YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | 1.90 | 1.18 | 0.41 | 0.98 | 0.20 | 0.12 | 0.52 | 0.30 | 0.08 | 0.00 | 0.50 | 2.88 | 9.07 | |||||||||||||
1916 | 2.49 | 0.19 | 0.30 | 0.12 | 0.00 | 0.00 | 0.97 | 0.97 | 2.14 | 0.64 | 0.00 | 0.44 | 8.26 | |||||||||||||
1917 | 2.61 | 1.10 | 0.27 | 0.90 | ----- | z | 0.00 | 1.70 | 0.32 | 0.55 | 0.00 | 0.00 | 0.00 | 7.45 | a | |||||||||||
1918 | 1.04 | 0.52 | 0.40 | 0.00 | 0.00 | 0.18 | 1.49 | 3.63 | 0.58 | 0.38 | 1.75 | a | 1.22 | 11.19 | ||||||||||||
1919 | 0.40 | 0.93 | 1.05 | 0.08 | 0.09 | 0.00 | 1.42 | 2.23 | 2.03 | 0.26 | 1.72 | ----- | z | 10.21 | a | |||||||||||
1920 | 0.40 | d | 1.56 | 1.64 | 0.00 | ----- | z | 0.00 | 0.92 | 1.64 | 0.00 | 0.53 | 0.00 | 0.00 | 6.69 | a | ||||||||||
1921 | ----- | z | 0.04 | 0.04 | 0.05 | 0.30 | 0.30 | 0.56 | 1.27 | 0.40 | ----- | z | ----- | z | ----- | z | 2.96 | d | ||||||||
1922 | 1.35 | 0.63 | 0.82 | 0.35 | 0.45 | 0.05 | 0.51 | 0.50 | 0.30 | 0.00 | a | 1.00 | 1.85 | 7.81 | ||||||||||||
1923 | 0.15 | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 2.22 | 1.48 | 0.39 | 0.37 | 3.72 | 2.00 | 10.33 | d | ||||||||
1924 | 0.00 | 0.00 | 2.00 | 0.23 | a | 0.00 | 0.00 | 0.00 | 0.00 | 0.46 | ----- | z | 0.00 | 0.94 | 3.63 | a | ||||||||||
1925 | 0.10 | 0.00 | 0.15 | 0.40 | 0.00 | 0.00 | i | 0.23 | a | 0.15 | 0.75 | 0.89 | 0.00 | 0.04 | 2.71 | a | ||||||||||
1926 | 0.61 | 0.00 | 1.60 | 2.60 | 0.14 | 0.00 | 1.31 | 0.15 | 2.08 | 0.00 | 0.00 | f | 2.44 | 10.93 | a | |||||||||||
1927 | ----- | z | 1.22 | ----- | z | 0.00 | ----- | z | 0.03 | 0.46 | 0.40 | 0.65 | 0.55 | 0.00 | 1.91 | 5.22 | c | |||||||||
1928 | 0.00 | 0.87 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.96 | 1.70 | 0.91 | 0.11 | 0.65 | a | 5.30 | ||||||||||||
1929 | 1.32 | 0.21 | ----- | z | 0.00 | 0.00 | 0.00 | 0.89 | 0.86 | 1.07 | 0.08 | 0.00 | 0.00 | 4.43 | a | |||||||||||
1930 | 1.50 | 0.17 | 1.70 | 0.56 | 0.96 | 0.30 | 0.52 | 0.67 | 0.31 | 0.00 | 0.74 | 0.00 | 7.43 | |||||||||||||
1931 | 0.00 | 3.00 | 0.00 | 0.60 | 0.00 | ----- | z | 0.74 | 2.11 | ----- | z | 0.31 | a | 2.62 | 0.88 | 10.26 | b | |||||||||
1932 | 0.12 | 2.76 | 0.00 | 0.00 | 0.00 | 0.05 | 0.53 | 0.00 | 0.25 | 1.87 | 0.00 | 1.81 | 7.39 | |||||||||||||
1933 | 2.12 | 0.19 | 0.00 | 1.27 | 0.00 | 0.00 | 0.00 | 0.52 | 0.52 | 0.60 | 0.67 | 0.00 | 5.89 | |||||||||||||
