.39 | 1.70 | 0.24 | 0.00 | 0.73 | 0.73 | 1.14 | 0.94 | 10.47 | ||||||||||||
| 1906 | 2.04 | 1.40 | 1.57 | 0.60 | 1.85 | 1.43 | 0.08 | 0.71 | 0.62 | 0.25 | 0.90 | 1.57 | 13.02 | |||||||||||||
| 1907 | 0.96 | 2.12 | 1.56 | 0.47 | 0.92 | 1.09 | a | 0.54 | 0.31 | z | 0.47 | z | 0.57 | 0.55 | r | 2.49 | 10.72 | |||||||||
| 1908 | 0.58 | a | 0.66 | 0.29 | 1.36 | 1.14 | 0.56 | 0.00 | 0.28 | 0.49 | 1.42 | 0.44 | 0.43 | y | 7.22 | |||||||||||
| 1909 | 2.48 | 0.73 | 0.66 | 0.08 | 0.89 | 0.54 | 1.12 | 0.00 | z | 0.79 | 0.44 | 0.68 | o | 1.09 | 8.82 | |||||||||||
| 1910 | 0.29 | 1.53 | n | 0.80 | 0.33 | a | 0.82 | a | 0.42 | 0.12 | 0.01 | 0.54 | 0.64 | 2.57 | n | 0.57 | 4.54 | |||||||||
| 1911 | 0.88 | d | 0.89 | a | 0.12 | 0.13 | b | 0.99 | c | 1.42 | s | 0.14 | a | 0.00 | 0.95 | 0.60 | 0.98 | 0.38 | a | 6.06 | ||||||
| 1912 | 1.90 | 0.39 | 0.58 | a | 3.22 | 2.41 | 1.62 | 0.54 | u | 2.33 | 0.20 | 0.45 | 0.59 | 1.46 | a | 15.15 | ||||||||||
| 1913 | 1.36 | a | 0.14 | 0.64 | a | 1.46 | 1.14 | a | 3.09 | 0.43 | a | 1.04 | a | 0.01 | b | 0.55 | a | 1.46 | 1.35 | b | 12.67 | |||||
| 1914 | 2.36 | a | 1.20 | 0.66 | 1.43 | 1.09 | 2.33 | a | 0.73 | 0.00 | 1.00 | 0.89 | 0.17 | 0.49 | a | 12.35 | ||||||||||
| 1915 | 1.40 | 2.08 | m | 1.07 | 1.18 | t | 1.51 | 0.74 | 2.22 | 0.06 | a | 0.49 | 0.27 | 1.45 | 1.24 | a | 10.45 | |||||||||
| 1916 | 2.03 | 1.15 | 1.01 | 0.95 | a | 2.07 | 1.08 | 1.27 | 0.23 | 0.13 | 0.25 | a | 1.80 | t | 1.34 | r | 10.17 | |||||||||
| 1917 | 0.91 | a | 1.43 | 1.10 | j | 1.83 | 2.47 | o | 0.24 | 0.00 | 0.00 | 1.13 | v | 0.00 | 1.40 | 1.35 | p | 5.81 | ||||||||
| 1918 | 1.51 | a | 0.65 | 0.35 | 0.18 | 0.42 | 0.54 | z | 0.57 | 0.96 | 0.48 | 0.82 | 0.92 | 0.34 | 7.20 | |||||||||||
| 1919 | 1.21 | 1.89 | h | 0.95 | a | 1.21 | a | 0.18 | a | 0.31 | 0.00 | 0.31 | 0.64 | 1.29 | 1.23 | s | 1.64 | 7.74 | ||||||||
| 1920 | 0.16 | 0.17 | 0.86 | 1.93 | 0.88 | 1.15 | 0.09 | 1.27 | 0.65 | 0.88 | 0.89 | 1.89 | 10.82 | |||||||||||||
| 1921 | 1.46 | 1.27 | 0.48 | 0.85 | o | 2.18 | 0.79 | 0.00 | 0.54 | 0.41 | 0.40 | 1.84 | 0.64 | 10.01 | ||||||||||||
| 1922 | 0.47 | 0.99 | 1.10 | 0.82 | 0.64 | 1.40 | 0.00 | 0.66 | 0.05 | 1.23 | 1.22 | 1.83 | 10.41 | |||||||||||||
| 1923 | 0.39 | 0.15 | 0.21 | 2.00 | 0.91 | 1.64 | 2.80 | 0.41 | 0.21 | 2.55 | 0.42 | 1.11 | q | 11.69 | ||||||||||||
