YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | 0.02 | 0.40 | 0.40 | 0.84 | 1.02 | 0.14 | 2.01 | 2.00 | 0.20 | 1.93 | 0.00 | z | 2.43 | 11.39 | ||||||||||||
1915 | 0.68 | 0.50 | 0.51 | 2.05 | 0.00 | z | 0.00 | z | 2.92 | 0.83 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 7.49 | |||||||
1916 | 2.16 | 0.00 | z | 0.00 | 0.00 | z | 0.00 | 0.00 | z | 0.00 | z | 1.95 | 0.34 | 2.77 | 0.00 | 0.00 | 7.22 | |||||||||
1917 | 0.35 | 0.73 | 0.00 | 0.12 | 0.50 | 0.18 | 0.25 | 0.56 | 0.60 | 0.00 | 0.00 | 0.00 | 3.29 | |||||||||||||
1918 | 0.29 | 0.31 | 0.98 | 0.33 | 0.49 | 0.34 | 0.95 | 1.46 | 0.15 | 1.79 | 0.24 | 0.30 | 7.63 | |||||||||||||
1919 | 0.00 | 0.13 | 1.25 | 1.93 | 1.34 | 0.84 | 4.12 | 0.98 | 1.36 | 1.61 | 0.68 | 0.79 | 15.03 | |||||||||||||
1920 | 0.04 | 0.30 | 0.43 | 0.38 | 1.07 | 0.67 | 0.15 | 0.76 | 0.29 | 1.12 | 0.08 | 0.23 | 5.52 | |||||||||||||
1921 | 0.12 | 0.18 | 0.86 | 0.00 | 0.28 | 2.46 | 2.77 | 2.60 | 0.37 | 0.37 | 0.00 | 0.28 | 10.29 | |||||||||||||
1922 | 0.03 | 0.07 | 0.47 | 0.16 | 0.31 | 0.33 | 0.25 | 1.28 | 0.12 | 0.13 | 0.89 | 0.05 | 4.09 | |||||||||||||
1923 | 0.14 | 0.34 | 0.99 | 0.70 | 0.35 | 0.00 | 0.34 | 2.34 | 0.45 | 0.84 | 1.10 | 0.36 | 7.95 | |||||||||||||
1924 | 0.00 | 0.23 | 0.58 | 0.82 | 0.22 | 0.32 | 2.51 | 0.82 | 0.22 | 0.10 | 0.11 | 0.44 | 6.37 | |||||||||||||
1925 | 0.52 | 0.00 | 0.07 | 0.26 | 0.22 | 0.57 | 0.58 | 0.49 | 1.13 | 1.23 | 0.26 | 0.15 | 5.48 | |||||||||||||
1926 | 0.15 | 0.04 | 1.08 | 0.63 | 1.99 | 0.34 | 1.16 | 0.47 | 1.04 | 1.21 | 0.00 | 1.10 | 9.21 | |||||||||||||
1927 | 0.03 | 0.42 | 0.35 | 0.21 | 0.00 | 1.61 | 1.93 | 1.63 | 1.14 | 0.22 | 0.00 | 0.16 | 7.70 | |||||||||||||
1928 | 0.00 | 0.21 | 0.10 | 0.57 | 1.63 | 0.00 | 2.54 | 1.96 | 0.05 | 0.88 | 0.27 | 0.20 | 8.41 | |||||||||||||
1929 | 0.05 | 0.35 | 0.08 | 0.08 | 3.56 | 0.00 | 1.23 | 1.44 | 3.31 | 1.56 | 0.74 | 0.18 | 12.58 | |||||||||||||
1930 | 0.01 | 0.43 | 0.74 | 0.15 | 0.23 | 0.00 | 4.45 | 1.09 | 0.36 | 0.31 | 0.50 | 0.04 | 8.31 | |||||||||||||
1931 | 0.20 | 1.02 | 0.52 | 2.58 | 0.99 | 0.53 | 0.69 | 0.23 | 2.18 | 0.57 | 1.19 | 0.07 | 10.77 | |||||||||||||
1932 | 0.45 | 0.40 | 0.27 | 0.34 | 1.41 | 0.09 | 2.01 | 2.20 | 0.78 | 1.46 | 0.00 | 0.37 | 9.78 | |||||||||||||
