| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1972 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.73 | 0.30 | 1.03 | |||
| 1973 | 0.51 | 0.17 | 0.27 | 0.57 | 0.25 | 0.05 | 0.10 | 0.11 | 0.43 | 0.18 | 1.15 | 0.69 | 4.48 | |||||||||||||
| 1974 | 0.35 | 0.18 | 0.97 | 0.40 | 0.18 | 0.00 | 1.13 | 0.00 | 0.00 | 0.88 | 0.14 | 0.35 | 4.58 | |||||||||||||
| 1975 | 1.00 | 0.48 | 1.03 | 0.92 | 0.32 | 1.21 | 0.15 | 1.55 | 0.00 | 2.34 | 0.22 | 0.37 | 9.59 | |||||||||||||
| 1976 | 0.57 | 1.21 | 0.28 | 1.53 | 0.08 | 0.87 | 1.10 | 1.96 | 1.09 | 0.28 | 0.10 | 0.00 | 9.07 | |||||||||||||
| 1977 | 1.04 | 0.32 | 0.35 | 0.18 | 1.96 | 0.50 | 0.47 | 0.48 | 0.69 | 0.08 | 1.33 | 1.76 | 9.16 | |||||||||||||
| 1978 | 1.44 | 1.14 | 0.71 | 2.77 | 0.19 | 0.62 | 0.61 | 0.69 | 0.85 | 0.16 | 0.85 | 0.19 | 10.22 | |||||||||||||
| 1979 | 1.20 | 0.53 | 0.67 | 1.07 | 0.86 | 0.51 | 0.02 | 1.75 | 0.21 | 0.78 | 0.65 | 0.46 | 8.71 | |||||||||||||
| 1980 | 0.70 | 0.98 | 1.08 | 0.50 | 1.56 | 0.84 | 0.26 | 0.10 | 1.54 | 0.32 | 0.14 | 0.52 | 8.54 | |||||||||||||
| 1981 | 1.13 | 0.60 | 2.27 | 0.54 | 1.41 | 0.63 | 0.16 | 0.08 | 0.40 | 0.71 | 1.06 | a | 2.00 | 10.99 | ||||||||||||
| 1982 | 0.36 | c | 0.00 | z | 0.71 | b | 0.53 | a | 0.33 | 1.53 | 1.42 | 0.09 | 1.04 | 0.84 | 1.86 | 0.62 | c | 9.33 | ||||||||
| 1983 | 0.60 | a | 0.88 | 1.83 | a | 1.56 | 0.81 | a | 0.75 | 0.56 | 0.90 | a | 0.16 | 0.77 | 1.21 | a | 2.00 | h | 10.03 | |||||||
| 1984 | 0.24 | 0.67 | b | 1.53 | 0.53 | 1.07 | 1.61 | 1.84 | 0.53 | 0.04 | 0.58 | b | 1.77 | d | 0.15 | c | 10.56 | |||||||||
| 1985 | 0.00 | z | 0.66 | b | 0.73 | 0.63 | 0.54 | a | 0.24 | 1.10 | 0.00 | 0.99 | 0.25 | 0.85 | 1.23 | 7.22 | ||||||||||
| 1986 | 0.53 | 2.58 | 1.40 | 1.03 | 0.98 | 0.00 | 0.07 | 0.00 | 1.07 | b | 0.00 | e | 0.31 | 0.70 | b | 8.67 | ||||||||||
| 1987 | 0.42 | b | 0.89 | 0.77 | 0.72 | 2.12 | 0.43 | 0.65 | a | 0.27 | 0.00 | 0.10 | 0.41 | 0.73 | a | 7.51 | ||||||||||
| 1988 | 1.06 | a | 0.16 | 0.96 | 0.96 | 0.19 | 0.61 | 0.12 | 0.22 | 0.34 | 0.00 | 1.65 | 0.86 | a | 7.13 | |||||||||||
| 1989 | 0.62 | b | 0.53 | 1.71 | 0.85 | 1.44 | 0.09 | 0.00 | 0.31 | 0.88 | a | 0.18 | a | 0.64 | 0.17 | 7.42 | ||||||||||
| 1990 | 0.38 | 2.05 | 0.16 | 1.14 | 0.82 | a | 0.10 | 0.43 | 1.15 | 0.00 | 0.24 | 0.36 | 0.25 | 7.08 | ||||||||||||
| 1991 | 0.22 | 0.49 | 0.95 | 1.76 | 3.20 | 1.55 | 0.04 | 0.22 | 0.75 | 0.53 | 1.00 | a | 0.71 | 11.42 | ||||||||||||
| 1992 | 0.24 | a | 0.34 | 0.52 | 0.00 | z | 0.19 | 1.86 | 0.21 | 0.03 | 0.06 | 0.77 | 0.66 | 1.15 | b | 6.03 | ||||||||||
| 1993 | 1.42 | b | 1.43 | 1.22 | a | 0.95 | a | 0.89 | a | 1.35 | 0.60 | 0.66 | 0.02 | 0.48 | 0.42 | 0.16 | 9.60 | |||||||||
| 1994 | 0.10 | 1.28 | 0.20 | 1.78 | 0.95 | 0.39 | 0.00 | 0.04 | 0.04 | 0.20 | 0.72 | a | 1.88 | 7.58 | ||||||||||||
| 1995 | 1.17 | 0.58 | 1.01 | 1.17 | a | 1.37 | 2.31 | 0.50 | 0.10 | 0.12 | 0.38 | 0.37 | 1.84 | 10.92 | ||||||||||||
| 1996 | 1.58 | b | 0.90 | a | 0.49 | 0.96 | 1.27 | 0.58 | 0.05 | 0.07 | 0.39 | 0.33 | 0.88 | 1.02 | 8.52 | |||||||||||
| 1997 | 2.09 | a | 0.24 | 0.10 | a | 0.00 | z | 0.44 | 1.35 | 0.93 | 0.00 | 0.21 | 0.11 | 0.64 | 0.21 | 6.32 | ||||||||||
| 1998 | 0.77 | 1.28 | 1.00 | 1.97 | 3.83 | 1.00 | 0.65 | 0.05 | 0.59 | 0.58 | 0.94 | a | 1.31 | b | 13.97 | |||||||||||
| 1999 | 0.95 | 1.26 | b | 0.00 | z | 0.00 | z | 0.00 | z | 1.13 | c | 0.13 | 0.23 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 3.70 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.80 | 0.84 | 0.88 | 1.04 | 1.05 | 0.82 | 0.49 | 0.43 | 0.46 | 0.46 | 0.78 | 0.75 | 8.84 | |||||||||||||
| S.D. | 0.49 | 0.58 | 0.55 | 0.60 | 0.93 | 0.62 | 0.49 | 0.56 | 0.44 | 0.47 | 0.49 | 0.60 | 2.20 | |||||||||||||
| SKEW | 0.72 | 1.23 | 0.67 | 1.10 | 1.47 | 0.56 | 1.08 | 1.54 | 0.69 | 2.48 | 0.62 | 0.80 | 0.00 | |||||||||||||
| MAX | 2.09 | 2.58 | 2.27 | 2.77 | 3.83 | 2.31 | 1.84 | 1.96 | 1.54 | 2.34 | 1.86 | 2.00 | 13.97 | |||||||||||||
| MIN | 0.10 | 0.16 | 0.10 | 0.18 | 0.08 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.00 | 4.48 | |||||||||||||
| NO YRS | 26 | 26 | 26 | 24 | 26 | 27 | 27 | 27 | 26 | 26 | 27 | 26 | 21 | |||||||||||||