YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | 0.00 | 0.17 | 0.09 | 0.05 | 0.00 | 0.23 | 0.93 | 0.67 | 0.79 | 0.65 | 0.07 | ----- | z | |||||||||||
1940 | 0.55 | 0.41 | 0.06 | 0.00 | 0.65 | 0.59 | 0.39 | 0.12 | 0.10 | 0.36 | 0.31 | 0.25 | 0.65 | |||||||||||||
1941 | 0.16 | 0.26 | 1.59 | 0.41 | a | 0.51 | 0.26 | 0.70 | a | 0.68 | a | 1.80 | 0.61 | 0.43 | 0.38 | 1.80 | c | |||||||||
1942 | 0.07 | 0.39 | 0.00 | 0.20 | 0.00 | 0.08 | 0.43 | 0.91 | 0.27 | 0.48 | 0.00 | 0.99 | a | 0.99 | a | |||||||||||
1943 | 0.02 | 0.00 | 0.00 | 0.00 | 0.04 | 0.73 | 0.32 | 0.12 | 1.00 | 0.00 | 0.48 | 0.44 | 1.00 | |||||||||||||
1944 | 0.20 | 0.20 | 0.10 | 0.00 | 0.59 | 0.46 | 0.75 | 0.77 | 1.16 | 0.90 | 0.21 | 0.55 | 1.16 | |||||||||||||
1945 | 0.12 | 0.01 | 0.53 | 0.28 | 0.00 | 0.04 | 0.21 | 0.15 | 0.00 | 1.59 | 0.00 | 0.00 | 1.59 | |||||||||||||
1946 | 0.25 | 0.00 | 0.03 | 0.25 | 0.45 | 0.17 | 0.14 | 0.13 | 0.59 | ----- | z | 0.11 | 0.81 | ----- | z | |||||||||||
1947 | 0.35 | 0.00 | 0.17 | 0.01 | 0.29 | 0.67 | 0.04 | 0.76 | 0.00 | 0.35 | 0.28 | 0.50 | 0.76 | |||||||||||||
1948 | 0.20 | 0.52 | 0.00 | 0.00 | 0.03 | 0.72 | 0.46 | 0.70 | 0.00 | 0.27 | 0.00 | 0.48 | 0.72 | |||||||||||||
1949 | 0.80 | 0.15 | 0.00 | 0.12 | 0.45 | 0.34 | 0.51 | 0.36 | 0.54 | 0.82 | 0.00 | 0.46 | 0.82 | |||||||||||||
1950 | 0.43 | 0.31 | 0.00 | 0.00 | 0.00 | 0.00 | 1.40 | 0.00 | 0.64 | 0.37 | 0.00 | 0.00 | 1.40 | |||||||||||||
1951 | 0.28 | 0.50 | 0.32 | 0.00 | 0.00 | 0.06 | 0.62 | 0.98 | 0.00 | 0.50 | 0.00 | 0.45 | 0.98 | |||||||||||||
1952 | 0.00 | 0.32 | 0.49 | 0.86 | 0.31 | 0.66 | 1.25 | 0.80 | 0.00 | 0.00 | 0.00 | 0.40 | 1.25 | |||||||||||||
1953 | 0.00 | 0.10 | 0.23 | 0.70 | 0.28 | 0.27 | 0.98 | 0.08 | 0.00 | 0.45 | 0.00 | 0.10 | 0.98 | |||||||||||||
1954 | 0.05 | 0.00 | 0.06 | 0.00 | 0.31 | 0.14 | 0.24 | 1.10 | 0.28 | a | 0.34 | 0.00 | 0.00 | 1.10 | a | |||||||||||
1955 | 0.31 | 0.03 | 0.10 | 0.00 | 0.07 | 0.10 | 0.61 | 1.35 | 0.11 | 0.48 | 0.00 | 0.15 | 1.35 | |||||||||||||
1956 | 0.35 | 0.33 | 0.00 | 0.02 | 0.00 | 0.46 | 0.28 | 0.29 | 0.12 | 0.00 | 0.00 | 0.09 | 0.46 | |||||||||||||
1957 | 0.15 | 0.25 | 0.07 | 0.04 | 0.07 | 0.02 | 0.58 | 0.58 | 0.38 | 0.88 | 0.38 | 0.00 | 0.88 | |||||||||||||
1958 | 0.32 | 0.91 | 0.62 | 0.14 | 0.36 | 1.17 | 0.54 | 0.57 | 2.35 | 1.14 | 0.07 | 0.00 | 2.35 | |||||||||||||