1933 | 0.08 | 0.01 | 0.09 | 0.39 | 0.23 | 3.81 | 2.04 | 2.42 | 1.12 | 0.24 | 0.91 | 0.05 | 11.39 | |||||||||||||
1934 | 0.06 | 0.04 | 0.01 | 0.13 | 0.72 | 0.37 | 0.61 | 2.10 | 1.08 | 0.24 | 0.84 | 0.78 | 6.98 | |||||||||||||
1935 | 0.91 | 0.20 | 0.03 | 0.48 | 0.91 | 1.40 | 0.19 | 3.74 | 1.19 | 0.26 | 1.37 | 0.36 | 11.04 | |||||||||||||
1936 | 0.55 | 0.12 | 0.11 | 0.09 | 0.27 | 0.43 | 0.67 | 0.62 | 2.05 | 0.17 | 0.00 | 0.13 | 5.21 | |||||||||||||
1937 | 0.21 | 0.11 | 0.63 | 0.42 | 2.78 | 1.91 | 1.02 | 0.22 | 0.87 | 0.79 | 0.01 | 0.48 | 9.45 | |||||||||||||
1938 | 0.12 | 0.49 | 0.22 | 0.20 | 0.02 | 1.51 | 1.45 | 0.17 | 2.36 | 0.63 | 0.02 | 0.36 | 7.55 | |||||||||||||
1939 | 0.70 | 0.32 | 0.67 | 0.86 | 0.14 | 0.00 | 2.33 | 0.54 | 1.19 | 0.83 | 0.78 | 0.10 | 8.46 | |||||||||||||
1940 | 0.52 | 0.58 | 0.48 | 0.21 | 1.71 | 1.32 | 0.62 | 3.25 | 1.99 | 0.36 | 1.45 | 0.87 | 13.36 | |||||||||||||
1941 | 1.17 | 0.20 | 1.00 | 1.20 | 3.07 | 0.90 | 2.15 | 1.07 | 1.85 | 2.67 | 0.37 | 0.23 | 15.88 | |||||||||||||
1942 | 0.13 | 0.54 | 0.39 | 1.97 | 0.00 | 0.22 | 0.20 | 1.42 | 1.55 | 0.73 | 0.00 | 1.10 | 8.25 | |||||||||||||
1943 | 0.25 | 0.26 | 0.23 | 0.06 | 1.41 | 1.20 | 1.19 | 1.33 | 0.39 | 0.22 | 0.14 | 0.94 | 7.62 | |||||||||||||
1944 | 0.46 | 0.42 | 0.49 | 0.91 | 0.57 | 0.85 | 1.58 | 1.44 | 0.65 | 0.86 | 0.56 | 0.76 | 9.55 | |||||||||||||
1945 | 0.34 | 0.32 | 0.50 | 0.77 | 0.00 | 0.00 | 1.09 | 2.27 | 0.26 | 0.43 | 0.00 | 0.35 | 6.33 | |||||||||||||
1946 | 0.25 | 0.33 | 1.03 | 0.26 | 0.31 | 0.03 | 2.28 | 1.49 | 0.57 | 1.02 | 0.54 | 0.12 | 8.23 | |||||||||||||
1947 | 0.00 | 0.00 | 0.03 | 0.03 | 0.48 | 0.23 | 0.38 | 1.45 | 0.67 | 0.31 | 0.36 | 0.91 | 4.85 | |||||||||||||
1948 | 0.18 | 1.42 | 0.41 | 0.33 | 0.94 | 0.57 | 0.46 | 0.51 | 0.80 | 0.60 | 0.11 | 0.11 | 6.44 | |||||||||||||
1949 | 0.61 | 0.29 | 0.65 | 0.67 | 1.35 | 0.32 | 2.21 | 0.72 | 0.87 | 0.14 | 0.00 | 0.59 | 8.42 | |||||||||||||
1950 | 0.02 | 0.38 | 0.04 | 0.27 | 0.06 | 0.23 | 2.00 | 0.08 | 1.01 | 0.01 | 0.00 | 0.00 | 4.10 | |||||||||||||
1951 | 0.41 | 0.27 | 0.29 | 0.38 | 0.10 | 0.02 | 0.85 | 2.22 | 0.05 | 0.37 | 0.14 | 0.28 | 5.38 | |||||||||||||
1952 | 0.20 | 0.17 | 0.59 | 0.76 | 0.65 | 1.64 | 1.91 | 1.10 | 0.34 | 0.00 | 0.53 | 0.20 | 8.09 | |||||||||||||
