| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1911 | 0.00 | z | 0.00 | z | 0.00 | z | 0.02 | 0.90 | 0.63 | 0.00 | 0.17 | 1.54 | z | 1.14 | z | 0.73 | 0.61 | 3.06 | ||||||||
| 1912 | 2.45 | 0.88 | 0.76 | 0.75 | v | 1.54 | v | 0.60 | z | 0.75 | 0.64 | 0.34 | 0.20 | 0.32 | z | 1.02 | z | 6.02 | ||||||||
| 1913 | 0.79 | 0.38 | 0.07 | z | 0.71 | 1.35 | 1.27 | 0.15 | 0.00 | 0.17 | 0.11 | z | 0.49 | x | 0.00 | z | 4.82 | |||||||||
| 1914 | 1.91 | 0.75 | 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 | 2.66 | |||
| 1915 | 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 | |
| 1916 | 0.00 | z | 0.00 | z | 0.10 | 0.11 | 0.70 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.91 | ||||
| 1917 | 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 | |
| 1918 | 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 | |
| 1919 | 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 | |
| 1920 | 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 | |
| 1921 | 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 | |
| 1922 | 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 | |
| 1923 | 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 | |
| 1924 | 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 | |
| 1925 | 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 | |
| 1926 | 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 | |
| 1927 | 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 | |
| 1928 | 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 | |
| 1929 | 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 | |
| 1930 | 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 | |
| 1931 | 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 | |
| 1932 | 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 | |
| 1933 | 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 | |
| 1934 | 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 | |
| 1935 | 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 | |
| 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 | 0.00 | 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 | |
| 1939 | 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 | |
| 1940 | 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 | |
| 1941 | 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 | |
| 1942 | 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 | |
| 1943 | 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 | |
| 1944 | 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 | |
| 1945 | 0.00 | z | 0.00 | z | 0.00 | z | 0.01 | 2.02 | 0.00 | 0.00 | 0.00 | 0.16 | 0.09 | z | 1.59 | v | 0.00 | z | 2.19 | |||||||
| 1946 | 0.00 | z | 0.25 | z | 0.93 | p | 0.10 | 0.88 | 1.19 | 0.09 | 0.45 | 0.39 | 0.76 | 1.11 | 0.22 | 5.19 | ||||||||||
| 1947 | 0.39 | 1.05 | 0.95 | 0.44 | a | 0.44 | 1.35 | 1.12 | 0.38 | 0.45 | 1.94 | 1.88 | 0.19 | 10.58 | ||||||||||||
| 1948 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.21 | 0.00 | z | 0.64 | f | 2.12 | 3.33 | |||
