| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1965 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.07 | 1.20 | 0.58 | 8.59 | 1.33 | 1.82 | 14.59 | |||||||
| 1966 | 0.00 | z | 2.74 | 2.03 | 0.00 | z | 3.57 | 0.98 | 0.68 | 2.98 | 4.04 | 5.20 | 3.23 | 1.22 | 26.67 | |||||||||||
| 1967 | 1.35 | 0.71 | 0.06 | 0.28 | 1.00 | 0.76 | 1.65 | 3.31 | 9.54 | 3.75 | 0.92 | 1.18 | 24.51 | |||||||||||||
| 1968 | 1.47 | 3.87 | 2.41 | 1.84 | 0.62 | 0.62 | 1.49 | 1.81 | 4.94 | 3.06 | 3.87 | 0.21 | 26.21 | |||||||||||||
| 1969 | 0.44 | 0.42 | 1.14 | 1.19 | 1.74 | 1.12 | 1.32 | 3.37 | 4.47 | 2.78 | 6.01 | 3.01 | 27.01 | |||||||||||||
| 1970 | 0.47 | 2.51 | 0.83 | 0.59 | 2.31 | 1.80 | 1.54 | 1.68 | 5.09 | 5.36 | 2.52 | 0.96 | 25.66 | |||||||||||||
| 1971 | 0.23 | 2.04 | 1.41 | 2.04 | 2.34 | 0.57 | 0.43 | 2.98 | 3.20 | 2.01 | 0.92 | 1.73 | 19.90 | |||||||||||||
| 1972 | 1.60 | 1.14 | 1.81 | 0.28 | 2.26 | 0.48 | 0.16 | 4.06 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 11.79 | |||||||||
| 1973 | 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 | |
| 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 | 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 | |
| 1980 | 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 | |
| 1981 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 7.59 | 3.99 | 3.73 | 1.50 | l | 15.31 | ||||
| 1982 | 0.07 | 0.29 | 1.40 | 2.52 | 0.94 | 0.29 | 0.17 | 1.05 | 3.15 | 4.15 | 1.71 | 2.07 | 17.81 | |||||||||||||
| 1983 | 1.85 | 0.68 | 0.68 | 0.12 | i | 1.10 | 1.13 | 1.53 | 4.30 | 2.81 | 3.96 | 0.54 | 0.24 | 18.82 | ||||||||||||
| 1984 | 1.91 | 2.48 | 1.10 | 0.48 | 0.71 | 1.22 | 0.85 | 2.81 | 2.68 | 3.18 | 1.13 | 0.73 | a | 19.28 | ||||||||||||
| 1985 | 4.71 | 0.53 | 0.24 | 1.77 | 2.21 | 2.22 | 0.09 | u | 1.20 | 1.75 | a | 1.65 | 0.74 | g | 2.20 | 18.48 | ||||||||||
| 1986 | 2.75 | 1.55 | 2.51 | 1.24 | a | 1.26 | 0.71 | 0.96 | 3.00 | 0.95 | 6.02 | 1.40 | 2.98 | a | 25.33 | |||||||||||
| 1987 | 4.95 | a | 2.30 | 0.00 | z | 0.00 | z | 1.35 | 2.58 | 0.87 | 1.57 | 4.72 | o | 5.96 | 7.85 | 3.96 | a | 31.39 | ||||||||
| 1988 | 1.79 | b | 3.25 | 2.49 | 1.45 | 1.65 | a | 1.38 | 2.44 | 1.99 | k | 3.44 | 6.48 | 5.18 | b | 2.35 | a | 31.90 | ||||||||
| 1989 | 3.53 | 0.17 | 0.27 | 0.49 | 1.13 | 0.90 | 0.96 | 1.37 | 0.00 | z | 4.75 | 0.79 | g | 4.03 | c | 17.60 | ||||||||||
| 1990 | 0.56 | 1.71 | a | 2.53 | 0.79 | 1.09 | 2.46 | j | 1.84 | 3.54 | f | 3.87 | k | 3.40 | d | 1.86 | e | 4.22 | b | 18.00 | ||||||
| 1991 | 3.11 | a | 3.01 | 0.65 | 0.00 | z | 1.90 | 1.49 | 1.17 | 4.28 | m | 4.85 | 5.16 | 2.21 | d | 4.26 | 27.81 | |||||||||
| 1992 | 6.09 | 4.50 | 2.97 | 0.00 | z | 3.90 | h | 0.89 | 1.56 | 3.27 | 5.40 | b | 3.15 | 4.79 | 2.32 | 34.94 | ||||||||||