1959 | 0.08 | 0.00 | 0.06 | 0.01 | 0.03 | 0.34 | 0.28 | 0.82 | 0.04 | 0.23 | 0.13 | 0.17 | 0.82 | |||||||||||||
1960 | 0.52 | 0.16 | 0.04 | 0.00 | 0.00 | 0.50 | 1.00 | 0.38 | 0.09 | 0.82 | 0.04 | 0.54 | 1.00 | |||||||||||||
1961 | 0.36 | 0.00 | 0.19 | 0.00 | 0.00 | 0.03 | 0.24 | 0.60 | 0.36 | 0.08 | 0.29 | 0.34 | 0.60 | |||||||||||||
1962 | 0.32 | 0.44 | 0.06 | 0.04 | 0.00 | 0.00 | 0.47 | 0.06 | 1.86 | 0.50 | 0.17 | 0.04 | 1.86 | |||||||||||||
1963 | 0.07 | 0.30 | 0.00 | 0.00 | 0.00 | 0.04 | 0.38 | 0.41 | 1.20 | 0.52 | 0.45 | 0.07 | 1.20 | |||||||||||||
1964 | 0.03 | 0.00 | 0.53 | 0.04 | 0.01 | 0.00 | 0.45 | 0.77 | 0.18 | 0.32 | 0.00 | 0.36 | 0.77 | |||||||||||||
1965 | 0.06 | 0.35 | 0.05 | 0.00 | 0.03 | 0.31 | 0.05 | 1.00 | 1.66 | 0.16 | 0.00 | 0.24 | 1.66 | |||||||||||||
1966 | 0.16 | 0.14 | 0.06 | 1.12 | 0.40 | 1.62 | 0.59 | 1.30 | 0.75 | 0.01 | 0.06 | 0.06 | 1.62 | |||||||||||||
1967 | 0.00 | 0.06 | 0.06 | 0.02 | 0.22 | 0.75 | 0.81 | 0.12 | 0.21 | 0.00 | 0.13 | 0.49 | 0.81 | |||||||||||||
1968 | 0.28 | 0.31 | 0.45 | 0.07 | 0.04 | 0.03 | 3.08 | 1.11 | 0.30 | 0.05 | 0.91 | 0.33 | 3.08 | |||||||||||||
1969 | 0.05 | 0.14 | 0.12 | 0.00 | 0.36 | 0.02 | 0.55 | 0.68 | 0.42 | 0.25 | 0.72 | 0.36 | 0.72 | |||||||||||||
1970 | 0.00 | 0.29 | 0.28 | 0.00 | 0.08 | 0.14 | 0.48 | 0.80 | 0.44 | 0.38 | 0.00 | 0.02 | 0.80 | |||||||||||||
1971 | 0.08 | 0.00 | 0.00 | 0.30 | 0.35 | 0.18 | 0.57 | 0.28 | 0.34 | 0.31 | 0.14 | ----- | z | ----- | z | |||||||||||
1972 | 0.15 | 0.04 | 0.00 | 0.00 | 0.03 | 1.10 | 0.55 | 1.68 | 1.13 | 0.61 | 0.53 | 0.11 | 1.68 | |||||||||||||
1973 | 0.59 | 0.80 | 0.12 | 0.00 | 0.31 | 0.13 | 1.35 | 0.05 | 0.00 | 0.04 | 0.02 | 0.00 | 1.35 | |||||||||||||
1974 | 0.13 | 0.00 | 0.00 | 0.00 | 0.27 | 0.06 | 0.70 | 0.28 | 3.30 | 0.62 | 0.32 | 0.79 | 3.30 | |||||||||||||
1975 | 0.23 | 0.41 | 0.12 | 0.00 | 0.02 | 0.00 | 0.40 | 0.20 | 1.87 | 0.09 | 0.00 | 0.48 | 1.87 | |||||||||||||
1976 | 0.25 | 0.27 | 0.00 | 0.20 | 0.60 | 0.49 | 0.70 | 0.29 | 0.53 | 0.56 | 0.37 | b | 0.28 | 0.70 | b | |||||||||||
1977 | 0.36 | 0.00 | 0.45 | 0.22 | 0.02 | 0.31 | 0.97 | 0.69 | 0.77 | 1.58 | 0.03 | 0.18 | 1.58 | |||||||||||||
1978 | 0.19 | 0.19 | 0.03 | 0.00 | 0.33 | 0.63 | 0.22 | 1.12 | 1.58 | 1.08 | 0.51 | 0.07 | 1.58 | |||||||||||||