1934 | 0.00 | 0.88 | 0.00 | 0.00 | ----- | z | 0.07 | 0.41 | 2.41 | 0.13 | 0.00 | 0.51 | 1.92 | 6.33 | a | |||||||||||
1935 | 1.08 | a | 2.33 | 0.91 | 0.09 | 0.18 | 0.00 | ----- | z | 3.58 | 1.03 | ----- | z | 0.52 | 0.44 | 10.16 | b | |||||||||
1936 | 1.06 | 1.48 | ----- | z | 0.00 | 0.00 | 0.00 | ----- | z | 1.40 | 0.30 | 0.00 | 0.25 | 2.15 | 6.64 | b | ||||||||||
1937 | 0.10 | 0.50 | 1.49 | 0.00 | 0.05 | 0.00 | 0.47 | 0.10 | 0.72 | 0.00 | 0.00 | 0.53 | 3.96 | |||||||||||||
1938 | 0.41 | 0.47 | 0.74 | 0.00 | 0.00 | 0.50 | 0.18 | 0.66 | 0.00 | 0.00 | 0.00 | 1.73 | 4.69 | |||||||||||||
1939 | 0.05 | ----- | z | 0.19 | ----- | z | 0.00 | 0.00 | 0.69 | 1.90 | 4.74 | 0.04 | 0.58 | 0.00 | 8.19 | b | ||||||||||
1940 | 0.00 | 0.57 | 0.38 | 0.00 | 0.00 | 0.00 | 0.56 | 0.27 | 1.75 | 1.23 | 0.20 | 3.74 | 8.70 | |||||||||||||
1941 | 0.96 | 1.73 | 3.96 | 2.00 | 0.83 | 0.12 | 1.19 | 1.07 | 1.70 | 1.22 | 0.22 | g | ----- | z | 14.78 | b | ||||||||||
1942 | 0.42 | 0.32 | 0.33 | 0.82 | 0.00 | a | 0.00 | 0.76 | 0.46 | 0.00 | 0.36 | 0.00 | 0.51 | 3.98 | ||||||||||||
1943 | 0.91 | 0.03 | 0.51 | 0.00 | 0.00 | f | 0.00 | a | 0.00 | 4.04 | b | 0.53 | d | 0.20 | 0.00 | g | 1.91 | c | 8.13 | b | ||||||
1944 | 0.37 | 2.59 | 1.28 | 0.08 | 1.01 | 0.00 | 0.61 | 0.11 | 0.20 | 0.12 | 1.29 | 1.24 | 8.90 | |||||||||||||
1945 | 1.38 | ----- | z | 0.98 | 0.00 | 0.00 | 0.00 | 1.22 | 1.05 | 0.10 | 0.38 | 0.00 | 0.47 | 5.58 | a | |||||||||||
1946 | 1.13 | 0.29 | 0.04 | b | 0.18 | 0.00 | 0.00 | 0.73 | g | 1.70 | 2.92 | 0.06 | 0.86 | 0.92 | f | 7.18 | b | |||||||||
1947 | 0.00 | f | 0.10 | 0.00 | 0.00 | 0.40 | 0.00 | 0.02 | 2.92 | 0.57 | 0.00 | 0.79 | 0.77 | h | 4.80 | b | ||||||||||
1948 | 0.00 | 1.45 | 0.20 | 0.00 | 0.00 | 0.14 | 0.17 | a | 0.34 | 0.00 | 0.68 | 0.00 | 0.90 | 3.88 | ||||||||||||
1949 | 1.95 | 0.12 | 0.33 | 0.14 | 0.02 | 0.35 | 0.38 | 0.26 | 1.14 | 0.57 | 0.27 | 0.91 | 6.44 | |||||||||||||
1950 | 0.31 | 0.96 | 0.33 | 0.00 | 0.00 | 0.10 | 0.48 | 0.24 | 0.42 | 0.00 | 0.05 | 0.00 | 2.89 | |||||||||||||
1951 | 1.63 | 0.27 | 0.24 | 1.14 | 0.18 | 0.00 | 1.15 | 5.53 | 0.36 | 0.49 | 0.71 | 0.59 | 12.29 | |||||||||||||
1952 | 0.73 | 0.51 | 2.93 | 1.78 | 0.00 | 0.00 | 0.49 | 1.96 | 0.08 | 0.00 | 3.01 | 0.64 | 12.13 | |||||||||||||
