| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 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 | 1.82 | 2.54 | 4.36 | |||
| 1979 | 4.21 | 2.60 | 1.63 | 3.51 | 1.75 | 0.00 | 0.05 | 2.36 | 0.11 | 2.31 | 2.25 | 2.07 | 22.85 | |||||||||||||
| 1980 | 0.10 | z | 2.33 | 5.20 | 1.87 | 0.00 | z | 2.02 | 0.79 | 0.41 | 0.00 | z | 0.00 | z | 0.00 | z | 0.25 | a | 12.87 | |||||||
| 1981 | 0.00 | z | 0.41 | d | 0.00 | z | 2.40 | 2.99 | 0.53 | a | 0.00 | b | 0.00 | 0.67 | 2.55 | 3.22 | a | 3.19 | a | 15.96 | ||||||
| 1982 | 2.15 | d | 3.00 | f | 2.36 | h | 2.01 | f | 1.16 | 1.78 | f | 1.92 | j | 0.26 | d | 3.28 | e | 2.10 | c | 4.49 | f | 3.05 | g | 8.95 | ||
| 1983 | 2.75 | g | 1.30 | h | 5.33 | h | 1.20 | d | 4.25 | f | 1.11 | b | 1.45 | c | 3.09 | d | 0.22 | 1.18 | b | 6.97 | j | 7.95 | j | 8.25 | ||
| 1984 | 0.98 | d | 2.60 | 3.58 | 2.66 | 2.84 | 2.97 | b | 1.30 | 0.53 | 1.03 | 1.87 | a | 3.40 | f | 2.55 | 22.91 | |||||||||
| 1985 | 0.35 | 1.60 | b | 0.22 | 1.49 | 1.80 | 0.48 | 0.68 | 0.20 | 2.50 | c | 1.72 | 2.83 | a | 0.65 | c | 14.52 | |||||||||
| 1986 | 1.68 | 9.28 | e | 3.35 | f | 2.10 | d | 2.01 | 1.30 | a | 0.05 | 0.10 | 4.04 | e | 0.90 | 1.58 | a | 1.00 | d | 24.04 | ||||||
| 1987 | 3.35 | f | 2.45 | e | 2.63 | b | 0.40 | 2.85 | f | 1.83 | 1.25 | 0.20 | 0.00 | 0.05 | 1.86 | 3.00 | e | 13.67 | ||||||||
| 1988 | 4.15 | e | 1.20 | 2.32 | f | 1.92 | e | 1.95 | f | 1.66 | b | 0.20 | 0.00 | 0.43 | 0.00 | 7.15 | h | 2.09 | 11.65 | |||||||
| 1989 | 3.79 | c | 2.80 | 4.41 | h | 1.23 | b | 1.42 | 0.23 | 0.10 | 0.76 | b | 0.95 | b | 2.65 | b | 1.53 | 0.21 | b | 15.67 | ||||||
| 1990 | 2.43 | b | 4.73 | g | 1.31 | 3.82 | d | 3.02 | e | 0.67 | 1.03 | 0.65 | 0.19 | 0.47 | d | 1.82 | a | 1.88 | m | 15.41 | ||||||
| 1991 | 1.98 | g | 1.85 | c | 3.50 | h | 3.18 | f | 4.18 | i | 1.33 | 0.52 | 0.97 | d | 0.84 | 2.34 | b | 3.64 | f | 1.25 | d | 9.10 | ||||
| 1992 | 0.45 | 1.36 | c | 0.72 | 2.11 | b | 0.54 | a | 3.43 | a | 0.36 | 0.04 | b | 0.28 | 1.80 | 2.92 | f | 3.83 | 14.92 | |||||||
| 1993 | 3.26 | e | 2.14 | 3.94 | b | 4.96 | e | 2.11 | 2.92 | b | 1.34 | 1.46 | a | 0.03 | 1.46 | 0.62 | 0.99 | 25.23 | ||||||||
| 1994 | 2.32 | b | 2.90 | 0.27 | 1.99 | c | 1.21 | i | 0.46 | 0.05 | 0.06 | 0.26 | 1.16 | 3.15 | f | 2.76 | 12.23 | |||||||||
| 1995 | 3.04 | a | 1.23 | b | 3.28 | 3.18 | 4.48 | 2.08 | 1.71 | 0.21 | 0.58 | 0.98 | 4.16 | 3.39 | a | 28.32 | ||||||||||
| 1996 | 5.15 | c | 2.04 | f | 2.74 | d | 3.37 | d | 2.32 | 0.86 | b | 0.29 | b | 0.27 | 0.63 | 2.04 | 3.28 | d | 8.60 | g | 20.95 | |||||
| 1997 | 6.90 | b | 0.39 | 1.79 | d | 3.37 | b | 1.48 | d | 1.43 | 0.80 | 0.30 | 1.04 | 1.25 | b | 1.83 | 1.60 | 22.18 | ||||||||
