YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.70 | 2.00 | c | 0.70 | 2.00 | ----- | z | ----- | z | 0.30 | ----- | z | ||||
1906 | 0.20 | 0.10 | 0.20 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||
1907 | 0.68 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.60 | ----- | z | 0.20 | ----- | z | ----- | z | ----- | z | ----- | z | |||
1908 | ----- | z | ----- | z | ----- | z | ----- | z | 0.40 | 2.00 | ----- | z | 0.80 | 0.15 | b | 0.30 | 1.00 | 0.10 | ----- | z | ||||||
1909 | 0.20 | 0.10 | 0.20 | e | 0.03 | ----- | z | 0.60 | 1.60 | 1.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||||
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | 0.01 | 0.00 | 0.20 | 0.50 | 0.57 | 1.46 | 0.80 | 1.07 | 0.79 | 0.84 | 0.21 | 0.01 | 1.46 | |||||||||||||
1942 | 0.02 | 0.06 | 0.38 | 0.36 | 0.87 | 1.00 | 0.50 | 1.63 | 1.19 | 0.17 | 0.00 | 0.10 | 1.63 | |||||||||||||
1943 | 0.44 | 0.24 | 1.31 | 0.45 | 1.00 | 2.02 | 1.73 | 0.90 | 0.42 | 0.35 | 0.16 | 0.10 | 2.02 | |||||||||||||
1944 | 0.12 | ----- | z | 0.15 | ----- | z | 2.78 | 0.95 | 0.40 | 3.70 | 0.73 | 0.03 | 1.00 | 0.00 | ----- | z | ||||||||||
1945 | 0.04 | 0.25 | 0.62 | 0.23 | 0.46 | 0.52 | 0.47 | 1.15 | 0.68 | 0.14 | 0.09 | 0.20 | 1.15 | |||||||||||||
1946 | 0.06 | 0.28 | 0.50 | 0.50 | 0.73 | 0.78 | v | 0.44 | 0.58 | 1.70 | 0.63 | 0.02 | ----- | z | ----- | z | ||||||||||
1947 | 0.17 | 0.40 | 0.14 | 0.37 | 0.47 | 1.23 | 0.85 | 1.60 | 0.92 | 1.07 | 0.17 | 0.28 | a | 1.60 | a | |||||||||||
1948 | 0.03 | 0.21 | 0.12 | 1.59 | 0.13 | 0.78 | 1.15 | 1.05 | 0.20 | 1.00 | 0.10 | ----- | z | ----- | z | |||||||||||
1949 | 0.30 | 0.08 | 0.20 | 0.55 | 0.68 | 2.07 | 1.43 | 0.25 | 0.15 | 1.40 | 0.12 | 0.30 | 2.07 | |||||||||||||
1950 | 0.50 | 0.14 | 0.74 | 0.40 | 2.15 | a | 2.10 | 0.65 | 0.31 | 0.73 | 0.25 | 0.10 | b | 0.28 | 2.15 | c | ||||||||||
1951 | 0.38 | a | 0.82 | 0.13 | 0.20 | 0.53 | 0.80 | 0.87 | 1.03 | 0.30 | 0.35 | 0.00 | 0.37 | b | 1.03 | c | ||||||||||
1952 | 0.32 | 0.28 | 0.34 | 0.11 | 0.45 | 0.95 | 2.09 | 4.04 | 0.30 | 0.00 | 0.32 | 0.12 | 4.04 | |||||||||||||
1953 | 0.12 | 0.20 | 0.97 | 1.58 | 0.91 | 1.29 | 0.42 | 0.90 | 0.24 | 0.11 | 0.26 | 0.12 | 1.58 | |||||||||||||
1954 | 0.15 | 0.21 | 0.24 | 0.60 | 0.78 | 1.19 | 0.96 | 1.32 | 0.54 | 0.22 | 0.05 | 0.10 | 1.32 | |||||||||||||
1955 | 0.08 | ----- | z | ----- | z | 0.44 | 1.14 | 0.84 | 1.36 | 0.60 | 0.50 | 0.28 | 0.22 | ----- | z | ----- | z | |||||||||
