YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | 0.10 | 0.00 | 0.48 | 1.25 | a | 0.43 | 0.66 | 0.96 | 0.39 | 0.23 | 0.57 | 0.45 | 0.25 | b | 1.25 | c | ||||||||||
1915 | 0.10 | a | 1.00 | 0.50 | 0.56 | 1.60 | 2.97 | 0.89 | 0.18 | 0.65 | 0.31 | 0.22 | 0.30 | 2.97 | a | |||||||||||
1916 | 0.60 | 0.20 | 0.30 | 1.53 | 1.17 | 2.10 | 1.50 | 0.93 | 0.91 | 0.50 | ----- | z | 0.15 | ----- | z | |||||||||||
1917 | 0.10 | ----- | z | 1.10 | 0.60 | 0.00 | 0.50 | 1.35 | 0.65 | 0.76 | 0.10 | 0.20 | 0.50 | ----- | z | |||||||||||
1918 | 0.10 | 0.02 | 0.03 | b | 1.00 | 1.65 | 0.75 | 0.55 | x | 2.25 | 0.04 | 0.40 | 0.60 | 0.20 | ----- | z | ||||||||||
1919 | 0.30 | b | 0.20 | 0.50 | 0.80 | 0.93 | 0.78 | 1.30 | 1.05 | 0.65 | 0.30 | 1.50 | 0.30 | 1.50 | b | |||||||||||
1920 | 0.40 | 0.20 | 0.02 | 0.60 | 0.74 | 1.40 | 0.90 | 0.40 | 0.81 | 0.24 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | 0.26 | a | ----- | z | 0.54 | 1.34 | ----- | z | 0.33 | 0.05 | 0.08 | ----- | z | |||||
1942 | 0.06 | 0.10 | 1.47 | 0.45 | 0.92 | 0.46 | ----- | z | ----- | z | 0.30 | 0.14 | 0.20 | 0.21 | a | ----- | z | |||||||||
1943 | 0.07 | 0.35 | 0.30 | 1.05 | 0.60 | b | 1.47 | 0.57 | 0.84 | ----- | z | 0.50 | 0.13 | 0.11 | ----- | z | ||||||||||
1944 | 0.10 | ----- | z | 0.20 | 0.35 | 0.60 | 0.72 | 1.28 | 2.25 | 0.42 | 0.00 | 1.15 | 0.00 | ----- | z | |||||||||||
1945 | 0.12 | 0.10 | 0.72 | 0.55 | 1.00 | 0.35 | 1.35 | 1.10 | 0.72 | 0.00 | 0.02 | 0.30 | 1.35 | |||||||||||||
1946 | 0.14 | 0.34 | 0.68 | 0.58 | 0.55 | 1.24 | 1.06 | 0.55 | 1.60 | 1.00 | 0.06 | 0.32 | 1.60 | |||||||||||||
1947 | 0.42 | 0.16 | 0.10 | 0.75 | 0.75 | 1.67 | 0.20 | 1.13 | 1.30 | 0.47 | 0.60 | 0.22 | 1.67 | |||||||||||||
1948 | 0.20 | 0.75 | ----- | z | 1.02 | 0.72 | 0.63 | v | 1.17 | 1.17 | 0.55 | 0.70 | 0.27 | 0.05 | ----- | z | ||||||||||
1949 | 0.15 | 0.03 | 0.10 | 0.18 | 0.90 | 0.52 | 1.85 | 0.42 | 0.57 | a | 1.57 | 0.35 | 0.85 | 1.85 | a | |||||||||||
1950 | 0.80 | j | 0.14 | 1.50 | 1.00 | 1.10 | 2.00 | 0.67 | 0.39 | 0.87 | 0.13 | b | 0.03 | 0.20 | 2.00 | l | ||||||||||
1951 | 0.29 | 0.11 | 0.30 | 0.21 | 0.30 | 1.06 | 1.20 | 1.50 | 0.43 | 0.14 | 0.10 | 0.22 | f | 1.50 | f | |||||||||||
1952 | 0.22 | 0.12 | 0.14 | 0.50 | 0.19 | 0.52 | 2.50 | 0.86 | a | 0.29 | 0.00 | 0.95 | 0.10 | 2.50 | a | |||||||||||
1953 | 0.07 | 0.03 | 0.01 | 0.53 | 0.99 | 2.75 | 0.62 | 0.86 | 0.36 | 0.46 | 0.24 | 0.17 | 2.75 | |||||||||||||
1954 | 0.11 | 0.10 | 0.20 | 0.63 | 0.74 | 1.03 | 0.93 | 0.67 | 0.91 | 0.06 | 0.15 | 0.11 | 1.03 | |||||||||||||