1953 | 0.30 | 0.73 | 0.66 | 0.00 | 0.10 | 0.00 | 2.73 | 0.15 | 0.00 | 0.00 | 0.04 | 0.08 | 4.79 | |||||||||||||
1954 | 0.94 | 0.45 | 0.69 | i | 0.00 | 0.10 | 0.00 | 1.53 | 0.31 | 0.10 | e | 0.11 | 0.00 | 0.00 | 3.54 | a | ||||||||||
1955 | 2.33 | 0.16 | 0.00 | 0.00 | 0.00 | 0.75 | 3.12 | 1.81 | 0.00 | 0.03 | 0.13 | 0.26 | 8.59 | |||||||||||||
1956 | 0.53 | 0.72 | 0.00 | 0.00 | 0.00 | 0.00 | 0.77 | 0.50 | 0.00 | 0.19 | 0.00 | 0.00 | 2.71 | |||||||||||||
1957 | 1.72 | 0.65 | 0.59 | 0.29 | 0.53 | 0.40 | 1.04 | 1.09 | 0.00 | 2.59 | 0.04 | 0.03 | c | 8.97 | ||||||||||||
1958 | 0.00 | 1.01 | 2.21 | 0.93 | 0.00 | 0.00 | q | ----- | z | 0.05 | f | 2.48 | 0.80 | 0.30 | 0.00 | 7.73 | c | |||||||||
1959 | ----- | z | 0.97 | 0.00 | 0.03 | 0.00 | 0.00 | 0.15 | ----- | z | 0.00 | 1.91 | 0.30 | 2.68 | 6.04 | b | ||||||||||
1960 | 1.12 | 0.00 | ----- | z | 0.00 | 0.00 | 0.00 | ----- | z | 0.83 | ----- | z | ----- | z | ----- | z | ----- | z | 1.95 | f | ||||||
1961 | 0.23 | 0.00 | 0.49 | 0.00 | 0.00 | 0.00 | 1.28 | 1.65 | 0.41 | 0.12 | 0.05 | 1.17 | 5.40 | |||||||||||||
1962 | 1.42 | 0.69 | 0.37 | 0.00 | 0.00 | 0.16 | 0.50 | 0.35 | 0.70 | 0.00 | 0.03 | 0.33 | 4.55 | |||||||||||||
1963 | 0.56 | 0.67 | 0.30 | 0.00 | 0.00 | 0.00 | 0.02 | 2.51 | 0.56 | 1.66 | 0.65 | 0.00 | 6.93 | |||||||||||||
1964 | 0.26 | 0.04 | 0.43 | 0.11 | 0.08 | 0.00 | 0.68 | ----- | z | ----- | z | ----- | z | 0.39 | 1.23 | 3.22 | c | |||||||||
1965 | 1.83 | 0.98 | 1.17 | 1.90 | 0.26 | 1.50 | 0.44 | 1.02 | 0.51 | 0.18 | 0.90 | 3.44 | 14.13 | |||||||||||||
1966 | 0.42 | 1.22 | 0.26 | 0.00 | 0.00 | 0.60 | 0.16 | 2.31 | 1.60 | 0.20 | 0.43 | 0.42 | 7.62 | |||||||||||||
1967 | 0.26 | 0.00 | 0.50 | 0.09 | 0.04 | 0.65 | 0.72 | 0.25 | 0.40 | 0.54 | 1.42 | 4.40 | 9.27 | |||||||||||||
1968 | 0.19 | 1.55 | 1.52 | 0.00 | 0.00 | 0.00 | 1.13 | 0.66 | 0.00 | 0.32 | 0.97 | 0.76 | 7.10 | |||||||||||||
1969 | 1.44 | 1.01 | 0.31 | 0.14 | 0.36 | 0.00 | 0.47 | 0.64 | 1.19 | 0.06 | 1.23 | 0.51 | 7.36 | |||||||||||||
1970 | 0.00 | 0.40 | 2.55 | 0.00 | 0.00 | 0.00 | 1.64 | 3.64 | 2.72 | 0.20 | 0.00 | 0.10 | 11.25 | |||||||||||||
1971 | 0.29 | 0.49 | 0.00 | 0.20 | 0.00 | 0.00 | 0.35 | 2.87 | 0.95 | 0.62 | 0.00 | 0.58 | 6.35 | |||||||||||||
1972 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.87 | 0.86 | 1.21 | 0.21 | 4.51 | ----- | z | 1.67 | 10.33 | a | |||||||||||