| 1993 | 7.64 | d | 5.47 | 2.38 | 0.96 | i | 1.19 | c | 1.19 | 0.94 | 0.65 | 3.10 | 6.00 | 5.92 | a | 4.74 | c | 39.22 | ||||||||
| 1994 | 1.63 | 0.23 | b | 1.98 | 0.88 | 0.96 | j | 0.98 | 1.72 | 0.74 | 6.24 | 6.63 | 2.80 | a | 1.97 | b | 25.80 | |||||||||
| 1995 | 0.74 | g | 0.83 | b | 0.21 | m | 0.72 | 0.66 | 1.26 | 0.91 | 0.95 | 3.39 | 3.44 | 1.21 | 2.54 | a | 15.91 | |||||||||
| 1996 | 0.77 | 2.29 | b | 0.82 | 0.31 | 0.00 | z | 1.01 | 0.29 | 1.54 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 7.03 | |||||||
| 1997 | 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 | |
| 1998 | 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 | |
| 1999 | 0.00 | z | 0.00 | z | 0.30 | d | 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 | 0.30 | |
| 2000 | 0.00 | 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 | ||
| 2001 | 3.72 | a | 3.41 | 1.63 | b | 0.00 | z | 0.00 | z | 1.35 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 10.11 | |||
| 2002 | 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 | |
| 2003 | 0.00 | z | 0.84 | 0.71 | 0.37 | 0.61 | 1.50 | 1.07 | 2.17 | 3.52 | 2.16 | 1.81 | 6.50 | 21.26 | ||||||||||||
| 2004 | 0.89 | 2.70 | 0.00 | z | 2.51 | 0.26 | 0.72 | 0.90 | 1.66 | 4.97 | 3.33 | 1.48 | 2.57 | 21.99 | ||||||||||||
| 2005 | 1.15 | 2.11 | 3.02 | 1.77 | 0.24 | 1.17 | 0.98 | 2.24 | 3.70 | 4.49 | 8.39 | 1.73 | 30.99 | |||||||||||||
| 2006 | 0.22 | 2.10 | 0.71 | 2.68 | 1.79 | 1.38 | 1.33 | 2.28 | 4.39 | 2.33 | 0.04 | 5.99 | 25.24 | |||||||||||||
| 2007 | 2.78 | 0.14 | 1.17 | 1.26 | 0.61 | 0.52 | 3.79 | 1.25 | 3.39 | 3.86 | 1.03 | 1.12 | 20.92 | |||||||||||||
| 2008 | 0.87 | 0.68 | 1.69 | 1.75 | 1.66 | 0.82 | 2.33 | 2.51 | 3.90 | 5.49 | 1.99 | 0.98 | 24.67 | |||||||||||||
| 2009 | 4.44 | 0.58 | 0.75 | 0.81 | 0.41 | 0.22 | 0.12 | 4.29 | 5.34 | 2.22 | 3.00 | 2.47 | 24.65 | |||||||||||||
| 2010 | 1.98 | 1.74 | 5.24 | 0.75 | 0.41 | 2.18 | 0.74 | 1.09 | 2.66 | 4.66 | 4.12 | 0.33 | 25.90 | |||||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 2.17 | 1.84 | 1.55 | 1.20 | 1.30 | 1.11 | 1.19 | 2.19 | 4.04 | 4.24 | 2.89 | 2.43 | 24.15 | |||||||||||||
| S.D. | 1.93 | 1.36 | 1.12 | 0.76 | 0.79 | 0.56 | 0.76 | 1.09 | 1.87 | 1.62 | 2.18 | 1.63 | 3.51 | |||||||||||||
| SKEW | 1.13 | 0.72 | 1.22 | 0.52 | 0.85 | 0.81 | 1.32 | 0.46 | 0.82 | 0.55 | 1.04 | 0.81 | -0.21 | |||||||||||||
| MAX | 7.64 | 5.47 | 5.24 | 2.68 | 3.57 | 2.58 | 3.79 | 4.30 | 9.54 | 8.59 | 8.39 | 6.50 | 30.99 | |||||||||||||
| MIN | 0.00 | 0.14 | 0.06 | 0.28 | 0.24 | 0.22 | 0.12 | 0.65 | 0.58 | 1.65 | 0.04 | 0.21 | 17.81 | |||||||||||||
| NO YRS | 29 | 31 | 29 | 24 | 27 | 30 | 30 | 28 | 27 | 30 | 28 | 29 | 14 | |||||||||||||