| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 3.11 | a | 0.76 | 0.94 | 0.97 | 0.72 | 4.06 | 5.86 | 16.42 | |||||||
| 1949 | 0.30 | 5.29 | 1.82 | 0.12 | 0.10 | 0.12 | 0.11 | 0.23 | 0.80 | 1.95 | 5.04 | 3.14 | 19.02 | |||||||||||||
| 1950 | 5.32 | 3.30 | 2.88 | 0.83 | 0.16 | 1.89 | 0.17 | 0.30 | 0.04 | 4.17 | 5.90 | 3.61 | 28.57 | |||||||||||||
| 1951 | 6.60 | 0.00 | z | 2.62 | 0.09 | 2.98 | 1.91 | 0.23 | 2.12 | 0.06 | a | 3.75 | 4.74 | 2.79 | 27.89 | |||||||||||
| 1952 | 3.85 | 2.09 | 0.16 | 0.26 | 0.48 | 1.97 | 0.01 | 0.04 | 0.22 | 0.18 | 0.52 | 3.18 | 12.96 | |||||||||||||
| 1953 | 6.31 | 0.97 | 0.79 | 0.72 | 1.95 | 0.84 | 0.00 | 1.20 | 0.24 | 0.43 | 2.77 | 4.30 | 20.52 | |||||||||||||
| 1954 | 6.37 | 2.39 | 1.26 | 0.37 | 0.38 | 0.49 | 0.58 | 0.77 | 1.08 | 1.07 | 4.55 | 2.34 | a | 21.65 | ||||||||||||
| 1955 | 2.34 | a | 2.69 | 2.46 | 1.02 | 0.32 | 0.22 | 1.01 | 0.00 | 0.55 | 4.38 | 9.01 | 9.97 | 33.97 | ||||||||||||
| 1956 | 6.84 | 2.60 | 4.12 | 0.70 | 0.57 | 1.38 | 0.00 | 1.32 | 1.62 | 2.96 | 1.39 | 4.86 | 28.36 | |||||||||||||
| 1957 | 1.97 | 3.15 | 4.25 | 1.40 | 1.47 | 0.54 | 0.05 | 0.41 | 0.41 | 3.22 | 1.00 | 5.51 | 23.38 | |||||||||||||
| 1958 | 5.03 | 4.74 | 2.38 | 2.72 | 0.30 | 1.06 | 0.20 | 0.04 | 0.63 | 2.83 | 8.23 | 3.93 | 32.09 | |||||||||||||
| 1959 | 8.72 | 2.53 | 2.07 | b | 0.48 | 0.47 | 0.51 | 0.02 | 0.10 | 2.89 | 3.45 | 5.48 | 3.68 | 30.40 | ||||||||||||
| 1960 | 1.73 | 2.93 | 3.00 | 1.82 | 1.61 | 0.12 | 0.05 | 0.36 | 0.16 | 0.63 | 5.53 | 1.77 | 19.71 | |||||||||||||
| 1961 | 3.68 | 5.61 | 4.03 | 2.06 | 1.19 | 0.32 | 0.44 | 0.41 | 0.54 | 2.24 | 3.40 | 5.22 | 29.14 | |||||||||||||
| 1962 | 2.70 | 2.19 | 1.83 | 2.16 | 1.67 | 0.52 | 0.89 | 0.39 | 0.76 | 2.89 | 6.21 | 1.80 | 24.01 | |||||||||||||
| 1963 | 0.69 | 3.56 | 2.32 | 2.55 | 1.21 | 0.33 | 0.47 | 0.26 | 0.34 | 1.63 | 4.41 | 2.97 | 20.74 | |||||||||||||
| 1964 | 7.44 | 0.56 | 1.71 | 0.60 | 0.00 | z | 1.28 | 0.09 | 0.60 | 1.05 | 0.57 | 4.45 | 6.53 | 24.88 | ||||||||||||
| 1965 | 6.48 | 2.02 | 0.18 | 2.26 | 0.35 | 0.41 | 0.53 | 0.84 | 0.53 | 0.00 | z | 3.04 | 4.01 | 20.65 | ||||||||||||
| 1966 | 6.31 | 1.82 | 2.87 | 0.05 | 0.40 | 0.86 | 1.26 | 0.00 | 0.37 | 1.80 | 4.27 | 4.75 | 24.76 | |||||||||||||
| 1967 | 5.15 | 0.73 | 1.87 | 3.18 | 0.35 | 0.40 | 0.00 | 0.00 | 0.16 | 5.05 | a | 2.58 | 5.09 | 24.56 | ||||||||||||
| 1968 | 6.14 | 3.05 | 1.14 | 0.47 | 0.32 | 0.36 | 0.02 | 2.31 | 0.43 | 1.78 | 4.56 | 8.42 | 29.00 | |||||||||||||
| 1969 | 7.69 | 5.00 | 0.69 | 0.86 | 0.15 | 0.37 | 0.03 | 0.00 | 1.49 | 1.15 | 0.84 | 7.49 | 25.76 | |||||||||||||