1973 | 0.25 | 1.45 | 2.18 | 0.11 | 0.26 | 0.00 | 0.13 | 0.02 | 0.00 | 0.00 | 1.60 | 0.00 | 6.00 | |||||||||||||
1974 | 0.83 | 0.02 | 1.85 | 0.00 | 0.00 | 0.00 | 1.55 | 1.42 | 1.16 | 2.46 | 0.47 | 0.64 | 10.40 | |||||||||||||
1975 | 0.07 | 0.36 | 0.69 | 0.56 | 0.00 | 0.00 | 0.34 | 0.02 | 0.49 | 0.35 | 0.48 | 0.82 | 4.18 | |||||||||||||
1976 | 0.00 | 0.65 | 0.30 | 0.60 | 1.43 | 0.00 | 1.83 | 1.83 | 1.54 | 1.10 | 0.52 | 0.68 | 10.48 | |||||||||||||
1977 | 0.63 | 0.06 | 0.28 | 0.06 | 0.45 | 0.05 | 0.55 | 0.03 | 0.66 | 0.52 | 0.02 | 0.70 | 4.01 | |||||||||||||
1978 | 3.15 | 2.76 | 1.93 | 0.30 | 0.00 | 0.02 | 0.55 | 1.65 | 0.00 | 0.70 | 2.12 | 2.38 | 15.56 | |||||||||||||
1979 | 2.82 | 0.30 | 1.95 | 0.00 | 0.68 | 0.12 | 0.28 | 1.72 | 0.16 | 0.16 | 0.19 | 0.12 | 8.50 | |||||||||||||
1980 | 1.85 | 2.36 | 1.05 | 0.64 | 0.33 | 0.00 | 0.50 | 0.35 | 0.25 | 0.02 | 0.00 | 0.03 | 7.38 | |||||||||||||
1981 | 1.05 | 0.98 | 1.32 | 0.28 | 0.10 | 0.00 | 1.57 | 0.16 | 0.05 | 0.75 | 0.73 | 0.00 | 6.99 | |||||||||||||
1982 | 0.70 | 0.59 | 1.98 | 0.00 | 0.83 | 0.00 | 0.55 | 2.11 | 0.53 | 0.00 | 1.62 | 1.95 | 10.86 | |||||||||||||
1983 | 0.69 | 1.28 | 3.23 | 0.21 | 0.00 | 0.00 | 0.36 | 1.56 | 3.36 | 0.74 | 0.07 | 0.95 | 12.45 | |||||||||||||
1984 | 0.35 | 0.00 | 0.00 | 1.65 | 0.05 | 0.21 | 3.83 | 0.68 | 2.88 | 0.23 | 0.76 | 3.08 | 13.72 | |||||||||||||
1985 | 0.82 | 0.50 | 0.43 | 0.23 | 0.00 | 0.00 | 1.37 | 0.20 | 1.05 | 1.11 | 1.61 | 0.93 | 8.25 | |||||||||||||
1986 | 0.10 | 1.41 | 2.12 | 0.00 | 0.00 | 0.00 | 1.86 | 0.42 | 0.49 | 0.61 | 0.07 | 0.91 | 7.99 | |||||||||||||
1987 | 0.52 | 2.29 | 0.24 | 0.10 | 0.19 | 0.00 | 0.55 | 0.51 | 0.36 | 0.52 | 1.24 | 1.87 | 8.39 | |||||||||||||
1988 | 0.91 | 0.25 | 0.17 | 1.15 | 0.00 | 0.06 | 0.41 | 0.91 | a | 0.04 | 1.93 | 0.98 | ----- | z | 6.81 | a | ||||||||||
1989 | 1.05 | 0.00 | 1.46 | 0.00 | 0.00 | 0.00 | 0.54 | 0.92 | 1.03 | 0.52 | 0.18 | 0.36 | 6.06 | |||||||||||||
1990 | 0.73 | 0.74 | 0.38 | 0.10 | 0.19 | 0.05 | 0.98 | 4.47 | 1.73 | 0.08 | 0.19 | 0.86 | 10.50 | |||||||||||||
1991 | 0.80 | 0.67 | 2.33 | 0.00 | 0.00 | 0.00 | 0.23 | 0.40 | 1.24 | 1.28 | 1.36 | 1.19 | 9.50 | |||||||||||||
1992 | 1.53 | 1.38 | 3.07 | 0.37 | 0.88 | 0.02 | 2.10 | 1.30 | 0.05 | 0.40 | 0.07 | 3.23 | 14.40 | |||||||||||||