1956 | 0.15 | ----- | z | 0.34 | 0.13 | 0.88 | 2.80 | 1.27 | 1.63 | 0.25 | 0.76 | 1.25 | 0.12 | ----- | z | |||||||||||
1957 | ----- | z | ----- | z | ----- | z | 0.28 | 0.88 | 0.51 | 1.67 | 1.05 | 0.57 | 0.87 | 0.20 | 0.12 | ----- | z | |||||||||
1958 | 0.13 | 1.00 | ----- | z | 0.29 | 0.36 | 0.86 | 1.12 | 1.01 | 0.12 | 0.42 | 0.52 | ----- | z | ----- | z | ||||||||||
1959 | ----- | z | 0.17 | ----- | z | ----- | z | 1.27 | 0.47 | 0.70 | 0.55 | 0.43 | 0.93 | 0.21 | 0.18 | ----- | z | |||||||||
1960 | ----- | z | ----- | z | ----- | z | ----- | z | 0.71 | 0.90 | 1.54 | 1.38 | 0.00 | 0.37 | 0.20 | 0.26 | u | ----- | z | |||||||
1961 | 0.00 | 0.30 | 0.10 | 0.95 | 0.48 | 1.01 | 0.90 | 1.35 | 0.85 | 0.30 | 0.00 | ----- | z | ----- | z | |||||||||||
1962 | 0.20 | 0.33 | 0.19 | 0.15 | 1.31 | 0.70 | 1.95 | 1.44 | 0.55 | 0.25 | 0.60 | 0.00 | 1.95 | |||||||||||||
1963 | 0.00 | 0.15 | 0.10 | 0.41 | 0.30 | 0.71 | 1.19 | 0.89 | 0.59 | 0.14 | 0.03 | 0.05 | 1.19 | |||||||||||||
1964 | 0.27 | 0.05 | 0.23 | 0.75 | 2.10 | 1.77 | 0.60 | 0.62 | 0.43 | 0.20 | 0.15 | 0.15 | 2.10 | |||||||||||||
1965 | 0.12 | 0.05 | 0.20 | 0.73 | 0.43 | 0.90 | 1.86 | 0.63 | 1.13 | 0.60 | 0.17 | 0.43 | 1.86 | |||||||||||||
1966 | 0.03 | 0.14 | 2.00 | 1.43 | 0.13 | c | 1.17 | 1.42 | 1.25 | 0.18 | 0.62 | 0.15 | 0.10 | 2.00 | c | |||||||||||
1967 | 0.28 | 0.45 | 0.31 | 0.62 | 1.45 | 0.42 | 0.10 | 0.27 | 0.93 | 0.69 | 0.05 | 0.41 | 1.45 | |||||||||||||
1968 | 0.08 | 0.05 | 1.25 | 0.93 | 0.61 | 1.26 | 0.96 | 1.59 | 1.05 | 0.00 | 0.08 | 0.24 | 1.59 | |||||||||||||
1969 | 0.25 | 0.36 | 0.09 | 0.52 | 1.20 | 1.67 | 0.55 | 1.87 | 0.79 | 0.14 | 0.00 | 0.20 | 1.87 | |||||||||||||
1970 | 0.06 | 0.45 | 0.40 | 0.77 | 0.72 | 0.40 | 0.81 | 0.07 | 1.52 | 0.37 | 0.26 | 0.13 | 1.52 | |||||||||||||
1971 | 0.20 | 0.16 | 0.10 | 0.42 | 1.31 | 1.15 | 0.97 | 0.18 | 0.90 | 1.83 | 0.13 | 0.15 | 1.83 | |||||||||||||
1972 | 0.18 | 0.22 | 0.28 | 1.09 | 0.58 | 1.44 | 0.85 | 0.30 | 0.19 | 1.17 | 0.05 | 0.26 | 1.44 | |||||||||||||
1973 | ----- | z | 0.00 | 2.04 | 0.57 | 0.27 | 0.70 | 0.70 | 0.69 | 3.02 | 0.74 | 0.07 | 0.36 | ----- | z | |||||||||||
1974 | 0.08 | 0.30 | 0.22 | 1.09 | 0.80 | 0.19 | 1.64 | 0.39 | 0.10 | 0.45 | 0.40 | 0.05 | 1.64 | |||||||||||||
1975 | 0.18 | 0.07 | 0.63 | 1.01 | 0.62 | 1.85 | 0.23 | 3.12 | 1.51 | 0.24 | 0.12 | 0.26 | 3.12 | |||||||||||||