1979 | 0.27 | 0.40 | 0.00 | 0.16 | 0.24 | 0.09 | 0.44 | 0.89 | 0.31 | 0.00 | 0.00 | 0.12 | 0.89 | |||||||||||||
1980 | 0.20 | 0.28 | 0.08 | 0.21 | 0.04 | 0.00 | 0.28 | 0.45 | 1.39 | 0.44 | 0.30 | 0.03 | 1.39 | |||||||||||||
1981 | 0.41 | 0.17 | 0.11 | 0.67 | 0.70 | 0.07 | 0.33 | 1.18 | 0.25 | 0.78 | 0.15 | 0.04 | 1.18 | |||||||||||||
1982 | 0.21 | a | 0.34 | 0.00 | 0.07 | 0.16 | 0.11 | 0.34 | 0.26 | 0.27 | 2.26 | 0.23 | 0.80 | 2.26 | a | |||||||||||
1983 | 0.70 | 0.53 | 0.17 | 0.60 | 0.19 | 0.25 | 0.15 | 0.57 | 0.38 | 1.15 | 0.21 | 0.05 | 1.15 | |||||||||||||
1984 | 0.20 | b | 0.00 | 0.53 | 0.00 | 0.10 | 0.78 | 0.29 | 1.47 | 0.55 | 1.23 | c | 0.37 | 0.43 | 1.47 | e | ||||||||||
1985 | 0.29 | 0.09 | 0.23 | 0.08 | 0.01 | 0.32 | 1.90 | 0.65 | 0.91 | 0.84 | 0.16 | 0.00 | 1.90 | |||||||||||||
1986 | 0.00 | 0.20 | 0.29 | c | 0.02 | 0.52 | 0.77 | 0.86 | 0.85 | 0.40 | 0.43 | 0.77 | 0.60 | l | 0.86 | o | ||||||||||
1987 | 0.00 | 0.06 | a | 0.24 | 0.25 | 0.02 | 1.35 | 0.25 | 0.85 | 0.43 | 0.16 | a | 0.69 | 0.75 | n | 1.35 | p | |||||||||
1988 | 0.07 | 0.41 | a | 0.05 | 0.14 | 0.00 | 0.13 | 0.79 | 0.95 | 0.55 | 0.11 | 0.10 | 0.01 | w | 0.95 | x | ||||||||||
1989 | 0.22 | 0.80 | 0.24 | a | 0.00 | 0.66 | 0.01 | 0.36 | 1.10 | 0.80 | 0.54 | 0.00 | 0.00 | q | 1.10 | r | ||||||||||
1990 | 0.31 | b | 0.10 | 0.39 | a | 0.55 | 0.23 | 0.00 | 0.86 | 0.59 | 1.25 | 0.57 | 0.66 | d | 0.22 | m | 1.25 | t | ||||||||
1991 | 0.78 | n | 0.26 | 0.08 | 0.09 | 0.19 | 0.22 | 0.58 | 1.02 | 0.70 | 0.14 | 0.31 | 0.90 | 1.02 | n | |||||||||||
1992 | 0.72 | t | 0.10 | 0.22 | 0.40 | 0.54 | 0.03 | 0.00 | 0.77 | 0.83 | 0.38 | 0.35 | ----- | z | ----- | z | ||||||||||
1993 | 0.49 | 0.15 | 0.00 | 0.12 | 0.03 | 0.67 | a | 0.32 | 0.51 | 0.21 | ----- | z | 0.38 | 0.76 | ----- | z | ||||||||||
1994 | 0.03 | 0.31 | ----- | z | 0.06 | ----- | z | ----- | z | 0.67 | ----- | z | 0.24 | 0.24 | 0.26 | y | 0.51 | y | ----- | z | ||||||
1995 | ----- | z | 0.58 | t | ----- | z | 0.05 | 0.16 | 0.30 | 0.28 | 0.35 | 0.70 | u | ----- | z | 0.27 | 0.00 | ----- | z | |||||||
1996 | 0.26 | 0.17 | 0.00 | ----- | z | 0.00 | 0.69 | x | 1.11 | 1.33 | 1.66 | 0.00 | 0.17 | 0.00 | ----- | z | ||||||||||
1997 | 0.65 | c | 0.22 | 0.44 | ----- | z | ----- | z | ----- | z | 0.19 | 1.14 | y | ----- | z | ----- | z | 0.45 | 0.25 | x | ----- | z | ||||