1993 | 5.05 | 1.96 | 1.01 | a | 0.00 | 0.12 | 0.00 | 0.00 | 1.24 | b | 0.00 | 1.57 | 3.36 | 0.00 | 14.31 | |||||||||||
1994 | 0.11 | 0.76 | 2.01 | 0.12 | 0.30 | 0.00 | 0.33 | 0.02 | 1.50 | 0.50 | 0.57 | 3.27 | 9.49 | |||||||||||||
1995 | 1.23 | 0.93 | 1.47 | 0.34 | 0.03 | 0.00 | 0.00 | 1.53 | 1.38 | 0.00 | 2.05 | 0.08 | 9.04 | |||||||||||||
1996 | 0.04 | 0.56 | 0.57 | 0.00 | 0.00 | 0.00 | 1.06 | 0.19 | 0.48 | f | 0.21 | 0.14 | 0.05 | 2.82 | a | |||||||||||
1997 | 1.28 | 0.50 | 0.00 | 0.34 | 0.00 | 0.00 | 0.11 | 1.02 | 0.93 | 0.22 | 0.11 | 1.12 | 5.63 | |||||||||||||
1998 | 0.70 | 4.34 | 2.15 | 0.49 | 0.04 | 0.00 | 1.26 | 0.07 | 1.15 | 0.99 | 0.31 | 0.27 | 11.77 | |||||||||||||
1999 | 0.03 | 0.44 | 0.15 | 1.45 | 0.00 | 0.00 | 2.65 | 0.78 | 0.95 | 0.00 | 0.00 | 0.00 | 6.45 | |||||||||||||
2000 | 0.00 | 0.00 | 3.02 | 0.00 | 0.00 | 0.32 | 0.23 | 0.65 | 0.00 | 3.44 | 0.78 | 0.00 | 8.44 | |||||||||||||
2001 | 2.24 | 1.08 | 0.73 | 1.07 | 0.07 | 0.21 | 1.03 | 0.55 | 0.00 | 0.07 | 0.22 | 1.05 | 8.32 | |||||||||||||
2002 | 0.10 | 0.00 | 0.17 | 0.03 | 0.00 | 0.00 | 0.38 | 0.00 | 0.55 | 0.25 | 0.44 | 0.05 | 1.97 | |||||||||||||
2003 | 0.60 | 2.76 | 0.90 | 0.19 | 0.00 | 0.00 | 0.70 | 0.74 | 0.41 | 0.32 | 0.85 | 0.23 | 7.70 | |||||||||||||
2004 | 0.32 | 1.04 | 0.07 | 0.80 | 0.00 | 0.00 | 0.27 | 1.09 | 0.20 | 0.98 | 0.86 | 1.66 | 7.29 | |||||||||||||
2005 | 1.68 | 3.51 | 0.69 | 0.19 | 0.00 | 0.06 | 0.04 | 0.08 | 0.57 | 0.28 | 0.00 | 0.00 | 7.10 | |||||||||||||
2006 | 0.00 | 0.00 | 1.59 | 0.01 | 0.00 | 0.09 | 0.81 | 2.21 | 0.37 | 1.42 | 0.00 | 0.80 | 7.30 | |||||||||||||
2007 | 0.43 | 0.62 | 0.88 | 0.18 | 0.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.11 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.84 | 0.86 | 0.91 | 0.33 | 0.14 | 0.11 | 0.81 | 1.13 | 0.77 | 0.58 | 0.61 | 0.96 | 8.06 | |||||||||||||
S.D. | 0.88 | 0.88 | 0.92 | 0.53 | 0.28 | 0.29 | 0.73 | 1.11 | 0.88 | 0.78 | 0.79 | 1.03 | 3.05 | |||||||||||||
SKEW | 1.78 | 1.57 | 1.13 | 2.16 | 2.55 | 4.34 | 1.66 | 1.56 | 1.89 | 2.53 | 1.88 | 1.24 | 0.38 | |||||||||||||
MAX | 5.05 | 4.34 | 3.96 | 2.60 | 1.43 | 1.87 | 3.83 | 5.53 | 4.74 | 4.51 | 3.72 | 4.40 | 15.56 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.97 | |||||||||||||
YRS | 89 | 90 | 87 | 91 | 87 | 89 | 87 | 89 | 88 | 87 | 86 | 85 | 64 |