| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1970 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | h | 0.63 | 0.50 | 0.00 | 0.00 | 0.60 | 1.17 | 1.43 | 1.84 | 6.17 | |||||||||
| 1971 | 1.89 | 0.23 | 1.79 | 0.19 | 0.59 | 0.64 | 0.04 | 0.00 | 0.65 | 0.61 | 1.51 | 1.13 | 9.27 | |||||||||||||
| 1972 | 0.35 | c | 0.55 | 0.97 | 0.00 | z | 0.84 | 0.27 | 0.05 | 0.00 | 0.63 | 0.36 | 0.77 | 0.58 | 5.37 | |||||||||||
| 1973 | 1.60 | 0.46 | 0.34 | 0.08 | 1.12 | 0.13 | 0.00 | 0.19 | 0.50 | 0.25 | 3.36 | 2.61 | 10.64 | |||||||||||||
| 1974 | 1.17 | 0.62 | 1.12 | 0.49 | 0.17 | 0.00 | 1.06 | 0.22 | 0.00 | 0.44 | 0.04 | 1.34 | 6.67 | |||||||||||||
| 1975 | 1.07 | 1.71 | 1.55 | 1.92 | 0.03 | 1.89 | 0.42 | 0.17 | 0.00 | 0.51 | 0.29 | 0.83 | 10.39 | |||||||||||||
| 1976 | 0.97 | 1.09 | 0.27 | 0.10 | t | 0.23 | 0.69 | 0.80 | 1.82 | 0.86 | 0.11 | 0.01 | 0.02 | 6.87 | ||||||||||||
| 1977 | 0.38 | 0.77 | 0.01 | 0.00 | 1.92 | 0.25 | 0.06 | 0.57 | 0.73 | 0.06 | 1.22 | 1.62 | 7.59 | |||||||||||||
| 1978 | 2.95 | 1.28 | 1.83 | 2.09 | 0.17 | 0.13 | 0.86 | 0.10 | 1.05 | 0.00 | 0.86 | 0.00 | z | 11.32 | ||||||||||||
| 1979 | 2.02 | 1.35 | 1.09 | 0.33 | 0.98 | 0.14 | 0.00 | 1.80 | 0.43 | 0.17 | 0.59 | 0.84 | 9.74 | |||||||||||||
| 1980 | 0.65 | 1.23 | 0.64 | 0.48 | 1.26 | 2.01 | 0.21 | 0.00 | 0.32 | 2.90 | 0.59 | 1.38 | 11.67 | |||||||||||||
| 1981 | 1.10 | 0.70 | 1.55 | 0.41 | 1.72 | 0.38 | 0.20 | 0.07 | 0.36 | 1.20 | 3.39 | 3.30 | 14.38 | |||||||||||||
| 1982 | 1.20 | h | 1.18 | d | 0.83 | 0.90 | a | 0.93 | 1.47 | f | 0.96 | g | 0.00 | z | 0.00 | z | 1.55 | l | 1.08 | f | 1.87 | o | 3.84 | |||
| 1983 | 0.09 | i | 0.23 | n | 0.00 | z | 0.50 | n | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.45 | r | 3.19 | 3.14 | 6.33 | |||
| 1984 | 0.30 | 0.92 | 1.96 | 0.77 | 1.09 | 0.74 | 0.27 | 1.58 | 0.03 | 0.58 | 3.23 | 0.49 | 11.96 | |||||||||||||
| 1985 | 0.03 | 0.46 | 0.70 | 0.38 | 1.11 | 0.00 | 1.10 | 0.44 | 1.08 | 0.42 | 0.76 | 1.07 | 7.55 | |||||||||||||
| 1986 | 1.58 | 2.71 | 1.23 | 0.11 | 0.60 | 0.39 | 0.00 | 0.02 | 1.63 | 0.45 | 0.32 | 0.66 | 9.70 | |||||||||||||
| 1987 | 1.16 | 1.07 | 1.27 | 0.35 | 0.42 | 0.50 | 0.43 | 0.32 | 0.01 | 0.00 | 0.95 | 1.71 | 8.19 | |||||||||||||
| 1988 | 1.03 | 0.18 | 0.46 | 0.73 | 0.21 | 0.71 | 0.01 | 0.32 | 0.21 | 0.00 | 2.33 | 1.51 | 7.70 | |||||||||||||
| 1989 | 0.84 | 0.93 | 2.97 | 1.22 | 1.54 | 0.17 | 0.17 | 0.98 | 0.65 | 0.37 | 0.48 | 0.00 | a | 10.32 | ||||||||||||
| 1990 | 0.58 | 0.43 | 0.71 | 1.25 | 1.18 | 0.16 | 0.15 | 1.27 | 0.02 | 0.60 | 0.47 | 0.33 | 7.15 | |||||||||||||
| 1991 | 0.34 | 0.60 | 1.52 | 0.77 | 1.76 | 1.66 | 0.13 | 0.21 | 0.16 | 1.01 | 1.39 | 0.70 | 10.25 | |||||||||||||
| 1992 | 0.28 | 1.31 | 0.54 | 0.83 | 0.05 | 1.98 | 1.44 | 0.45 | 0.34 | 0.76 | 1.10 | 2.38 | 11.46 | |||||||||||||
| 1993 | 2.58 | 1.38 | 1.90 | 2.24 | 0.94 | 2.05 | a | 0.33 | 0.59 | 0.04 | 1.27 | 1.40 | a | 1.06 | 15.78 | |||||||||||