1953 | 0.00 | 0.43 | 0.74 | 0.69 | 0.03 | 0.35 | 0.53 | 0.59 | 0.06 | 0.46 | 0.91 | 0.29 | 5.08 | |||||||||||||
1954 | 0.20 | 0.07 | 0.24 | 0.00 | 0.51 | 0.01 | 1.45 | 0.65 | 0.77 | 0.25 | 0.22 | 0.14 | 4.51 | |||||||||||||
1955 | 0.29 | 0.18 | 0.00 | 0.04 | 0.53 | 0.33 | 1.60 | 1.32 | 1.94 | 0.06 | 0.00 | 0.22 | 6.51 | |||||||||||||
1956 | 0.46 | 0.49 | 0.00 | 0.00 | 0.18 | 0.43 | 1.49 | 0.62 | 0.02 | 0.34 | 0.03 | 0.00 | 4.06 | |||||||||||||
1957 | 0.78 | 0.59 | 0.52 | 0.38 | 0.35 | 0.04 | 2.48 | 1.32 | 0.00 | 2.59 | 1.24 | 0.32 | 10.61 | |||||||||||||
1958 | 0.21 | 0.27 | 1.71 | 0.62 | 0.43 | 0.22 | 0.14 | 1.74 | 1.34 | 1.72 | 0.37 | 1.35 | 10.12 | |||||||||||||
1959 | 0.17 | 0.04 | 0.42 | 0.43 | 0.80 | 0.78 | 0.73 | 2.79 | 0.36 | 1.70 | 0.07 | 1.85 | 10.14 | |||||||||||||
1960 | 0.34 | 0.38 | 0.44 | 0.19 | 0.71 | 0.91 | 0.47 | 0.78 | 0.56 | 2.88 | 0.07 | 0.39 | 8.12 | |||||||||||||
1961 | 0.23 | 0.10 | 0.61 | 0.73 | 0.01 | 0.11 | 2.70 | 1.69 | 1.09 | 0.47 | 0.48 | 0.65 | 8.87 | |||||||||||||
1962 | 1.01 | 0.11 | 0.18 | 0.07 | 0.01 | 0.19 | 1.24 | 0.00 | 0.71 | 0.75 | 0.61 | 0.51 | 5.39 | |||||||||||||
1963 | 0.29 | 0.24 | 0.55 | 0.14 | 0.03 | 0.11 | 1.43 | 3.00 | 0.63 | 0.76 | 0.29 | 0.00 | 7.47 | |||||||||||||
1964 | 0.07 | 1.12 | 0.13 | 0.61 | 0.35 | 0.00 | 1.87 | 0.98 | 1.57 | 0.04 | 0.21 | 0.49 | 7.44 | |||||||||||||
1965 | 0.47 | 0.60 | 0.49 | 0.49 | 0.19 | 0.99 | 1.65 | 0.61 | 1.18 | 0.89 | 0.33 | 1.42 | 9.31 | |||||||||||||
1966 | 0.42 | 0.30 | 0.00 | 0.04 | 0.02 | 1.66 | 1.63 | 1.06 | 1.04 | 0.54 | 0.09 | 0.01 | 6.81 | |||||||||||||
1967 | 0.01 | 0.44 | 0.25 | 0.00 | 0.04 | 1.71 | 0.61 | 3.30 | 0.79 | 0.18 | 0.15 | 0.56 | 8.04 | |||||||||||||
1968 | 0.01 | 0.98 | 1.48 | 0.51 | 0.99 | 0.05 | 3.33 | 1.49 | 0.30 | 0.12 | 0.59 | 0.82 | 10.67 | |||||||||||||
1969 | 0.08 | 0.34 | 0.41 | 1.76 | 1.31 | 0.59 | 0.94 | 0.95 | 1.08 | 2.37 | 0.01 | 0.72 | 10.56 | |||||||||||||
1970 | 0.00 | 0.27 | 0.42 | 0.05 | 0.33 | 0.40 | 1.22 | 2.24 | 0.79 | 0.25 | 0.08 | 0.23 | 6.28 | |||||||||||||
1971 | 0.27 | 0.21 | 0.03 | 0.78 | 0.16 | 0.02 | 1.05 | 0.87 | 1.44 | 1.15 | 0.67 | 1.40 | 8.05 | |||||||||||||
1972 | 0.12 | 0.12 | 0.08 | 0.00 | 0.18 | 0.55 | 1.00 | 2.93 | 1.00 | 3.08 | 0.69 | 0.36 | 10.11 | |||||||||||||