1976 | 0.32 | ----- | z | 0.40 | 2.25 | 0.23 | 0.99 | 0.84 | 0.70 | 0.11 | 0.00 | 0.05 | 0.08 | ----- | z | |||||||||||
1977 | 0.12 | 0.18 | 0.77 | 0.65 | 0.73 | 0.90 | 3.41 | 0.51 | 2.83 | 0.90 | 1.00 | 0.52 | 3.41 | |||||||||||||
1978 | 0.05 | 0.05 | 0.05 | 0.42 | 1.14 | 1.30 | 1.60 | 0.38 | 0.49 | 0.00 | 0.25 | a | 0.10 | 1.60 | a | |||||||||||
1979 | 0.08 | 0.20 | 0.33 | 0.75 | 0.45 | 1.41 | 0.65 | a | 0.57 | 0.35 | 0.07 | 0.00 | 0.20 | 1.41 | a | |||||||||||
1980 | 0.20 | 0.10 | ----- | z | 0.00 | 1.02 | 0.98 | 1.52 | 1.40 | 1.12 | c | 1.56 | 0.00 | 0.06 | ----- | z | ||||||||||
1981 | 0.12 | 0.30 | a | 0.67 | 0.20 | 0.86 | 1.20 | 1.44 | 0.55 | 1.51 | 0.30 | 0.42 | 0.08 | 1.51 | a | |||||||||||
1982 | 0.12 | 0.36 | 0.98 | 0.10 | 0.80 | 1.87 | a | 1.00 | 0.45 | 0.20 | 2.35 | 0.40 | 0.50 | 2.35 | a | |||||||||||
1983 | 0.18 | 0.08 | 0.95 | 0.33 | 1.35 | 0.90 | 0.68 | 0.38 | 0.40 | 0.75 | 0.32 | b | 0.40 | l | 1.35 | n | ||||||||||
1984 | 0.84 | 0.20 | 0.62 | 0.81 | 0.35 | a | 1.35 | 1.02 | 0.22 | 0.31 | 0.48 | ----- | z | 0.14 | ----- | z | ||||||||||
1985 | 0.06 | 0.07 | 0.21 | 0.14 | 0.75 | 1.02 | 0.13 | 0.75 | 0.35 | 1.00 | 0.32 | 0.07 | 1.02 | |||||||||||||
1986 | 0.07 | 0.06 | 0.00 | 0.85 | 0.90 | 1.15 | 1.75 | 0.25 | 1.51 | 0.50 | 1.05 | 0.00 | 1.75 | |||||||||||||
1987 | 0.28 | 0.60 | 0.20 | 0.01 | 2.35 | 1.65 | 0.90 | 1.01 | 0.15 | 0.05 | 0.03 | 0.00 | 2.35 | |||||||||||||
1988 | 0.25 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.37 | 1.01 | 0.30 | 0.18 | 0.28 | 0.17 | ----- | z | |||||||
1989 | 0.12 | 0.02 | 0.33 | 0.33 | 0.65 | 0.57 | 1.86 | 1.43 | 0.42 | 0.07 | 0.47 | 0.02 | 1.86 | |||||||||||||
1990 | 0.32 | 0.10 | 0.25 | 0.45 | 0.15 | 1.55 | 1.14 | 0.76 | 0.76 | 0.46 | 0.00 | 0.15 | 1.55 | |||||||||||||
1991 | 0.06 | 0.17 | 0.10 | 1.16 | 0.98 | 0.80 | 0.55 | 0.18 | 2.47 | 0.69 | 0.21 | 0.07 | 2.47 | |||||||||||||
1992 | 0.34 | 0.13 | 0.22 | 0.11 | 0.76 | 0.57 | 0.85 | 0.37 | 4.01 | 0.50 | 0.31 | 0.15 | 4.01 | |||||||||||||
1993 | 0.14 | 0.22 | 0.22 | 0.25 | 1.83 | 1.48 | 4.12 | 1.00 | 0.02 | 0.14 | 0.30 | 0.26 | 4.12 | |||||||||||||
1994 | 0.06 | 0.07 | 0.11 | 0.50 | 0.59 | 0.32 | 1.68 | 0.40 | 0.68 | 1.20 | 0.51 | a | 0.28 | 1.68 | a | |||||||||||
1995 | 0.29 | 0.12 | 0.41 | 0.29 | 1.23 | 0.41 | 1.53 | 1.71 | 0.26 | 0.57 | 0.23 | 0.41 | 1.71 | |||||||||||||