1998 | 0.99 | c | 0.10 | 0.14 | 0.00 | 0.05 | 0.31 | 0.55 | 0.96 | 0.25 | 0.46 | 0.30 | 0.17 | q | 0.99 | t | ||||||||||
1999 | 0.08 | 0.00 | 0.06 | 0.00 | 0.08 | 0.40 | 0.42 | 0.24 | 0.25 | 0.40 | 0.00 | ----- | z | ----- | z | |||||||||||
2000 | 0.00 | 0.01 | 0.08 | 0.20 | b | 0.00 | 1.93 | 0.55 | 0.12 | 0.00 | 0.47 | b | 0.69 | 0.00 | 1.93 | d | ||||||||||
2001 | 0.06 | 0.15 | 0.37 | 0.00 | 0.04 | 0.13 | 0.24 | a | 0.34 | 0.50 | c | 0.00 | 0.25 | e | 0.04 | 0.50 | i | |||||||||
2002 | 0.12 | n | 0.72 | b | 0.00 | c | 0.04 | b | 0.00 | 0.09 | 0.80 | a | 0.55 | a | 0.06 | b | 0.73 | f | 0.00 | n | 0.65 | q | ----- | z | ||
2003 | 0.31 | k | 1.10 | i | 0.10 | h | 0.00 | d | 0.00 | b | 0.40 | 0.21 | 0.10 | c | 0.15 | c | 0.19 | h | 0.57 | l | 0.00 | w | ----- | z | ||
2004 | 0.38 | h | 0.01 | h | 0.60 | f | 0.44 | b | 0.40 | ----- | z | 1.78 | 1.08 | 0.71 | y | 0.13 | 1.91 | 0.16 | r | ----- | z | |||||
2005 | 0.17 | l | ----- | z | 0.02 | h | 0.17 | g | 0.35 | f | 0.00 | e | 0.15 | e | 0.28 | q | ----- | z | ----- | z | 0.00 | 0.00 | u | ----- | z | |
2006 | ----- | z | 0.10 | i | 0.00 | h | 0.02 | d | 0.12 | d | 0.17 | a | ----- | z | 1.42 | 1.20 | a | 0.32 | d | 0.00 | k | 0.00 | q | ----- | z | |
2007 | 0.59 | k | 0.07 | 0.00 | c | 0.13 | 1.22 | c | 0.32 | 0.42 | 0.44 | 1.02 | 0.09 | d | 0.98 | d | 0.37 | o | ----- | z | ||||||
2008 | 0.02 | k | 0.00 | i | 0.00 | 0.00 | 0.05 | c | 0.02 | 2.30 | a | 0.45 | 0.73 | 0.34 | d | 0.19 | n | 0.14 | s | ----- | z | |||||
2009 | 0.02 | l | 0.01 | i | 0.11 | 0.00 | ----- | z | 1.71 | 0.57 | c | 0.25 | h | 0.99 | d | ----- | z | ----- | z | ----- | z | ----- | z | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.24 | 0.22 | 0.17 | 0.14 | 0.20 | 0.36 | 0.61 | 0.65 | 0.65 | 0.48 | 0.27 | 0.27 | 1.32 | |||||||||||||
S.D. | 0.21 | 0.22 | 0.25 | 0.23 | 0.24 | 0.43 | 0.52 | 0.41 | 0.65 | 0.44 | 0.33 | 0.28 | 0.62 | |||||||||||||
SKEW | 1.30 | 1.20 | 3.33 | 2.30 | 1.63 | 1.82 | 2.41 | 0.33 | 1.62 | 1.62 | 2.33 | 0.88 | 1.29 | |||||||||||||
MAX | 0.99 | 0.91 | 1.59 | 1.12 | 1.22 | 1.93 | 3.08 | 1.68 | 3.30 | 2.26 | 1.91 | 0.99 | 3.30 | |||||||||||||
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 | 0.46 | |||||||||||||
YRS | 59 | 64 | 65 | 68 | 67 | 67 | 70 | 67 | 67 | 63 | 65 | 52 | 44 |