| 1998 | 6.83 | 3.37 | f | 2.72 | e | 1.94 | a | 8.79 | e | 2.92 | d | 1.44 | b | 0.71 | 0.00 | z | 1.36 | 2.42 | 2.90 | c | 32.03 | |||||
| 1999 | 2.00 | b | 4.54 | o | 1.35 | e | 0.89 | f | 1.32 | b | 1.11 | 0.00 | 0.36 | 0.00 | 0.42 | 1.20 | j | 0.00 | z | 6.56 | ||||||
| 2000 | 4.12 | n | 3.64 | n | 1.88 | m | 1.41 | c | 1.36 | 0.38 | b | 0.00 | 0.05 | 0.58 | d | 4.78 | o | 1.43 | m | 2.45 | f | 3.78 | ||||
| 2001 | 2.90 | h | 0.71 | e | 3.09 | j | 2.92 | m | 1.18 | 0.78 | 1.41 | m | 0.00 | 0.21 | b | 1.31 | e | 2.34 | q | 3.44 | k | 4.19 | ||||
| 2002 | 2.64 | e | 1.20 | h | 0.00 | z | 1.57 | d | 0.92 | 0.78 | d | 0.00 | z | 0.02 | 1.00 | c | 0.39 | a | 1.24 | b | 4.13 | h | 8.56 | |||
| 2003 | 2.42 | e | 1.44 | d | 2.46 | i | 3.74 | j | 1.90 | e | 0.42 | a | 0.45 | 0.75 | d | 0.16 | c | 0.18 | b | 2.40 | k | 6.51 | l | 7.72 | ||
| 2004 | 5.18 | j | 3.39 | i | 0.00 | z | 0.00 | z | 5.11 | f | 1.38 | c | 0.36 | 1.34 | h | 0.45 | 3.26 | a | 1.09 | 3.42 | 9.96 | |||||
| 2005 | 0.62 | a | 1.63 | 3.00 | 3.92 | a | 6.37 | a | 1.65 | 0.09 | 0.25 | 1.01 | a | 1.39 | 4.27 | a | 5.47 | b | 29.67 | |||||||
| 2006 | 4.51 | 2.04 | 3.47 | a | 3.09 | 2.37 | 1.48 | e | 0.57 | 0.00 | 1.08 | a | 0.68 | 3.94 | 3.45 | b | 26.68 | |||||||||
| 2007 | 0.68 | 3.60 | a | 1.46 | 0.00 | z | 0.58 | 1.24 | 0.00 | z | 0.14 | 1.92 | 0.00 | z | 1.85 | b | 2.00 | b | 13.47 | |||||||
| 2008 | 3.56 | b | 3.27 | d | 2.88 | 1.56 | 3.16 | 1.15 | 0.07 | 0.16 | 0.00 | z | 0.00 | z | 3.16 | 4.98 | 23.95 | |||||||||
| 2009 | 2.44 | 1.08 | 0.00 | z | 2.58 | 2.24 | 4.53 | 0.25 | 0.00 | z | 0.00 | 3.41 | 0.00 | z | 3.21 | 19.74 | ||||||||||
| 2010 | 4.42 | 2.04 | 3.37 | 0.00 | z | 3.42 | h | 1.93 | 0.51 | 0.60 | 0.00 | z | 3.59 | 0.00 | z | 0.00 | z | 16.46 | ||||||||
| 2011 | 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 | |
| 2012 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.78 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.78 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 2.96 | 2.22 | 2.40 | 2.40 | 2.42 | 1.45 | 0.57 | 0.50 | 0.84 | 1.53 | 2.36 | 2.47 | 24.21 | |||||||||||||
| S.D. | 1.82 | 1.76 | 1.32 | 1.07 | 1.86 | 1.03 | 0.52 | 0.70 | 0.99 | 1.00 | 1.06 | 1.38 | 5.06 | |||||||||||||
| SKEW | 0.52 | 2.85 | 0.05 | 0.45 | 2.09 | 1.10 | 0.68 | 2.42 | 1.90 | 0.38 | 0.40 | 0.20 | -0.93 | |||||||||||||
| MAX | 6.90 | 9.28 | 5.20 | 4.96 | 8.79 | 4.53 | 1.71 | 3.09 | 4.04 | 3.59 | 4.27 | 5.47 | 29.67 | |||||||||||||
| MIN | 0.35 | 0.39 | 0.22 | 0.40 | 0.54 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.62 | 0.21 | 14.52 | |||||||||||||
| NO YRS | 24 | 23 | 19 | 24 | 24 | 31 | 29 | 30 | 28 | 28 | 19 | 23 | 7 | |||||||||||||