| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1981 | 0.00 | z | 0.32 | 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 | 0.32 | ||
| 1982 | 5.45 | d | 0.10 | 1.83 | b | 0.94 | 1.41 | 2.15 | 0.47 | 1.84 | 0.40 | 1.39 | 1.10 | 1.95 | 19.03 | |||||||||||
| 1983 | 0.00 | z | 0.00 | 0.03 | 0.28 | 0.22 | d | 0.86 | r | 0.04 | 0.43 | 1.25 | n | 0.16 | 0.00 | 4.43 | y | 1.16 | ||||||||
| 1984 | 1.82 | 0.03 | 0.48 | 0.57 | 1.18 | 0.51 | 1.11 | 1.59 | a | 1.08 | 0.27 | 0.18 | 2.22 | h | 8.82 | |||||||||||
| 1985 | 2.93 | e | 0.59 | 1.04 | d | 0.83 | f | 0.47 | 0.00 | 0.87 | 0.37 | 0.85 | 0.18 | 3.71 | 0.00 | z | 11.01 | |||||||||
| 1986 | 0.16 | 3.65 | 0.27 | 0.98 | 0.40 | 0.60 | 0.39 | 0.14 | 1.26 | 1.01 | 1.91 | 0.51 | 11.28 | |||||||||||||
| 1987 | 0.22 | 0.36 | 0.45 | 2.26 | 0.41 | 0.20 | 1.07 | 0.84 | 0.13 | 0.32 | 0.35 | 5.70 | 12.31 | |||||||||||||
| 1988 | 2.26 | 0.27 | 0.97 | 0.35 | 0.11 | 0.47 | 0.14 | 0.28 | 0.24 | 1.06 | 1.79 | 1.72 | 9.66 | |||||||||||||
| 1989 | 0.22 | 5.39 | 4.01 | 0.49 | 2.97 | 0.22 | 1.61 | 2.62 | 1.57 | 0.35 | 0.51 | 1.13 | 21.09 | |||||||||||||
| 1990 | 3.73 | 3.19 | b | 3.22 | 0.28 | 0.65 | 0.10 | 0.07 | 0.14 | 1.81 | 1.51 | 3.86 | b | 4.75 | 23.31 | |||||||||||
| 1991 | 2.60 | 0.09 | 1.38 | 0.00 | 0.40 | 0.40 | 1.83 | 0.20 | 0.83 | 0.23 | 0.14 | 1.03 | 9.13 | |||||||||||||
| 1992 | 0.83 | 0.40 | 0.70 | 0.03 | 0.55 | 0.62 | 1.40 | a | 0.74 | 2.28 | 0.10 | 3.43 | 0.40 | 11.48 | ||||||||||||
| 1993 | 3.45 | 0.52 | 0.25 | 0.03 | 0.16 | 0.07 | 0.18 | 0.58 | 0.05 | 2.84 | 0.00 | 0.00 | 8.13 | |||||||||||||
| 1994 | 0.75 | 2.86 | 0.59 | 0.00 | 0.24 | 0.00 | 0.43 | 1.10 | 0.37 | 0.00 | 0.05 | 0.30 | 6.69 | |||||||||||||
| 1995 | 0.00 | 1.80 | 1.70 | 2.50 | 0.16 | 0.00 | 0.45 | 0.10 | 0.00 | 0.00 | 0.08 | 0.86 | 7.65 | |||||||||||||
| 1996 | 2.50 | 0.45 | 2.20 | 1.50 | 0.00 | 0.54 | 0.95 | 1.10 | 2.13 | 0.24 | 1.18 | 6.30 | 19.09 | |||||||||||||
| 1997 | 4.36 | a | 0.50 | 3.00 | 0.18 | 1.30 | 2.40 | 0.80 | 1.65 | 0.95 | 2.10 | 1.60 | 1.10 | 19.94 | ||||||||||||
| 1998 | 0.93 | 0.00 | 0.26 | 0.03 | 0.60 | 0.27 | 0.02 | 0.10 | 1.32 | 0.22 | 0.10 | 0.00 | 3.85 | |||||||||||||
| 1999 | 1.18 | 0.08 | 0.14 | 0.10 | 0.35 | 0.02 | 0.00 | 0.02 | 0.34 | 2.21 | 0.16 | 0.23 | 4.83 | |||||||||||||
| 2000 | 0.10 | c | 0.00 | 0.04 | b | 0.02 | 1.08 | 0.56 | c | 0.06 | 0.95 | 1.03 | b | 0.00 | 4.30 | b | 1.45 | 9.59 | ||||||||