| 1970 | 8.68 | 1.32 | 1.86 | 0.91 | 0.04 | 0.00 | 0.00 | 0.07 | 0.26 | 1.40 | 3.93 | 8.29 | 26.76 | |||||||||||||
| 1971 | 6.54 | 1.98 | 4.34 | 1.06 | 0.33 | 0.66 | 0.00 | 0.33 | 1.01 | 1.45 | 3.84 | 7.29 | 28.83 | |||||||||||||
| 1972 | 10.19 | 8.03 | 4.53 | 1.20 | 0.79 | 1.13 | 0.19 | 1.39 | 1.21 | 0.12 | 3.96 | 5.82 | 38.56 | |||||||||||||
| 1973 | 0.00 | z | 0.63 | 0.37 | 0.09 | 0.53 | 0.33 | 0.10 | 0.00 | 1.66 | 2.67 | 7.46 | 7.56 | 21.40 | ||||||||||||
| 1974 | 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 | 0.00 | z | 0.00 | z | 0.00 | |
| 1975 | 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 | 0.00 | z | 0.00 | z | 0.00 | |
| 1976 | 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 | 0.00 | z | 0.00 | z | 0.00 | |
| 1977 | 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 | 0.00 | z | 0.00 | z | 0.00 | |
| 1978 | 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 | 0.00 | z | 0.00 | z | 0.00 | |
| 1979 | 1.62 | 4.38 | 1.00 | 0.82 | 0.15 | 0.21 | 0.56 | 0.26 | 0.36 | 2.27 | 2.23 | 8.32 | 22.18 | |||||||||||||
| 1980 | 4.16 | 4.13 | 1.64 | 1.45 | 0.84 | 1.45 | 0.00 | 0.43 | 1.24 | 0.16 | 5.18 | 7.20 | 27.88 | |||||||||||||
| 1981 | 2.54 | 5.12 | 0.49 | 1.14 | 1.97 | 0.55 | 0.32 | 0.28 | 1.00 | 3.48 | 3.79 | 7.07 | 27.75 | |||||||||||||
| 1982 | 6.39 | 4.41 | 2.48 | 0.71 | 0.20 | a | 0.93 | 0.96 | 0.02 | 0.86 | 4.85 | 2.49 | 7.22 | 31.52 | ||||||||||||
| 1983 | 7.20 | 4.41 | 4.43 | 1.08 | 0.11 | 0.31 | 0.37 | 0.67 | 1.09 | 0.16 | 8.75 | 3.39 | 31.97 | |||||||||||||
| 1984 | 3.18 | 1.62 | 0.00 | z | 1.56 | 1.64 | 2.33 | 0.00 | 0.53 | 1.38 | 1.45 | 6.22 | a | 2.12 | 22.03 | |||||||||||
| 1985 | 0.13 | 1.89 | 2.08 | 0.51 | 0.23 | 1.09 | 0.16 | 0.32 | 0.90 | 3.33 | 2.69 | 1.51 | 14.84 | |||||||||||||
| 1986 | 5.97 | 4.47 | 1.44 | 0.46 | 0.81 | 0.35 | 0.02 | 0.03 | 1.73 | 0.62 | 5.32 | 2.41 | 23.63 | |||||||||||||
| 1987 | 4.34 | 3.20 | 2.77 | a | 0.38 | 0.70 | 0.38 | 0.82 | 0.00 | 0.01 | 0.00 | 1.14 | 10.06 | 23.80 | ||||||||||||
| 1988 | 2.17 | 0.59 | 1.74 | 2.00 | 0.45 | 1.24 | 0.02 | 0.10 | 0.59 | 1.09 | 5.49 | 2.55 | 18.03 | |||||||||||||
| 1989 | 1.96 | 1.51 | 2.46 | 1.59 | 0.77 | 0.11 | 0.32 | a | 0.00 | 0.00 | 2.74 | 1.86 | 1.47 | 14.79 | ||||||||||||
| 1990 | 10.59 | 2.28 | 1.05 | 0.90 | 2.39 | 0.00 | z | 0.21 | 1.66 | a | 0.00 | 0.00 | z | 0.00 | z | 0.00 | z | 19.08 | ||||||||
| 1991 | 1.81 | a | 1.10 | 1.58 | 0.00 | z | 2.78 | 1.59 | 0.15 | 1.25 | 0.43 | 0.76 | a | 3.96 | 2.19 | a | 17.60 | |||||||||
