YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1958 | 0.00 | z | 0.00 | z | 0.00 | z | 0.28 | 0.50 | 0.40 | 0.25 | 0.04 | 1.25 | 0.02 | 0.32 | 0.20 | 3.26 | ||||||||||
1959 | 0.06 | 1.65 | 0.21 | 0.15 | 0.25 | 0.92 | 0.13 | 1.31 | 1.53 | 0.95 | 0.10 | 0.73 | 7.99 | |||||||||||||
1960 | 0.52 | 0.84 | 0.40 | 0.56 | 0.59 | 0.47 | 0.06 | 0.64 | 0.54 | 1.19 | 0.62 | 0.41 | 6.84 | |||||||||||||
1961 | 0.00 | 0.01 | 0.89 | 0.40 | 0.43 | 0.11 | 0.25 | 1.20 | 3.15 | 0.00 | z | 0.66 | 0.54 | 7.64 | ||||||||||||
1962 | 0.38 | 1.52 | 0.46 | 0.19 | 0.61 | 0.08 | 0.03 | 0.03 | 0.95 | 0.54 | 0.23 | 0.00 | 5.02 | |||||||||||||
1963 | 0.16 | 0.22 | 0.50 | 0.99 | 0.02 | 0.15 | 0.00 | 1.52 | 0.56 | 0.31 | 0.38 | 0.09 | 4.90 | |||||||||||||
1964 | 0.02 | 0.01 | 0.70 | 0.92 | 0.40 | 0.44 | 0.12 | 0.54 | 0.35 | 0.20 | 1.51 | 1.59 | 6.80 | |||||||||||||
1965 | 0.51 | 0.11 | 0.39 | 1.05 | 1.35 | 2.49 | 1.40 | 0.40 | 1.80 | 0.52 | 1.17 | 1.10 | 12.29 | |||||||||||||
1966 | 0.05 | 0.60 | 0.12 | 0.32 | 0.97 | 0.45 | 0.52 | 0.64 | 0.56 | 1.11 | 0.55 | 1.93 | 7.82 | |||||||||||||
1967 | 0.65 | 0.02 | 0.66 | 0.14 | 0.67 | 1.12 | 1.49 | 0.51 | 0.41 | 0.33 | 0.30 | 0.92 | 7.22 | |||||||||||||
1968 | 0.09 | 0.61 | 1.50 | 1.59 | 0.76 | 0.54 | 0.06 | 0.80 | 0.12 | 0.37 | 0.27 | 0.92 | 7.63 | |||||||||||||
1969 | 1.68 | 1.61 | 0.15 | 0.72 | 0.07 | 1.00 | 0.29 | 0.13 | 1.35 | 1.91 | 0.50 | 0.75 | 10.16 | |||||||||||||
1970 | 0.37 | 0.29 | 0.58 | 0.60 | 0.30 | 2.62 | 1.16 | 0.18 | 0.46 | 1.34 | 0.83 | 0.70 | 9.43 | |||||||||||||
1971 | 0.36 | 1.16 | 0.00 | 1.60 | 3.28 | 0.03 | 0.05 | 0.08 | 0.00 | z | 2.13 | 0.04 | 1.40 | 10.13 | ||||||||||||
1972 | 0.00 | 0.00 | 0.00 | 0.63 | 0.82 | 0.71 | 0.39 | 0.58 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 3.13 | |||||||||
1973 | 1.40 | 0.49 | 1.40 | 0.96 | 0.58 | 1.36 | 0.39 | 1.02 | 0.53 | 0.62 | 1.13 | 0.10 | 9.98 | |||||||||||||
1974 | 0.71 | 0.31 | 0.11 | 0.87 | 0.01 | 0.74 | 0.05 | 0.13 | 0.06 | 1.42 | 0.09 | 0.14 | 4.64 | |||||||||||||
1975 | 0.89 | 0.34 | 1.88 | 0.85 | 2.23 | 0.54 | 1.21 | 0.27 | 0.30 | 1.02 | 0.64 | 0.19 | 10.36 | |||||||||||||