| 2001 | 0.01 | 3.22 | b | 0.15 | 0.16 | 0.31 | 0.47 | d | 0.57 | c | 0.00 | 0.23 | c | 0.01 | 4.05 | 0.81 | 9.99 | |||||||||
| 2002 | 1.26 | e | 0.14 | 0.24 | e | 0.28 | 1.67 | 0.38 | b | 0.03 | 1.37 | f | 0.46 | d | 4.75 | b | 0.14 | d | 0.00 | 9.35 | ||||||
| 2003 | 2.23 | e | 0.13 | 1.90 | d | 0.76 | b | 0.12 | b | 0.23 | 0.10 | 0.00 | b | 0.26 | c | 0.87 | b | 0.74 | d | 1.24 | b | 8.58 | ||||
| 2004 | 3.33 | e | 0.00 | b | 5.06 | b | 1.61 | e | 2.83 | d | 0.67 | n | 1.34 | d | 2.12 | g | 0.07 | b | 1.09 | 1.83 | e | 0.03 | e | 17.19 | ||
| 2005 | 5.13 | f | 2.05 | a | 2.20 | e | 0.05 | b | 0.82 | c | 2.69 | g | 2.42 | d | 1.65 | c | 0.79 | g | 0.13 | 0.42 | d | 0.48 | d | 10.22 | ||
| 2006 | 0.69 | d | 0.10 | e | 3.25 | i | 0.08 | 0.28 | g | 0.39 | b | 1.48 | c | 0.01 | 0.18 | e | 2.51 | b | 0.02 | b | 0.25 | b | 5.71 | |||
| 2007 | 0.72 | e | 1.54 | b | 0.22 | b | 0.09 | 0.50 | c | 1.92 | e | 2.01 | d | 0.09 | b | 0.37 | g | 0.07 | b | 1.87 | g | 5.52 | f | 7.16 | ||
| 2008 | 0.18 | 0.62 | b | 0.18 | a | 0.56 | f | 2.29 | g | 0.55 | d | 0.01 | 0.26 | d | 0.72 | e | 1.22 | b | 0.03 | b | 2.86 | f | 3.77 | |||
| 2009 | 3.27 | e | 0.01 | 0.80 | b | 0.91 | e | 0.43 | 0.13 | b | 0.18 | 0.81 | c | 0.05 | b | 0.13 | b | 0.23 | 0.63 | 7.58 | ||||||
| 2010 | 0.06 | b | 0.23 | 0.22 | b | 0.87 | c | 0.02 | 0.57 | j | 0.81 | g | 0.94 | g | 0.03 | e | 0.45 | d | 0.25 | b | 2.94 | S | 2.13 | |||
| 2011 | 1.49 | h | 2.76 | e | 0.61 | c | 1.45 | S | 1.98 | 0.38 | 0.23 | S | 0.09 | 0.14 | b | 0.24 | 0.02 | b | 0.12 | 8.02 | ||||||
| 2012 | 0.33 | 0.41 | 0.11 | S | 0.00 | a | 0.47 | 0.38 | S | 0.34 | 0.55 | e | 0.05 | S | 0.00 | 0.16 | b | 0.00 | e | 2.80 | ||||||
| 2013 | 1.59 | a | 0.00 | u | 0.67 | v | 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 | 1.59 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.63 | 0.99 | 1.14 | 0.58 | 0.75 | 0.52 | 0.69 | 0.65 | 0.67 | 0.83 | 1.08 | 1.24 | 11.30 | |||||||||||||
| S.D. | 1.51 | 1.38 | 1.29 | 0.70 | 0.78 | 0.63 | 0.69 | 0.69 | 0.67 | 1.09 | 1.40 | 1.74 | 6.00 | |||||||||||||
| SKEW | 0.77 | 1.58 | 1.48 | 1.35 | 1.60 | 2.06 | 0.90 | 1.17 | 0.98 | 1.90 | 1.25 | 1.98 | 0.67 | |||||||||||||
| MAX | 5.45 | 5.39 | 5.06 | 2.50 | 2.97 | 2.40 | 2.42 | 2.62 | 2.28 | 4.75 | 4.30 | 6.30 | 23.31 | |||||||||||||
| MIN | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.80 | |||||||||||||
| NO YRS | 29 | 32 | 30 | 29 | 29 | 27 | 30 | 28 | 28 | 31 | 30 | 25 | 20 | |||||||||||||