| 1994 | 0.66 | 0.95 | 0.08 | 0.63 | 1.00 | 0.66 | 0.54 | 0.00 | 0.44 | 0.33 | 2.27 | 1.15 | a | 8.71 | ||||||||||||
| 1995 | 3.62 | 0.38 | 2.56 | 1.41 | 1.42 | 0.82 | 0.89 | 0.30 | 0.10 | 0.28 | 1.25 | 2.66 | 15.69 | |||||||||||||
| 1996 | 1.74 | 1.16 | 1.71 | 1.14 | 2.08 | 0.48 | 0.08 | 0.40 | 0.59 | 0.91 | 1.42 | 4.00 | 15.71 | |||||||||||||
| 1997 | 2.63 | 0.08 | 0.15 | 0.94 | 0.46 | 1.14 | 0.59 | 0.18 | 0.32 | 0.14 | 1.14 | 0.57 | 8.34 | |||||||||||||
| 1998 | 2.15 | 2.28 | 1.33 | 1.35 | 3.58 | 1.07 | 0.36 | 0.06 | 1.22 | 0.02 | 2.29 | 0.93 | 16.64 | |||||||||||||
| 1999 | 1.79 | 2.32 | 0.38 | 0.37 | a | 0.19 | 0.46 | 0.02 | 0.62 | 0.00 | 0.79 | 0.54 | 0.87 | 8.35 | ||||||||||||
| 2000 | 1.73 | 2.94 | 1.26 | 0.53 | 0.40 | 0.54 | 0.43 | 0.00 | 1.71 | 2.19 | 1.15 | 0.56 | 13.44 | |||||||||||||
| 2001 | 1.06 | 0.55 | 0.79 | 0.99 | 0.41 | 0.74 | 1.04 | 0.23 | 0.64 | 0.47 | 1.70 | 1.34 | 9.96 | |||||||||||||
| 2002 | 0.71 | 0.20 | 0.27 | 0.65 | 0.04 | 0.42 | 0.11 | 0.23 | 0.10 | 0.03 | 0.32 | 2.19 | 5.27 | |||||||||||||
| 2003 | 1.53 | 0.17 | 1.04 | 1.60 | 1.26 | 0.07 | 0.56 | 0.95 | 0.17 | 0.18 | 0.91 | 1.45 | 9.89 | |||||||||||||
| 2004 | 1.93 | 1.35 | 0.38 | 0.24 | 1.10 | 2.19 | 0.04 | 1.49 | 0.42 | 2.88 | 0.68 | 1.61 | 14.31 | |||||||||||||
| 2005 | 1.47 | 0.15 | 1.35 | 1.46 | 3.46 | 1.29 | 0.58 | 0.00 | 0.09 | 0.99 | 2.02 | 4.90 | 17.76 | |||||||||||||
| 2006 | 1.73 | 0.50 | 1.88 | 1.31 | 1.17 | 1.23 | 0.14 | 0.00 | 0.25 | 0.46 | 1.07 | 1.06 | 10.80 | |||||||||||||
| 2007 | 0.09 | 1.35 | 0.21 | 1.08 | 0.44 | 0.51 | 0.04 | 0.12 | 0.48 | 0.60 | 1.16 | 1.18 | 7.26 | |||||||||||||
| 2008 | 1.47 | 1.68 | 0.51 | 0.40 | 1.90 | e | 0.44 | 0.22 | 0.12 | 0.40 | 0.27 | 1.01 | 1.56 | 9.98 | ||||||||||||
| 2009 | 0.52 | 0.64 | 0.61 | b | 0.47 | 1.32 | 3.01 | 0.04 | 0.18 | 0.00 | 0.97 | b | 0.39 | a | 2.36 | a | 10.51 | |||||||||
| 2010 | 2.56 | c | 1.20 | 1.19 | h | 0.92 | a | 0.68 | a | 1.29 | 0.51 | a | 0.28 | b | 0.01 | 1.11 | c | 1.01 | b | 3.34 | d | 12.91 | ||||
| 2011 | 0.66 | 0.41 | 2.17 | 0.68 | 2.25 | 1.04 | 0.01 | 0.10 | 0.00 | 1.48 | 0.54 | 0.17 | a | 9.51 | ||||||||||||
| 2012 | 2.14 | 0.19 | 1.13 | 0.65 | j | 0.51 | 0.45 | 0.35 | 0.05 | 0.00 | 0.69 | 2.47 | 1.89 | 9.87 | ||||||||||||
| 2013 | 0.41 | 0.06 | 0.18 | 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 | 0.65 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.30 | 0.95 | 1.05 | 0.83 | 1.03 | 0.81 | 0.35 | 0.40 | 0.42 | 0.68 | 1.26 | 1.52 | 10.64 | |||||||||||||
| S.D. | 0.85 | 0.70 | 0.72 | 0.56 | 0.82 | 0.71 | 0.37 | 0.51 | 0.43 | 0.69 | 0.90 | 1.09 | 3.10 | |||||||||||||
| SKEW | 0.60 | 1.03 | 0.58 | 0.74 | 1.31 | 1.21 | 1.17 | 1.63 | 1.30 | 1.80 | 0.99 | 1.12 | 0.67 | |||||||||||||
| MAX | 3.62 | 2.94 | 2.97 | 2.24 | 3.58 | 3.01 | 1.44 | 1.82 | 1.71 | 2.90 | 3.39 | 4.90 | 17.76 | |||||||||||||
| MIN | 0.03 | 0.06 | 0.01 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 5.27 | |||||||||||||
| NO YRS | 41 | 42 | 41 | 38 | 42 | 41 | 41 | 41 | 41 | 41 | 42 | 41 | 35 | |||||||||||||