| 1924 | 0.39 | 1.46 | 0.51 | 0.61 | 0.03 | 0.81 | 0.01 | 0.52 | 0.45 | 1.94 | 1.21 | 1.45 | q | 7.94 | ||||||||||||
| 1925 | 1.29 | q | 1.79 | 0.35 | 2.21 | 1.81 | 2.40 | 0.00 | 0.51 | 1.34 | 0.21 | 0.69 | 1.09 | 12.40 | ||||||||||||
| 1926 | 0.89 | 1.77 | 0.94 | 1.12 | 1.27 | 0.14 | 0.17 | 1.15 | 0.12 | 0.48 | 2.34 | 1.57 | 11.96 | |||||||||||||
| 1927 | 1.25 | 1.38 | 0.98 | 0.63 | 1.45 | 2.72 | 0.00 | 0.15 | 2.46 | 1.19 | 1.81 | 0.38 | 14.40 | |||||||||||||
| 1928 | 1.82 | v | 0.66 | 1.01 | 0.96 | 0.01 | 1.63 | 0.06 | 0.00 | 0.40 | 0.46 | 1.19 | 0.67 | 7.05 | ||||||||||||
| 1929 | 1.21 | 0.08 | 0.69 | 0.88 | 0.63 | 1.53 | 0.00 | 0.09 | 0.57 | 0.17 | 0.21 | 3.31 | 9.37 | |||||||||||||
| 1930 | 0.69 | b | 0.43 | b | 0.30 | 0.64 | a | 1.58 | 1.41 | 0.00 | 0.06 | 0.58 | 0.74 | 0.36 | 0.87 | 7.66 | ||||||||||
| 1931 | 0.84 | 0.76 | 1.45 | 0.57 | 0.43 | 1.70 | 0.00 | 0.00 | 0.43 | 0.90 | 0.39 | 1.77 | 9.24 | |||||||||||||
| 1932 | 1.69 | 0.71 | a | 2.24 | 0.76 | a | 1.47 | 0.49 | 0.00 | 0.25 | 0.00 | 0.11 | a | 0.78 | 0.51 | v | 8.50 | |||||||||
| 1933 | 0.42 | t | 1.20 | 0.93 | v | 0.81 | 1.34 | 0.58 | 0.03 | 0.50 | 0.74 | 0.24 | 0.52 | 1.50 | 7.46 | |||||||||||
| 1934 | 0.50 | 0.57 | 0.48 | 0.24 | w | 1.09 | 3.42 | 0.00 | 0.20 | 0.40 | 1.09 | 1.17 | 0.98 | 9.90 | ||||||||||||
| 1935 | 0.70 | 0.26 | x | 0.00 | z | 2.06 | 0.55 | 1.21 | 0.85 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 5.37 | ||||||
| 1936 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| 1937 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| 1938 | 0.00 | z | 0.00 | z | 0.00 | z | 0.56 | 0.02 | 1.88 | 0.36 | 0.00 | 0.10 | a | 0.46 | v | 2.00 | 0.85 | 5.77 | ||||||||
| 1939 | 0.20 | f | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| 1940 | 0.25 | y | 2.78 | 1.91 | 1.52 | 0.30 | 0.35 | 1.53 | 0.00 | 2.33 | 1.28 | 1.41 | 1.90 | 15.31 | ||||||||||||
| 1941 | 1.20 | 1.29 | 0.38 | 0.86 | 2.49 | 2.14 | 2.02 | 2.32 | 0.92 | 1.41 | 1.02 | 1.30 | 17.35 | |||||||||||||
| 1942 | 1.39 | 1.67 | a | 0.43 | 0.95 | 2.78 | 1.39 | 0.27 | 0.05 | 0.05 | 0.35 | 1.87 | 1.52 | 12.72 | ||||||||||||
| 1943 | 1.76 | 0.22 | 1.07 | 1.86 | 0.40 | 1.08 | 0.42 | 0.36 | 0.00 | 1.67 | 0.39 | 0.41 | 9.64 | |||||||||||||
| 1944 | 0.35 | 1.14 | 0.28 | 0.92 | 0.46 | 2.34 | 0.08 | 0.01 | 0.41 | 0.43 | 0.65 | 1.02 | 8.09 | |||||||||||||