1955 | 0.03 | 0.07 | 0.09 | 0.14 | 0.65 | 1.28 | 0.83 | 0.33 | 0.61 | 0.01 | 0.15 | 0.10 | 1.28 | |||||||||||||
1956 | 0.15 | 0.24 | 0.39 | 0.31 | 0.68 | 1.58 | 0.97 | 0.83 | 0.52 | 0.82 | 0.66 | 0.09 | 1.58 | |||||||||||||
1957 | 0.08 | 0.07 | 0.01 | a | 0.51 | 0.80 | 1.46 | 2.20 | 0.70 | 3.95 | 0.40 | 0.40 | 0.10 | 3.95 | a | |||||||||||
1958 | 0.10 | 0.23 | 0.01 | 0.32 | 0.33 | 1.11 | 1.01 | 0.71 | 0.25 | 0.41 | 0.31 | 0.01 | 1.11 | |||||||||||||
1959 | 0.13 | 0.07 | 0.02 | 0.40 | 0.85 | 0.75 | 0.60 | 1.04 | 0.41 | 1.60 | 0.33 | 0.14 | 1.60 | |||||||||||||
1960 | 0.22 | 0.25 | 0.07 | 0.38 | 0.92 | 1.03 | 0.92 | 1.84 | 0.60 | 0.80 | 0.20 | 0.42 | 1.84 | |||||||||||||
1961 | 0.00 | 0.05 | 0.38 | 0.51 | 0.75 | 0.38 | 0.56 | 0.98 | 1.25 | 1.49 | 0.02 | 0.06 | 1.49 | |||||||||||||
1962 | 0.12 | 0.31 | 0.15 | 0.19 | 1.44 | 0.63 | 2.00 | 1.55 | 4.86 | 0.15 | 0.28 | 0.04 | 4.86 | |||||||||||||
1963 | 0.02 | 0.12 | 0.05 | 0.61 | 0.30 | 0.61 | 1.06 | 1.90 | 0.22 | 0.10 | 0.08 | 0.13 | 1.90 | |||||||||||||
1964 | 0.07 | 0.09 | 0.20 | 1.03 | 0.34 | 1.62 | 0.93 | 3.35 | 0.46 | 0.04 | 0.16 | 0.26 | 3.35 | |||||||||||||
1965 | 0.09 | 0.05 | 0.05 | 1.01 | 0.80 | 0.98 | 1.85 | 0.80 | 1.15 | 0.99 | 0.23 | 0.31 | 1.85 | |||||||||||||
1966 | 0.08 | 0.27 | 0.64 | c | 0.43 | 0.38 | 1.18 | 0.85 | 0.94 | 0.52 | 0.39 | 0.13 | 0.20 | 1.18 | c | |||||||||||
1967 | 0.21 | 0.23 | 0.19 | 1.22 | 0.76 | 1.37 | 0.37 | 0.09 | 0.80 | 0.71 | 0.02 | 0.24 | 1.37 | |||||||||||||
1968 | 0.17 | 0.04 | 0.29 | 0.76 | 1.06 | 2.45 | 1.21 | 0.70 | 0.68 | 0.51 | 0.16 | 0.21 | 2.45 | |||||||||||||
1969 | 0.34 | 0.08 | 0.34 | 0.77 | 0.69 | 2.07 | 1.29 | 0.70 | 2.27 | 0.54 | 0.05 | 0.15 | 2.27 | |||||||||||||
1970 | 0.06 | 0.07 | 0.69 | 0.60 | 1.14 | 1.95 | 1.24 | 0.24 | 0.80 | 0.54 | 0.21 | 0.09 | 1.95 | |||||||||||||
1971 | 0.20 | 0.20 | 0.13 | 0.75 | 1.20 | 2.03 | 0.42 | 0.51 | 0.87 | 1.04 | 0.25 | 0.10 | 2.03 | |||||||||||||
1972 | 0.33 | 0.18 | 0.19 | 0.64 | 0.78 | 0.41 | 1.41 | 2.15 | 0.83 | 0.43 | 0.05 | 0.52 | 2.15 | |||||||||||||
1973 | 0.02 | 0.12 | 1.10 | 0.47 | 0.87 | 0.16 | 0.42 | 1.13 | 1.66 | 0.93 | 0.45 | 0.12 | 1.66 | |||||||||||||
1974 | 0.15 | 0.15 | 0.19 | 0.99 | 0.53 | 0.38 | 1.28 | 0.58 | 0.45 | 0.43 | 0.84 | 0.13 | 1.28 | |||||||||||||
1975 | 0.21 | 0.17 | 0.53 | 0.62 | 0.70 | 1.38 | 0.25 | 0.41 | 0.68 | 0.28 | 0.19 | 0.11 | 1.38 | |||||||||||||
