| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1974 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | s | 1.58 | 0.00 | 0.00 | 0.92 | 3.34 | 5.84 | 11.68 | |||||||
| 1975 | 7.69 | 5.87 | 5.15 | 2.21 | 0.69 | 0.80 | 0.99 | 0.96 | 0.09 | 5.37 | 5.79 | 7.07 | 42.68 | |||||||||||||
| 1976 | 4.53 | 4.05 | 5.13 | 1.58 | 0.79 | 0.49 | 0.50 | 2.63 | 0.50 | 0.76 | 0.81 | 0.62 | 22.39 | |||||||||||||
| 1977 | 1.03 | 1.35 | 3.99 | 0.58 | 2.78 | 1.59 | 0.25 | 1.43 | 1.72 | 0.00 | z | 0.00 | z | 0.00 | z | 14.72 | ||||||||||
| 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 | 0.31 | 0.00 | z | 0.00 | z | 0.31 | ||
| 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 | 3.21 | l | 0.00 | z | 0.00 | |
| 1980 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.01 | 0.01 | 0.51 | 0.68 | 4.67 | 7.77 | 13.65 | |||||||
| 1981 | 1.12 | 4.35 | 1.85 | 1.20 | 1.79 | 2.01 | 0.35 | 0.00 | 1.46 | 2.36 | 6.20 | 12.28 | a | 34.97 | ||||||||||||
| 1982 | 2.50 | 4.34 | 2.78 | 2.97 | 0.40 | 2.79 | 0.09 | 0.30 | 2.52 | a | 0.00 | z | 2.35 | b | 2.91 | f | 21.04 | |||||||||
| 1983 | 3.56 | 0.00 | z | 1.69 | y | 1.27 | 1.15 | 1.10 | j | 0.00 | z | 0.00 | z | 0.19 | u | 1.95 | 0.00 | z | 0.00 | z | 7.93 | |||||
| 1984 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.76 | j | 1.63 | b | 0.09 | c | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.72 | |
| 1985 | 0.13 | l | 3.71 | f | 2.23 | a | 1.66 | c | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 3.89 | |
| 1986 | 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 | |
| 1987 | 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 | 0.02 | 2.74 | e | 8.79 | f | 2.76 | ||
| 1988 | 4.73 | f | 0.90 | b | 3.25 | b | 2.04 | 1.97 | c | 1.76 | a | 0.00 | 0.00 | 0.67 | 0.00 | 11.18 | c | 5.87 | c | 27.64 | ||||||
| 1989 | 5.63 | e | 1.96 | b | 7.76 | i | 1.13 | a | 1.96 | 0.00 | b | 0.01 | 2.73 | b | 0.80 | g | 2.64 | 2.35 | a | 1.77 | 20.18 | |||||
| 1990 | 7.51 | b | 5.48 | e | 0.00 | z | 3.17 | e | 0.50 | q | 0.00 | z | 1.18 | j | 0.00 | z | 0.45 | h | 0.00 | z | 3.57 | b | 2.32 | c | 22.05 | |
| 1991 | 3.14 | b | 2.89 | 5.95 | c | 3.62 | q | 2.30 | i | 0.00 | z | 0.90 | g | 0.66 | d | 0.00 | 2.80 | 6.24 | d | 0.00 | z | 21.68 | ||||
| 1992 | 3.85 | e | 2.67 | 0.00 | z | 3.73 | b | 0.40 | a | 1.23 | d | 1.57 | b | 0.05 | 1.60 | v | 2.92 | e | 6.39 | h | 10.01 | a | 26.43 | |||
| 1993 | 8.63 | a | 3.92 | c | 3.00 | e | 0.70 | t | 3.95 | z | 1.70 | c | 0.96 | 1.28 | b | 0.40 | 0.89 | 1.82 | 2.63 | a | 25.23 | |||||
| 1994 | 3.29 | b | 1.89 | g | 0.79 | a | 0.48 | a | 0.34 | b | 0.19 | 0.28 | 0.00 | 0.55 | 2.22 | c | 6.87 | e | 1.84 | h | 15.01 | |||||
| 1995 | 3.43 | g | 2.30 | c | 3.07 | a | 0.59 | l | 0.20 | z | 1.35 | a | 2.41 | g | 0.00 | z | 1.26 | 2.02 | a | 6.58 | a | 8.47 | g | 16.58 | ||