1976 | 0.06 | 0.74 | 0.48 | 2.07 | 0.72 | 0.39 | 0.15 | 0.10 | 0.55 | 0.10 | 0.00 | 0.00 | 5.36 | |||||||||||||
1977 | 0.33 | 0.25 | 0.14 | 0.32 | 1.29 | 0.08 | 1.44 | 1.32 | 0.27 | 0.41 | 0.47 | 0.24 | 6.56 | |||||||||||||
1978 | 1.62 | 0.73 | 1.42 | 1.54 | 1.00 | 0.15 | 0.07 | 0.82 | 0.38 | 0.30 | 1.32 | 1.09 | 10.44 | |||||||||||||
1979 | 0.69 | 0.64 | 2.21 | 0.17 | 0.62 | 0.00 | 0.05 | 0.80 | 0.00 | 1.48 | 0.21 | 0.50 | 7.37 | |||||||||||||
1980 | 1.62 | 1.59 | 0.96 | 0.30 | 2.29 | 0.01 | 0.34 | 0.90 | 1.32 | 0.86 | 0.17 | 0.16 | 10.52 | |||||||||||||
1981 | 0.11 | 0.62 | 1.17 | 1.15 | 1.51 | 0.43 | 0.26 | 0.15 | 1.06 | 4.26 | 0.51 | 0.42 | 11.65 | |||||||||||||
1982 | 0.70 | 0.31 | 1.19 | 0.07 | 0.51 | 0.01 | 0.14 | 0.88 | 2.87 | 1.21 | 1.49 | 0.60 | 9.98 | |||||||||||||
1983 | 1.00 | 2.20 | 0.50 | 0.96 | 1.43 | 0.60 | 0.77 | 0.68 | 0.95 | 0.54 | 1.61 | a | 0.90 | 12.14 | ||||||||||||
1984 | 0.23 | 0.26 | 0.07 | 0.98 | 0.17 | 1.36 | 1.48 | 0.37 | 1.01 | 1.08 | 0.00 | z | 1.69 | 8.70 | ||||||||||||
1985 | 0.57 | 0.14 | 0.72 | 0.50 | 0.94 | 0.53 | 1.04 | 0.01 | 1.49 | 1.06 | 0.94 | 0.70 | 8.64 | |||||||||||||
1986 | 0.16 | 0.42 | 0.88 | 1.75 | 1.21 | 0.51 | 1.81 | 0.52 | 1.71 | 1.21 | 0.07 | 0.15 | 10.40 | |||||||||||||
1987 | 0.38 | 0.68 | 1.00 | 0.20 | 0.78 | 0.19 | 1.08 | 0.89 | 0.09 | 1.47 | 1.15 | 0.68 | 8.59 | |||||||||||||
1988 | 0.59 | 0.01 | 0.68 | 1.39 | 0.66 | 0.19 | 0.13 | 0.35 | 0.92 | 0.04 | 0.31 | 0.84 | 6.11 | |||||||||||||
1989 | 0.25 | 0.61 | 0.18 | 0.09 | 0.14 | 0.46 | 0.21 | 0.19 | 0.69 | 0.35 | 0.55 | 0.01 | 3.73 | |||||||||||||
1990 | 0.60 | 0.69 | 0.67 | 0.73 | 0.43 | 1.27 | 0.33 | 1.09 | 1.94 | 1.07 | 1.14 | 0.95 | 10.91 | |||||||||||||
1991 | 0.19 | 0.50 | 0.80 | 1.29 | 0.48 | 0.59 | 0.82 | 0.93 | 0.98 | 0.72 | 0.31 | 0.26 | 7.87 | |||||||||||||
1992 | 0.19 | a | 0.54 | 0.90 | 0.03 | 1.99 | 0.35 | 1.88 | 0.66 | 0.40 | 1.04 | 0.56 | 0.98 | 9.52 | ||||||||||||
1993 | 1.15 | a | 0.91 | 2.16 | 0.55 | 1.20 | 0.13 | 0.34 | 1.39 | 0.47 | 2.15 | 0.55 | 0.00 | 11.00 | ||||||||||||
1994 | 0.00 | 0.98 | 0.42 | 0.70 | 0.53 | 0.26 | 0.18 | 0.87 | 0.99 | 4.26 | 1.19 | 0.21 | 10.59 | |||||||||||||