1976 | 0.30 | 0.23 | 0.48 | 0.35 | 0.12 | 1.80 | 0.65 | 0.02 | 0.11 | 0.18 | 0.15 | 0.11 | a | 1.80 | a | |||||||||||
1977 | 0.25 | 0.47 | 0.69 | 0.33 | 1.85 | 0.82 | 0.68 | 0.47 | 2.07 | 1.02 | 1.03 | 0.27 | 2.07 | |||||||||||||
1978 | 0.10 | 0.02 | 0.03 | 0.34 | 0.40 | b | 1.31 | 1.39 | 1.33 | 0.69 | 0.12 | 0.10 | 0.27 | 1.39 | b | |||||||||||
1979 | 0.27 | 0.23 | 0.51 | a | 1.15 | d | 0.78 | 1.15 | 1.25 | 1.41 | 0.21 | 0.85 | 0.06 | h | 0.18 | 1.41 | m | |||||||||
1980 | 0.06 | a | 0.18 | b | 0.18 | 0.00 | 0.45 | 0.77 | 0.83 | 3.08 | 0.62 | 0.42 | 0.19 | 0.11 | 3.08 | c | ||||||||||
1981 | 0.10 | 0.15 | 0.47 | 0.38 | 0.54 | 0.97 | 1.32 | 0.30 | 1.20 | 0.77 | 0.20 | 0.22 | 1.32 | |||||||||||||
1982 | 0.09 | 0.05 | 0.51 | a | 0.24 | 0.53 | 0.95 | 1.26 | a | 0.50 | 0.36 | 2.93 | 0.30 | 0.22 | a | 2.93 | c | |||||||||
1983 | 0.55 | 0.37 | 0.67 | b | ----- | z | 0.53 | a | 1.52 | 0.65 | 0.57 | 1.35 | 0.50 | 0.08 | b | 0.13 | b | ----- | z | |||||||
1984 | 0.30 | ----- | z | 0.27 | b | 0.75 | 0.20 | 0.93 | t | 0.94 | 0.42 | 0.20 | 1.13 | 0.10 | 0.28 | a | ----- | z | ||||||||
1985 | 0.06 | a | 0.00 | 0.24 | 0.45 | 1.00 | 0.75 | a | 0.73 | 1.03 | 0.61 | 0.49 | 0.32 | a | 0.04 | c | 1.03 | f | ||||||||
1986 | 0.08 | 0.00 | c | 0.00 | 1.22 | 0.57 | 1.07 | c | 0.75 | 0.62 | 0.46 | 0.19 | 1.46 | 0.05 | 1.46 | f | ||||||||||
1987 | 0.18 | 0.17 | 0.40 | 0.04 | 2.31 | 0.44 | a | 1.37 | 1.25 | 0.56 | 0.06 | 0.25 | 0.19 | 2.31 | a | |||||||||||
1988 | 0.14 | 0.12 | 0.34 | 0.00 | 0.28 | 0.49 | 0.89 | 0.74 | 1.57 | 0.13 | 0.32 | 0.30 | 1.57 | |||||||||||||
1989 | 0.29 | 0.09 | 0.58 | 0.10 | 1.10 | 0.35 | 0.22 | 4.36 | 0.69 | 0.09 | 0.13 | 0.08 | 4.36 | |||||||||||||
1990 | 0.00 | 0.05 | 0.58 | 0.62 | 0.57 | 1.36 | 0.46 | g | 0.68 | 0.92 | 0.21 | 0.00 | 0.15 | 1.36 | g | |||||||||||
1991 | 0.15 | 0.31 | 0.07 | 1.21 | 1.41 | 1.09 | 1.00 | 0.65 | 1.47 | 1.76 | 0.09 | 0.20 | 1.76 | |||||||||||||
1992 | 0.35 | 0.14 | 0.55 | 0.17 | 0.52 | 1.36 | 0.62 | 0.95 | 2.09 | 0.09 | 0.40 | a | 0.14 | 2.09 | a | |||||||||||
1993 | 0.37 | 0.15 | 0.25 | 0.12 | 0.65 | 1.01 | 2.25 | c | 0.85 | 0.29 | 0.00 | 0.21 | 0.71 | 2.25 | c | |||||||||||
1994 | 0.24 | 0.11 | a | 0.12 | 1.04 | 0.51 | 1.84 | 2.46 | 2.90 | 3.32 | 0.60 | 0.59 | 0.06 | 3.32 | a | |||||||||||
1995 | 0.27 | 0.13 | 0.64 | 0.29 | 0.85 | 0.51 | 1.75 | 2.03 | 1.59 | 1.19 | 0.40 | 0.54 | a | 2.03 | a | |||||||||||
1996 | 0.29 | a | 0.43 | 0.16 | b | 0.00 | 0.77 | 0.86 | 1.41 | 0.53 | 3.01 | 0.76 | 0.43 | 0.49 | a | 3.01 | d | |||||||||