| 1992 | 3.16 | a | 3.01 | a | 1.21 | 1.97 | 0.00 | 2.92 | 0.95 | 0.26 | 0.50 | a | 0.80 | 3.12 | d | 2.80 | 20.70 | |||||||||
| 1993 | 3.08 | c | 0.44 | j | 0.96 | b | 1.45 | 0.51 | a | 1.17 | a | 0.72 | 0.02 | 0.10 | 0.50 | 1.53 | 2.63 | a | 12.67 | |||||||
| 1994 | 0.90 | 2.16 | 1.20 | 1.40 | 0.42 | 0.53 | 0.06 | 0.43 | 0.12 | 4.46 | 3.21 | a | 3.26 | 18.15 | ||||||||||||
| 1995 | 2.25 | b | 2.98 | 3.92 | 1.40 | a | 1.19 | 0.74 | 0.83 | 0.62 | 0.39 | 3.09 | 8.35 | 5.29 | 31.05 | |||||||||||
| 1996 | 4.76 | 6.31 | a | 1.08 | 2.45 | 1.03 | 0.76 | 0.30 | 0.01 | a | 0.59 | 2.50 | 3.21 | 7.76 | 30.76 | |||||||||||
| 1997 | 4.62 | 1.76 | 3.83 | 1.65 | c | 0.45 | a | 1.60 | 0.68 | 0.60 | 1.94 | a | 5.02 | 2.82 | 1.24 | 26.21 | ||||||||||
| 1998 | 6.99 | a | 5.07 | b | 1.98 | 0.91 | 3.67 | 1.18 | a | 0.78 | 0.16 | 0.00 | 0.13 | 7.34 | b | 8.42 | a | 36.63 | ||||||||
| 1999 | 6.14 | 6.23 | 2.15 | 0.08 | 0.23 | 0.28 | 0.37 | 1.10 | 0.47 | 1.32 | 7.17 | 7.27 | 32.81 | |||||||||||||
| 2000 | 4.03 | 4.07 | 1.05 | a | 0.20 | 0.31 | b | 0.56 | 0.32 | a | 0.00 | 1.15 | 1.25 | 1.47 | 2.26 | 16.67 | ||||||||||
| 2001 | 1.56 | 1.47 | 2.14 | 0.62 | 0.76 | 1.19 | b | 0.01 | 0.60 | 0.25 | 2.47 | 6.13 | 6.39 | c | 23.59 | |||||||||||
| 2002 | 5.21 | 2.43 | b | 6.05 | a | 2.02 | 0.51 | e | 0.62 | 0.17 | 0.12 | 0.44 | a | 0.00 | 1.34 | 7.27 | 26.18 | |||||||||
| 2003 | 12.39 | a | 1.66 | 3.63 | a | 1.44 | a | 0.00 | z | 0.26 | 0.00 | 0.00 | 0.00 | 3.45 | 6.17 | 4.10 | 33.10 | |||||||||
| 2004 | 3.07 | 2.37 | 1.48 | 0.75 | a | 1.89 | b | 1.54 | 0.82 | 2.12 | 1.75 | 4.39 | 1.11 | 3.92 | a | 25.21 | ||||||||||
| 2005 | 3.20 | a | 0.70 | 2.28 | 1.15 | b | 3.87 | 1.27 | 0.61 | 0.51 | 1.61 | 2.19 | 3.99 | b | 5.96 | 27.34 | ||||||||||
| 2006 | 7.83 | 3.08 | 0.90 | c | 1.10 | b | 2.20 | a | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 15.11 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 4.78 | 2.97 | 2.16 | 1.14 | 0.95 | 0.89 | 0.33 | 0.50 | 0.72 | 2.06 | 4.18 | 4.89 | 25.45 | |||||||||||||
| S.D. | 2.76 | 1.69 | 1.29 | 0.76 | 0.94 | 0.70 | 0.35 | 0.59 | 0.62 | 1.49 | 2.19 | 2.41 | 5.89 | |||||||||||||
| SKEW | 0.46 | 0.74 | 0.78 | 0.61 | 1.48 | 1.25 | 0.83 | 1.54 | 1.09 | 0.38 | 0.35 | 0.33 | -0.07 | |||||||||||||
| MAX | 12.39 | 8.03 | 6.05 | 3.18 | 3.87 | 3.11 | 1.26 | 2.31 | 2.89 | 5.05 | 9.01 | 10.06 | 38.56 | |||||||||||||
| MIN | 0.13 | 0.56 | 0.16 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.52 | 1.24 | 12.96 | |||||||||||||
| NO YRS | 52 | 51 | 52 | 52 | 51 | 52 | 53 | 53 | 53 | 51 | 52 | 52 | 43 | |||||||||||||