1995 | 0.59 | 0.63 | 0.44 | 1.45 | 2.51 | 0.77 | 0.88 | 0.74 | 0.87 | 0.09 | 0.10 | 0.10 | 9.17 | |||||||||||||
1996 | 0.96 | 0.89 | a | 0.38 | 0.25 | 1.02 | 0.83 | 1.26 | 0.01 | 1.11 | 1.44 | 1.10 | 0.65 | 9.90 | ||||||||||||
1997 | 1.30 | a | 0.77 | 0.00 | 0.91 | 0.78 | 1.16 | 0.26 | 2.08 | 3.73 | 0.45 | a | 0.56 | 0.29 | 12.29 | |||||||||||
1998 | 1.00 | 1.00 | 0.53 | 0.01 | 0.36 | 1.60 | 2.44 | 0.52 | b | 0.20 | 1.51 | 0.85 | 0.50 | 10.52 | ||||||||||||
1999 | 0.58 | a | 0.54 | 0.00 | 2.25 | 1.63 | 0.38 | 0.86 | 1.13 | 0.81 | 0.08 | 0.00 | 0.00 | z | 8.26 | |||||||||||
2000 | 0.00 | b | 0.00 | z | 0.81 | 0.95 | a | 0.00 | z | 0.28 | 0.11 | 0.95 | 1.29 | 1.44 | 0.00 | 0.05 | a | 5.88 | ||||||||
2001 | 0.00 | a | 0.00 | d | 0.25 | 1.27 | a | 0.21 | d | 0.60 | a | 2.50 | 1.11 | a | 0.24 | 0.72 | b | 0.74 | e | 0.35 | d | 7.99 | ||||
2002 | 0.03 | a | 0.00 | a | 0.36 | a | 0.25 | 0.03 | a | 0.03 | 0.32 | a | 0.17 | a | 2.25 | d | 1.02 | b | 0.48 | c | 0.23 | a | 5.17 | |||
2003 | 0.59 | k | 0.72 | f | 0.68 | 0.80 | 1.13 | 0.80 | a | 0.00 | 0.26 | a | 0.08 | 0.04 | 0.74 | e | 0.58 | g | 4.53 | |||||||
2004 | 0.07 | d | 0.71 | b | 0.04 | 0.78 | b | 0.15 | 0.43 | 0.14 | 0.10 | 1.60 | 3.16 | 1.26 | 0.45 | 8.89 | ||||||||||
2005 | 1.41 | a | 0.85 | 0.84 | 0.85 | 1.19 | 1.18 | 0.07 | 0.61 | 1.43 | 1.02 | 0.55 | 0.02 | 10.02 | ||||||||||||
2006 | 0.58 | c | 0.00 | 0.72 | l | 0.79 | n | 0.36 | 0.00 | p | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.94 | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.53 | 0.61 | 0.66 | 0.78 | 0.86 | 0.62 | 0.61 | 0.64 | 0.99 | 1.06 | 0.61 | 0.55 | 8.66 | |||||||||||||
S.D. | 0.49 | 0.51 | 0.55 | 0.55 | 0.70 | 0.58 | 0.66 | 0.47 | 0.82 | 0.95 | 0.45 | 0.48 | 2.29 | |||||||||||||
SKEW | 0.88 | 1.03 | 1.12 | 0.66 | 1.37 | 1.68 | 1.25 | 0.66 | 1.39 | 1.82 | 0.52 | 1.00 | -0.37 | |||||||||||||
MAX | 1.68 | 2.20 | 2.21 | 2.25 | 3.28 | 2.62 | 2.50 | 2.08 | 3.73 | 4.26 | 1.61 | 1.93 | 12.29 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.00 | 0.00 | 0.01 | 0.00 | 0.02 | 0.00 | 0.00 | 3.73 | |||||||||||||
NO YRS | 47 | 46 | 47 | 48 | 48 | 48 | 48 | 48 | 46 | 46 | 46 | 45 | 40 |