1997 | 0.42 | 0.13 | 0.52 | 0.37 | 0.76 | 1.24 | 0.74 | 0.81 | 0.73 | 0.80 | c | 0.18 | 0.13 | 1.24 | c | |||||||||||
1998 | 0.26 | 0.59 | 0.07 | 0.36 | 0.88 | 1.22 | 0.58 | 1.10 | 0.36 | 2.19 | 0.67 | 0.08 | 2.19 | |||||||||||||
1999 | 0.30 | 0.00 | 0.18 | 0.42 | 1.61 | 0.35 | 1.03 | 0.60 | 1.37 | 0.10 | 0.00 | 0.06 | 1.61 | |||||||||||||
2000 | 0.11 | 1.59 | 0.43 | b | 0.28 | 0.91 | 2.23 | 0.81 | c | 1.94 | c | 0.76 | 1.00 | 0.61 | a | 0.13 | 2.23 | i | ||||||||
2001 | 0.22 | a | 0.22 | 0.02 | 0.62 | 1.58 | 0.39 | 0.83 | 0.88 | a | 0.67 | 0.51 | 0.14 | 0.07 | 1.58 | b | ||||||||||
2002 | 0.08 | a | 0.03 | 0.20 | a | 0.50 | a | 0.41 | a | 0.67 | b | 2.80 | e | 1.19 | b | 1.69 | 0.40 | 0.26 | 0.28 | 2.80 | m | |||||
2003 | 0.50 | a | 0.08 | 0.20 | 0.27 | 1.44 | 0.72 | 0.84 | 0.64 | 2.02 | 0.30 | a | 0.00 | f | 0.31 | 2.02 | h | |||||||||
2004 | 0.21 | 0.08 | 0.91 | 0.37 | 2.00 | 0.79 | 1.22 | c | 0.76 | 1.19 | 1.54 | 0.22 | 0.33 | 2.00 | c | |||||||||||
2005 | 0.28 | 0.11 | 0.04 | 0.44 | 1.71 | 1.32 | 0.81 | f | 1.78 | k | 0.92 | b | 0.79 | b | 0.31 | a | 0.32 | 1.78 | v | |||||||
2006 | 0.50 | 0.14 | b | 0.97 | 0.39 | a | 0.44 | 0.32 | a | 0.57 | 1.01 | 0.77 | 0.69 | e | 0.04 | 1.02 | a | 1.02 | j | |||||||
2007 | 0.00 | 0.62 | c | 0.34 | d | 0.62 | a | 1.47 | b | 2.01 | a | 2.05 | 0.73 | 1.02 | 0.76 | 0.00 | a | 0.34 | d | 2.05 | p | |||||
2008 | 0.00 | 0.15 | x | 0.29 | 0.06 | b | 0.40 | 1.47 | a | 1.06 | j | 0.66 | e | 1.01 | g | 1.29 | e | 0.73 | c | 0.34 | a | ----- | z | |||
2009 | 0.16 | 0.50 | m | 0.49 | q | 0.61 | a | 0.49 | b | 1.29 | a | 0.21 | b | 0.55 | a | 1.31 | 1.73 | 0.18 | 0.33 | a | ----- | z | ||||
2010 | 0.19 | g | 0.32 | a | 0.48 | 1.23 | a | 3.69 | c | 0.72 | b | 1.13 | 2.23 | a | 1.59 | 0.00 | ----- | z | ----- | z | ----- | z | ||||
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.19 | 0.20 | 0.36 | 0.56 | 0.86 | 1.12 | 1.08 | 1.04 | 1.00 | 0.60 | 0.31 | 0.22 | 2.06 | |||||||||||||
S.D. | 0.14 | 0.24 | 0.33 | 0.35 | 0.56 | 0.61 | 0.56 | 0.78 | 0.86 | 0.56 | 0.32 | 0.18 | 0.83 | |||||||||||||
SKEW | 0.93 | 3.44 | 1.44 | 0.60 | 2.07 | 0.79 | 0.97 | 1.91 | 2.27 | 1.59 | 1.95 | 2.08 | 1.45 | |||||||||||||
MAX | 0.60 | 1.59 | 1.50 | 1.53 | 3.69 | 2.97 | 2.80 | 4.36 | 4.86 | 2.93 | 1.50 | 1.02 | 4.86 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.16 | 0.20 | 0.02 | 0.04 | 0.00 | 0.00 | 0.00 | 1.03 | |||||||||||||
YRS | 74 | 71 | 74 | 75 | 77 | 74 | 72 | 75 | 74 | 77 | 72 | 74 | 51 |