| 1949 | 0.15 | 1.28 | i | 0.66 | 0.00 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.02 | n | 0.00 | z | 1.56 | 0.00 | z | 2.37 | |||||
| 1950 | 1.91 | 0.41 | 0.46 | 0.69 | 0.16 | 2.13 | 0.00 | 0.52 | 0.00 | z | 4.01 | 0.87 | 1.31 | 12.47 | ||||||||||||
| 1951 | 1.33 | 1.42 | 0.21 | 0.12 | 1.55 | 0.21 | 0.30 | 0.02 | 0.12 | 0.79 | 1.77 | 1.58 | 9.42 | |||||||||||||
| 1952 | 0.66 | 1.38 | 0.15 | 0.12 | 0.90 | 2.91 | 0.00 | 0.38 | 0.64 | 0.00 | 0.10 | 2.33 | 9.57 | |||||||||||||
| 1953 | 2.26 | 1.43 | 0.53 | 0.83 | 1.50 | 1.57 | 0.00 | 1.80 | 0.02 | 0.50 | 2.02 | 1.46 | 13.92 | |||||||||||||
| 1954 | 2.08 | 0.23 | 0.51 | 0.40 | 0.83 | 1.56 | 0.00 | 0.73 | 0.69 | 0.45 | 0.35 | 0.16 | 7.99 | |||||||||||||
| 1955 | 0.30 | 0.30 | 0.33 | 0.99 | a | 0.42 | 0.61 | 0.27 | 0.00 | 0.89 | 0.61 | 1.76 | 3.98 | 10.46 | ||||||||||||
| 1956 | 2.91 | 1.50 | 0.35 | 0.00 | 2.50 | 1.60 | 0.59 | 0.39 | 0.17 | 1.44 | 0.16 | 0.46 | 12.07 | |||||||||||||
| 1957 | 0.89 | 1.08 | 2.22 | 0.90 | 2.94 | 0.54 | 0.67 | 0.20 | 1.08 | 1.05 | 0.31 | 2.29 | 14.17 | |||||||||||||
| 1958 | 1.31 | 1.76 | 0.36 | 0.38 | 1.92 | 1.74 | 0.29 | 0.03 | 0.27 | 0.05 | 1.13 | 0.74 | 9.98 | |||||||||||||
| 1959 | 1.77 | 1.18 | 0.71 | 0.04 | 0.82 | 0.41 | 0.01 | 0.00 | 0.75 | 0.44 | 0.33 | 0.24 | 6.70 | |||||||||||||
| 1960 | 1.66 | 0.81 | 2.09 | 0.26 | 0.87 | 0.00 | 0.21 | 0.16 | 0.13 | 0.38 | 2.50 | 1.19 | 10.26 | |||||||||||||
| 1961 | 0.63 | 2.71 | 1.58 | 0.50 | 1.12 | 0.77 | 0.06 | 0.25 | 0.07 | 0.41 | 2.92 | 1.45 | 12.47 | |||||||||||||
| 1962 | 0.43 | 1.40 | 1.00 | 0.35 | 2.19 | 0.29 | b | 0.00 | 0.94 | 0.30 | 2.26 | 1.21 | 1.66 | 12.03 | ||||||||||||
| 1963 | 1.33 | 0.54 | 0.86 | 1.88 | 0.88 | 0.71 | 0.15 | 0.20 | 0.83 | 0.44 | 2.13 | 1.33 | 11.28 | |||||||||||||
| 1964 | 1.51 | 0.13 | 0.22 | 0.07 | 0.05 | 1.21 | 0.04 | 0.13 | 0.09 | 0.42 | 1.54 | 5.77 | 11.18 | |||||||||||||
| 1965 | 1.67 | 0.00 | 0.14 | 1.13 | 0.16 | a | 2.00 | 0.62 | 1.20 | 0.11 | 0.26 | 2.45 | 0.00 | e | 9.74 | |||||||||||
| 1966 | 1.65 | 0.42 | 0.38 | 0.13 | 0.16 | 0.33 | 1.75 | 0.00 | 0.83 | 0.36 | 2.91 | 1.76 | 10.68 | |||||||||||||
| 1967 | 1.52 | 0.12 | 0.60 | 1.78 | 0.21 | 0.82 | 0.00 | 0.03 | 0.03 | 0.59 | 0.55 | 0.24 | 6.49 | |||||||||||||
| 1968 | 0.91 | 1.35 | 0.00 | 0.33 | 1.22 | 0.21 | 0.22 | 1.51 | 0.40 | 0.00 | z | 1.26 | 1.79 | 9.20 | ||||||||||||
| 1969 | 1.38 | 0.30 | 0.60 | 0.15 | 1.43 | 3.54 | 0.00 | z | 0.00 | z | 0.57 | 0.83 | 0.24 | 1.79 | 10.83 | |||||||||||
| 1970 | 2.76 | 0.39 | 0.43 | 0.04 | 0.09 | 0.66 | 0.00 | 0.00 | 0.11 | 0.51 | 1.71 | 0.25 | c | 6.95 | ||||||||||||
| 1971 | 1.75 | 0.05 | 1.03 | 0.29 | 1.83 | 0.23 | 0.02 | 0.26 | 0.84 | 0.56 | 1.12 | 0.48 | 8.46 | |||||||||||||
| 1972 | 0.99 | 0.16 | 1.21 | 0.26 | 0.84 | 0.66 | 0.00 | 0.60 | 0.24 | 0.48 | 0.50 | 1.36 | 7.30 | |||||||||||||
| 1973 | 0.74 | 0.47 | 0.00 | z | 0.32 | 0.46 | 0.00 | 0.11 | 0.12 | 1.44 | 0.90 | 3.60 | 1.55 | 9.71 | ||||||||||||