| 1996 | 9.91 | 4.23 | b | 1.03 | a | 2.25 | e | 4.75 | h | 1.50 | w | 0.28 | 0.95 | 0.00 | z | 0.00 | z | 8.06 | o | 12.94 | e | 31.59 | ||||
| 1997 | 1.79 | h | 1.50 | b | 1.42 | z | 0.00 | z | 1.56 | i | 1.77 | a | 0.05 | a | 0.00 | b | 1.69 | 6.59 | 2.27 | f | 3.11 | e | 14.71 | |||
| 1998 | 9.12 | a | 4.77 | a | 3.57 | 0.98 | 4.22 | 0.61 | 2.20 | 1.10 | 0.42 | 1.60 | 13.76 | 7.53 | 49.88 | |||||||||||
| 1999 | 6.36 | 10.54 | b | 2.94 | a | 0.99 | 1.73 | 0.45 | 0.01 | 1.91 | a | 0.00 | 2.49 | 4.33 | a | 4.26 | 36.01 | |||||||||
| 2000 | 10.04 | 4.73 | 2.38 | 2.22 | 1.39 | 0.77 | 0.18 | 0.06 | 0.19 | 1.37 | 1.32 | 3.54 | 28.19 | |||||||||||||
| 2001 | 1.19 | c | 1.07 | 2.26 | 0.69 | b | 1.48 | 1.22 | b | 0.19 | 0.32 | 0.76 | 2.69 | 6.46 | 7.21 | 25.54 | ||||||||||
| 2002 | 5.46 | 2.80 | a | 2.80 | a | 1.37 | 0.32 | 0.13 | 0.16 | 0.11 | 0.40 | a | 0.45 | 2.15 | 7.18 | 23.33 | ||||||||||
| 2003 | 3.82 | 1.46 | a | 3.58 | 2.13 | 0.76 | 0.18 | 0.00 | 0.36 | 1.59 | 1.11 | 3.51 | 6.03 | 24.53 | ||||||||||||
| 2004 | 6.48 | a | 4.60 | 1.78 | 1.51 | 2.87 | 1.00 | 0.58 | 1.33 | 0.77 | 3.02 | 0.55 | 4.55 | 29.04 | ||||||||||||
| 2005 | 1.72 | 0.56 | 2.12 | a | 1.73 | 4.33 | 1.17 | 0.05 | 0.00 | 0.35 | 0.93 | 4.23 | 10.02 | a | 27.21 | |||||||||||
| 2006 | 6.81 | d | 2.18 | 3.03 | 0.28 | g | 0.00 | z | 1.84 | a | 0.00 | z | 0.32 | 0.18 | 0.00 | z | 5.28 | d | 0.00 | z | 19.64 | |||||
| 2007 | 0.00 | z | 3.23 | b | 0.91 | a | 1.73 | 0.12 | 0.83 | a | 0.81 | 0.21 | 0.86 | 4.07 | 4.79 | c | 4.62 | g | 17.56 | |||||||
| 2008 | 0.00 | z | 0.00 | z | 3.53 | f | 1.34 | d | 0.40 | c | 0.00 | z | 0.00 | z | 0.84 | 0.11 | 1.93 | a | 3.36 | b | 10.69 | d | 18.67 | |||
| 2009 | 2.76 | 3.29 | e | 6.87 | i | 1.12 | a | 1.20 | a | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 8.37 | ||
| 2010 | 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 | |
| 2011 | 3.52 | 3.42 | 7.08 | 2.56 | 1.86 | 0.82 | a | 0.90 | 0.11 | 0.23 | 2.00 | 4.02 | 4.50 | 31.02 | ||||||||||||
| 2012 | 8.91 | 5.59 | 9.33 | 2.54 | 1.60 | 2.61 | 0.00 | 0.10 | 0.00 | 2.26 | 6.89 | 12.28 | 52.11 | |||||||||||||
| 2013 | 2.63 | 1.60 | 1.70 | d | 0.20 | 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 | 5.93 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 5.05 | 3.42 | 3.27 | 1.74 | 1.50 | 1.16 | 0.46 | 0.63 | 0.66 | 2.01 | 4.64 | 6.52 | 32.84 | |||||||||||||
| S.D. | 2.85 | 2.06 | 1.98 | 0.82 | 1.16 | 0.75 | 0.59 | 0.79 | 0.66 | 1.51 | 2.95 | 3.55 | 9.86 | |||||||||||||
| SKEW | 0.30 | 1.35 | 1.40 | 0.59 | 1.07 | 0.37 | 1.50 | 1.35 | 1.17 | 1.21 | 1.29 | 0.28 | 0.89 | |||||||||||||
| MAX | 10.04 | 10.54 | 9.33 | 3.73 | 4.33 | 2.79 | 2.20 | 2.73 | 2.52 | 6.59 | 13.76 | 12.94 | 52.11 | |||||||||||||
| MIN | 1.03 | 0.56 | 0.79 | 0.48 | 0.12 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.55 | 0.62 | 22.39 | |||||||||||||
| NO YRS | 26 | 28 | 25 | 26 | 23 | 25 | 26 | 28 | 26 | 28 | 27 | 23 | 13 | |||||||||||||