1973 | 0.85 | 0.33 | 2.18 | 0.91 | 0.66 | 1.37 | 1.80 | 1.19 | 1.13 | 0.35 | 0.08 | 0.03 | 10.88 | |||||||||||||
1974 | 0.88 | 0.11 | 0.85 | 0.14 | 0.01 | 0.22 | 2.40 | 0.79 | 1.58 | 1.96 | 0.38 | 0.51 | 9.83 | |||||||||||||
1975 | 0.26 | 0.99 | 0.95 | 0.10 | 0.66 | 0.00 | 1.43 | 1.40 | 1.66 | 0.00 | 0.28 | 0.28 | 8.01 | |||||||||||||
1976 | 0.00 | 0.40 | 0.09 | 0.31 | 0.82 | 0.60 | 1.32 | 0.73 | 0.45 | 0.03 | 0.24 | 0.20 | 5.19 | |||||||||||||
1977 | 0.88 | 0.13 | 0.63 | 1.07 | 0.10 | 0.04 | 0.69 | 2.28 | 0.78 | 0.76 | 0.42 | 0.13 | 7.91 | |||||||||||||
1978 | 1.32 | 1.02 | 0.54 | 0.05 | 0.69 | 1.05 | 0.24 | 2.49 | 0.59 | 1.22 | 1.00 | 0.76 | 10.97 | |||||||||||||
1979 | 1.07 | 0.62 | 0.14 | 0.24 | 2.48 | 1.02 | 0.80 | 1.53 | 0.40 | 0.27 | 0.91 | 0.87 | 10.35 | |||||||||||||
1980 | 0.87 | 0.58 | 0.60 | 0.60 | 0.56 | 0.01 | 0.08 | 2.61 | 1.83 | 0.09 | 0.30 | 0.74 | 8.87 | |||||||||||||
1981 | 0.05 | 0.67 | 0.80 | 0.30 | 0.53 | 0.35 | 1.07 | 1.68 | 0.41 | 1.43 | 0.37 | 0.00 | 7.66 | |||||||||||||
1982 | 0.32 | 0.20 | 0.84 | 0.05 | 0.52 | 0.09 | 1.32 | 1.09 | 1.34 | 0.26 | 0.60 | 0.78 | 7.41 | |||||||||||||
1983 | 1.10 | 0.71 | 0.61 | 0.02 | 0.32 | 1.21 | 0.55 | 0.27 | 0.91 | 1.20 | 0.44 | 0.42 | 7.76 | |||||||||||||
1984 | 0.33 | 0.00 | 0.62 | 0.50 | 0.16 | 0.48 | 1.13 | 2.70 | 1.13 | 3.04 | 0.63 | 1.36 | 12.08 | |||||||||||||
1985 | 0.49 | 0.54 | 0.70 | 1.69 | 1.12 | 0.53 | 1.16 | 0.49 | 1.53 | 2.15 | 0.19 | 0.16 | 10.75 | |||||||||||||
1986 | 0.22 | 1.01 | 0.17 | 0.33 | 1.11 | 2.57 | 1.51 | 2.26 | 0.53 | 1.54 | 1.29 | 0.44 | 12.98 | |||||||||||||
1987 | 0.66 | 0.61 | 0.07 | 1.00 | 0.58 | 0.13 | 0.91 | 2.98 | 0.20 | 0.44 | 0.42 | 0.34 | 8.34 | |||||||||||||
1988 | 0.15 | 0.07 | 0.85 | 1.42 | 0.62 | 1.25 | 2.26 | 3.29 | 2.63 | 0.32 | 0.22 | 0.03 | 13.11 | |||||||||||||
1989 | 0.57 | 0.35 | 0.48 | 0.00 | 0.02 | 0.02 | 1.51 | 0.48 | 0.31 | 0.97 | 0.00 | 0.28 | 4.99 | |||||||||||||
1990 | 0.21 | 0.49 | 0.41 | 1.71 | 0.45 | 0.27 | 2.36 | 1.79 | 0.96 | 0.15 | 0.86 | 0.59 | 10.25 | |||||||||||||
1991 | 0.60 | 0.06 | 0.14 | 0.00 | 1.14 | 0.65 | 2.63 | 1.26 | 1.43 | 0.26 | 1.93 | 1.49 | 11.59 | |||||||||||||
1992 | 0.60 | 0.20 | 0.63 | 0.22 | 1.81 | 0.67 | 2.01 | 2.17 | 0.79 | 0.70 | 1.12 | 1.16 | 12.08 | |||||||||||||