1996 | 0.54 | 0.16 | 0.35 | 0.17 | 0.88 | 0.85 | 1.00 | 1.23 | 0.72 | 0.99 | 0.58 | 0.32 | a | 1.23 | a | |||||||||||
1997 | 0.71 | d | 0.24 | 0.68 | 2.20 | a | 0.21 | 1.64 | 1.31 | 1.61 | 2.41 | 1.12 | 0.22 | a | 0.08 | 2.41 | f | |||||||||
1998 | 0.12 | 0.50 | 0.18 | 1.10 | 0.62 | 0.65 | 1.28 | 2.20 | 0.31 | 1.36 | 0.53 | 0.10 | 2.20 | |||||||||||||
1999 | 0.28 | 0.22 | 0.15 | 1.42 | 1.96 | 0.63 | 1.05 | 1.43 | 0.55 | 0.33 | 0.03 | 0.12 | 1.96 | |||||||||||||
2000 | 0.08 | 0.61 | 0.65 | 0.33 | a | 0.73 | 0.73 | 1.63 | 0.73 | 0.79 | 1.00 | 0.45 | 0.37 | 1.63 | a | |||||||||||
2001 | 0.23 | 0.12 | 0.00 | 0.55 | 0.94 | 0.75 | 0.81 | 0.65 | 0.25 | 1.01 | 0.08 | 0.07 | 1.01 | |||||||||||||
2002 | 0.11 | a | 0.13 | 0.12 | 0.78 | 0.35 | 0.23 | 2.80 | b | 0.90 | 0.19 | a | ----- | z | 0.00 | 0.40 | ----- | z | ||||||||
2003 | 0.40 | 0.03 | 0.26 | 0.39 | 2.10 | 0.45 | 0.60 | 0.45 | ----- | z | 0.30 | 0.18 | 0.11 | ----- | z | |||||||||||
2004 | 0.48 | 0.02 | 2.60 | 0.50 | 1.57 | 0.73 | 2.50 | 0.82 | 1.10 | 0.40 | 0.00 | 0.03 | 2.60 | |||||||||||||
2005 | 0.35 | 0.04 | 0.00 | 0.46 | 1.38 | 1.01 | e | 1.48 | 0.65 | 0.65 | 0.95 | 0.42 | 0.38 | d | 1.48 | i | ||||||||||
2006 | 0.06 | 0.14 | 0.12 | 0.96 | 1.60 | 1.35 | a | 0.50 | 1.50 | c | 0.50 | 0.93 | k | 0.00 | 0.50 | 1.60 | o | |||||||||
2007 | 0.03 | 0.50 | c | 0.90 | 0.29 | 1.82 | 2.23 | b | 1.50 | 0.85 | a | 1.10 | 0.65 | 0.05 | 0.15 | 2.23 | f | |||||||||
2008 | 0.00 | 0.18 | 0.20 | 0.10 | 0.18 | 2.15 | 1.00 | 0.80 | 0.95 | 1.25 | 1.00 | 0.30 | 2.15 | |||||||||||||
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.58 | k | 1.30 | 0.53 | a | 0.07 | 0.60 | b | ----- | z | ||
2010 | 0.60 | b | 0.90 | 0.45 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.21 | 0.23 | 0.44 | 0.60 | 0.91 | 1.09 | 1.20 | 1.00 | 0.79 | 0.59 | 0.26 | 0.19 | 1.94 | |||||||||||||
S.D. | 0.18 | 0.21 | 0.50 | 0.48 | 0.58 | 0.55 | 0.71 | 0.73 | 0.76 | 0.48 | 0.29 | 0.15 | 0.75 | |||||||||||||
SKEW | 1.42 | 1.84 | 2.41 | 1.48 | 1.08 | 0.77 | 1.51 | 2.01 | 2.01 | 1.16 | 1.67 | 0.81 | 1.55 | |||||||||||||
MAX | 0.84 | 1.00 | 2.60 | 2.25 | 2.78 | 2.80 | 4.12 | 4.04 | 4.01 | 2.35 | 1.25 | 0.60 | 4.12 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.13 | 0.19 | 0.10 | 0.07 | 0.00 | 0.00 | 0.00 | 0.00 | 1.01 | |||||||||||||
YRS | 68 | 64 | 64 | 65 | 68 | 69 | 71 | 71 | 71 | 68 | 69 | 64 | 46 |