| 1974 | 1.08 | 0.52 | 1.61 | 1.05 | 0.11 | 0.00 | 0.33 | 0.00 | 0.00 | 0.40 | 0.32 | 0.83 | 6.25 | |||||||||||||
| 1975 | 1.38 | 1.89 | 1.67 | 0.40 | 0.25 | 0.97 | 0.48 | 1.89 | 0.00 | 0.93 | 0.53 | 1.20 | 11.59 | |||||||||||||
| 1976 | 0.66 | 1.07 | 0.64 | 1.54 | 0.39 | 0.16 | 0.41 | 2.90 | 0.28 | 0.25 | 0.56 | 0.02 | 8.88 | |||||||||||||
| 1977 | 0.28 | 0.35 | 0.06 | 0.03 | 1.24 | 0.16 | 0.05 | 0.54 | 0.79 | 0.50 | 1.89 | 2.16 | 8.05 | |||||||||||||
| 1978 | 2.50 | 0.64 | 0.72 | 2.08 | 0.58 | 1.95 | 0.57 | 1.11 | 0.30 | 0.00 | 0.92 | 0.00 | z | 11.37 | ||||||||||||
| 1979 | 1.98 | 0.57 | 1.43 | 0.64 | 0.16 | 0.11 | 0.00 | 1.76 | 0.27 | 1.65 | 1.79 | 0.38 | 10.74 | |||||||||||||
| 1980 | 2.42 | 1.08 | 0.39 | 1.05 | 1.33 | 1.52 | 0.12 | 0.00 | 0.69 | 0.76 | 1.27 | 1.83 | 12.46 | |||||||||||||
| 1981 | 1.38 | 1.14 | 1.06 | 0.37 | 1.30 | 0.75 | 0.47 | 0.00 | 1.30 | 0.55 | 2.81 | 4.50 | 15.63 | |||||||||||||
| 1982 | 0.69 | 1.27 | 0.12 | a | 0.74 | 0.25 | 1.27 | 0.67 | 0.73 | 1.69 | 1.91 | 0.36 | 1.35 | 11.05 | ||||||||||||
| 1983 | 1.48 | 2.43 | 2.25 | 1.03 | 1.06 | 0.65 | h | 0.90 | 1.03 | 0.26 | 0.94 | 2.11 | 2.91 | a | 16.40 | |||||||||||
| 1984 | 0.30 | 1.59 | 1.61 | 0.93 | 0.45 | 1.20 | 0.03 | 0.11 | 0.16 | 1.27 | 4.97 | 0.51 | 13.13 | |||||||||||||
| 1985 | 0.11 | 0.45 | 0.34 | 0.18 | 0.95 | 0.26 | 0.12 | 0.04 | 0.57 | 0.55 | 1.01 | 1.55 | 6.13 | |||||||||||||
| 1986 | 1.96 | 3.00 | 0.60 | 0.10 | 0.47 | 0.11 | 0.59 | 0.03 | 1.43 | 0.62 | 1.30 | 0.51 | 10.72 | |||||||||||||
| 1987 | 1.28 | 1.30 | 0.90 | 0.31 | 0.63 | 0.33 | 2.64 | 0.20 | 0.06 | 0.00 | 0.59 | 2.91 | a | 11.15 | ||||||||||||
| 1988 | 1.45 | 0.14 | 0.61 | 1.00 | 0.16 | 1.18 | 0.00 | 0.00 | 0.18 | 0.00 | 3.20 | 0.26 | 8.18 | |||||||||||||
| 1989 | 1.18 | 0.42 | 2.16 | 1.42 | 0.96 | 0.22 | 0.26 | 0.80 | 0.11 | 0.23 | 0.22 | 0.27 | 8.25 | |||||||||||||
| 1990 | 2.29 | 0.04 | 0.70 | 0.42 | 1.78 | 0.32 | 0.53 | 0.98 | 0.05 | 0.51 | g | 0.22 | 0.36 | 7.69 | ||||||||||||
| 1991 | 0.35 | 0.26 | 1.33 | 0.33 | 1.47 | 1.93 | 0.26 | 1.21 | 0.00 | 0.54 | 1.93 | 0.71 | 10.32 | |||||||||||||
| 1992 | 0.30 | 0.92 | 0.38 | 1.73 | 0.46 | 0.74 | 0.82 | 0.34 | a | 0.23 | 1.81 | b | 0.82 | 1.82 | 10.37 | |||||||||||
| 1993 | 1.47 | 0.82 | 1.60 | 1.03 | a | 2.12 | 1.25 | 0.61 | 0.75 | 0.00 | 0.20 | 0.36 | a | 0.00 | z | 10.21 | ||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.32 | 0.89 | 0.82 | 0.58 | 0.95 | 0.91 | 0.35 | 0.52 | 0.44 | 0.75 | 1.37 | 1.36 | 10.12 | |||||||||||||
| S.D. | 0.73 | 0.70 | 0.62 | 0.55 | 0.70 | 0.79 | 0.49 | 0.63 | 0.44 | 0.74 | 1.05 | 1.21 | 2.31 | |||||||||||||
| SKEW | 0.17 | 1.06 | 0.86 | 1.05 | 0.79 | 1.14 | 2.66 | 1.66 | 1.15 | 2.31 | 1.11 | 1.57 | 0.14 | |||||||||||||
| MAX | 2.91 | 3.00 | 2.25 | 2.08 | 2.94 | 3.54 | 2.64 | 2.90 | 1.69 | 4.01 | 4.97 | 5.77 | 15.63 | |||||||||||||
| MIN | 0.11 | 0.00 | 0.00 | 0.00 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.00 | 6.13 | |||||||||||||
| NO YRS | 49 | 48 | 47 | 51 | 50 | 48 | 49 | 49 | 49 | 45 | 48 | 46 | 37 | |||||||||||||