1993 | 0.94 | 1.82 | 0.22 | 0.00 | 0.20 | 0.44 | 0.23 | 3.05 | 0.49 | 0.64 | 0.97 | 0.03 | 9.03 | |||||||||||||
1994 | 0.02 | 0.26 | 0.59 | 0.07 | 1.87 | 0.28 | 0.61 | 2.70 | 1.21 | 1.54 | 1.38 | 0.62 | 11.15 | |||||||||||||
1995 | 0.55 | 0.39 | 0.16 | 0.69 | 0.08 | 0.20 | 0.35 | 0.74 | 2.32 | 0.00 | 0.03 | 0.17 | 5.68 | |||||||||||||
1996 | 0.17 | 0.19 | 0.02 | 0.00 | 0.02 | 2.86 | 1.03 | 1.54 | 1.45 | 1.52 | 0.95 | 0.00 | 9.75 | |||||||||||||
1997 | 0.55 | 0.12 | 0.11 | 1.65 | 0.42 | 1.03 | 2.04 | 1.96 | 2.43 | 0.32 | 0.73 | 1.00 | 12.36 | |||||||||||||
1998 | 0.14 | 0.66 | 2.34 | 0.64 | 0.00 | 0.17 | 2.37 | 0.88 | 0.15 | 1.80 | 0.46 | 0.22 | 9.83 | |||||||||||||
1999 | 0.12 | 0.00 | 1.10 | 0.59 | 0.54 | 0.60 | 1.47 | 3.04 | 0.54 | 0.26 | 0.00 | 0.03 | 8.29 | |||||||||||||
2000 | 0.30 | 0.30 | 1.27 | 0.00 | 0.07 | 0.72 | 0.83 | 0.57 | 0.37 | 2.66 | 0.91 | 0.24 | 8.24 | |||||||||||||
2001 | 0.28 | 0.27 | 0.27 | 0.51 | 0.38 | 0.26 | 1.37 | 1.59 | 0.51 | 0.14 | 0.68 | 0.24 | 6.50 | |||||||||||||
2002 | 0.34 | 0.07 | 0.00 | 0.39 | 0.02 | 0.18 | 0.88 | 1.59 | 1.53 | 0.54 | 0.49 | 0.36 | 6.39 | |||||||||||||
2003 | 0.00 | 1.02 | 1.45 | 0.00 | 0.09 | 0.20 | 0.41 | 0.71 | 0.29 | 1.58 | 0.49 | 0.11 | 6.35 | |||||||||||||
2004 | 0.10 | 1.17 | 0.67 | 3.00 | 0.00 | 0.61 | 2.25 | 0.23 | 0.97 | 1.13 | 1.37 | 0.30 | 11.80 | |||||||||||||
2005 | 1.38 | 1.78 | 1.12 | 1.17 | 0.40 | 0.09 | 1.03 | 0.49 | 2.83 | 1.03 | 0.00 | 0.10 | 11.42 | |||||||||||||
2006 | 0.04 | 0.00 | 0.14 | 0.13 | 0.00 | 1.16 | a | 1.83 | k | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.47 | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.37 | 0.40 | 0.52 | 0.54 | 0.62 | 0.62 | 1.38 | 1.46 | 0.96 | 0.88 | 0.46 | 0.46 | 8.59 | |||||||||||||
S.D. | 0.38 | 0.37 | 0.46 | 0.61 | 0.71 | 0.70 | 0.89 | 0.90 | 0.70 | 0.81 | 0.44 | 0.46 | 2.59 | |||||||||||||
SKEW | 1.76 | 1.75 | 1.49 | 1.81 | 1.92 | 1.98 | 0.86 | 0.51 | 0.99 | 1.09 | 0.94 | 1.67 | 0.27 | |||||||||||||
MAX | 2.16 | 1.82 | 2.34 | 3.00 | 3.56 | 3.81 | 4.45 | 3.74 | 3.31 | 3.08 | 1.93 | 2.43 | 15.88 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.08 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.29 | |||||||||||||
NO YRS | 93 | 92 | 93 | 92 | 92 | 91 | 91 | 92 | 91 | 91 | 90 | 91 | 89 |