| 1945 | 0.65 | 1.10 | 0.78 | 1.13 | 2.12 | 0.33 | 0.00 | 0.40 | 0.55 | 0.71 | 1.79 | 1.75 | 11.31 | |||||||||||||
| 1946 | 0.82 | 0.69 | 0.79 | 0.26 | 1.11 | 0.73 | 0.61 | 0.48 | 0.96 | 1.22 | 1.41 | 0.49 | 9.57 | |||||||||||||
| 1947 | 0.27 | 0.43 | 0.00 | z | 0.92 | 1.05 | 1.92 | 0.17 | 1.18 | 0.74 | 1.70 | 1.91 | 1.14 | 11.43 | ||||||||||||
| 1948 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.04 | 1.09 | 0.63 | 0.47 | a | 1.18 | 1.22 | 5.63 | ||||||
| 1949 | 0.43 | 0.67 | 0.78 | 0.26 | 1.36 | 0.00 | a | 0.02 | 0.00 | a | 0.55 | 0.40 | 1.33 | 0.60 | 6.40 | |||||||||||
| 1950 | 1.18 | a | 0.41 | a | 1.03 | 0.71 | 0.44 | 2.26 | 0.04 | 0.05 | 0.08 | 1.68 | a | 1.27 | 1.53 | 10.68 | ||||||||||
| 1951 | 1.20 | 0.63 | 0.92 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | a | 0.02 | 0.13 | 0.63 | 1.60 | b | 1.48 | 6.61 | ||||||||
| 1952 | 0.68 | 1.88 | 1.52 | 0.81 | 1.69 | 3.19 | 0.00 | 1.66 | 0.39 | 0.00 | 0.25 | 1.99 | 14.06 | |||||||||||||
| 1953 | 2.51 | 1.95 | 1.66 | 1.59 | 2.52 | 1.12 | 0.00 | 1.47 | a | 0.00 | 1.07 | 0.92 | 1.43 | 16.24 | ||||||||||||
| 1954 | 1.21 | 0.58 | 1.31 | 0.82 | 1.01 | 1.22 | 0.00 | 0.45 | 0.58 | 0.36 | 0.78 | 0.65 | 8.97 | |||||||||||||
| 1955 | 0.68 | 0.33 | 0.56 | 1.50 | 1.39 | 0.34 | 0.41 | 0.00 | 0.58 | 0.52 | i | 1.12 | 2.73 | 9.64 | ||||||||||||
| 1956 | 2.22 | 1.34 | 0.34 | 0.31 | 3.17 | 1.18 | 1.46 | 0.60 | 0.00 | 1.50 | 0.24 | 0.51 | 12.87 | |||||||||||||
| 1957 | 0.68 | 0.61 | 1.98 | a | 1.76 | 3.68 | 0.69 | 0.20 | 0.11 | a | 0.32 | 3.11 | 0.52 | 2.49 | 16.15 | |||||||||||
| 1958 | 2.54 | 2.01 | 1.76 | 1.07 | a | 2.52 | 2.02 | 1.38 | 0.14 | 0.50 | 0.40 | 0.90 | 2.43 | 17.67 | ||||||||||||
| 1959 | 1.81 | 1.42 | 0.82 | 0.82 | 1.39 | 0.73 | 0.15 | 0.37 | 1.57 | 0.43 | 0.22 | 0.94 | 10.67 | |||||||||||||
| 1960 | 1.31 | 0.86 | 1.58 | 0.56 | 2.76 | 0.05 | 0.10 | 0.88 | 0.00 | 0.45 | 1.96 | 0.72 | 11.23 | |||||||||||||
| 1961 | 0.30 | 1.08 | 1.98 | 0.19 | 2.25 | 0.94 | 0.35 | 0.44 | 0.19 | 0.60 | 1.48 | 0.63 | 10.43 | |||||||||||||
| 1962 | 0.94 | 1.15 | 1.17 | 1.39 | 2.56 | 0.20 | 0.00 | 0.14 | 0.68 | 2.26 | 1.42 | 0.92 | 12.83 | |||||||||||||
| 1963 | 1.14 | 1.17 | 0.86 | 2.70 | 1.52 | 0.69 | 0.47 | 0.26 | 0.97 | 0.47 | 1.17 | 0.62 | 12.04 | |||||||||||||
| 1964 | 1.32 | 0.07 | 0.24 | 0.27 | 0.29 | 2.25 | 0.57 | 0.08 | 0.13 | 0.71 | 1.40 | 3.58 | 10.91 | |||||||||||||
| 1965 | 2.79 | 0.29 | 0.23 | 0.76 | 0.27 | 1.52 | 0.54 | 2.00 | 0.00 | 0.03 | 1.22 | 0.37 | 10.02 | |||||||||||||
| 1966 | 1.39 | 0.80 | 0.80 | 0.36 | 0.72 | 1.83 | 1.37 | 0.09 | 1.53 | 0.59 | 2.65 | 1.45 | 13.58 | |||||||||||||
| 1967 | 0.96 | 0.24 | 1.27 | 1.78 | 1.61 | 0.84 | 0.00 | 0.23 | 0.19 | 1.31 | 0.53 | 0.72 | 9.68 | |||||||||||||
| 1968 | 0.72 | 0.69 | 0.28 | 0.62 | 1.00 | 0.81 | 0.06 | 1.52 | 0.10 | 1.07 | 2.11 | 1.74 | 10.72 | |||||||||||||
| 1969 | 1.58 | 0.99 | 0.33 | 2.22 | 1.12 | 3.87 | 0.03 | 0.00 | 0.66 | 1.00 | 0.30 | 1.98 | 14.08 | |||||||||||||
| 1970 | 3.27 | 1.04 | 0.74 | 0.41 | 1.55 | 2.21 | 0.12 | 0.67 | 0.81 | 1.30 | 1.81 | 1.15 | 15.08 | |||||||||||||
| 1971 | 1.80 | 0.19 | 0.78 | 0.97 | 1.38 | 0.84 | 0.65 | 0.18 | 0.85 | 0.92 | 1.19 | 1.17 | 10.92 | |||||||||||||
| 1972 | 0.65 | 0.23 | 1.09 | 0.85 | 2.14 | 0.46 | 0.03 | 0.07 | 0.45 | 0.31 | 0.91 | 1.00 | 8.19 | |||||||||||||
| 1973 | 0.00 | z | 0.57 | 0.46 | 0.36 | 1.66 | 0.06 | 0.29 | 0.38 | 0.86 | 0.90 | 0.00 | z | 0.00 | z | 5.54 | ||||||||||
| 1974 | 1.62 | 0.85 | 1.68 | 0.00 | z | 0.23 | 0.23 | 0.49 | 0.11 | 0.00 | 0.34 | 0.62 | 1.60 | 7.77 | ||||||||||||
| 1975 | 0.95 | 1.12 | 1.14 | 0.75 | 0.22 | 0.31 | 1.86 | 0.62 | 0.00 | 0.00 | z | 0.00 | z | 1.36 | 8.33 | |||||||||||
| 1976 | 0.93 | 0.71 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.09 | 0.57 | 0.00 | z | 0.23 | 3.53 | ||||||
| 1977 | 0.42 | 0.62 | 0.79 | 0.25 | 2.72 | 1.12 | 0.85 | 0.81 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 7.58 | |||||||||
| 1978 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.86 | 0.00 | z | 0.00 | z | 0.00 | z | 0.86 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.23 | 0.95 | 0.94 | 1.00 | 1.32 | 1.16 | 0.43 | 0.47 | 0.59 | 0.84 | 1.15 | 1.28 | 11.68 | |||||||||||||
| S.D. | 0.72 | 0.61 | 0.53 | 0.65 | 0.82 | 0.87 | 0.59 | 0.55 | 0.53 | 0.64 | 0.67 | 0.70 | 2.64 | |||||||||||||
| SKEW | 0.97 | 0.89 | 0.60 | 1.00 | 0.53 | 0.95 | 1.86 | 1.63 | 1.44 | 1.40 | 0.78 | 0.98 | 0.42 | |||||||||||||
| MAX | 3.44 | 2.78 | 2.24 | 3.22 | 3.68 | 3.87 | 2.80 | 2.33 | 2.46 | 3.11 | 3.44 | 3.58 | 17.67 | |||||||||||||
| MIN | 0.16 | 0.07 | 0.12 | 0.08 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.23 | 6.40 | |||||||||||||
| NO YRS | 70 | 71 | 69 | 69 | 75 | 75 | 77 | 75 | 77 | 74 | 69 | 69 | 40 | |||||||||||||