| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1951 | ----- | z | ----- | z | 0.55 | a | 2.93 | 0.20 | ----- | z | ----- | z | 0.54 | b | 0.74 | ----- | z | ----- | z | ----- | z | 4.96 | g | |||
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 1.11 | 1.61 | 3.27 | 0.53 | 6.52 | g | |||||
| 1986 | 0.80 | 1.30 | 2.95 | 0.44 | 0.10 | 0.11 | 2.22 | 1.51 | a | 2.07 | 0.13 | 0.36 | 0.33 | 12.32 | ||||||||||||
| 1987 | 1.23 | 0.96 | 0.96 | 0.05 | 1.23 | 0.00 | 0.97 | a | 0.00 | a | 0.00 | 1.59 | a | 4.63 | a | 1.04 | d | 12.66 | ||||||||
| 1988 | 1.26 | 0.33 | 0.35 | 3.09 | 0.17 | 0.60 | 0.00 | 0.89 | 0.00 | a | 0.00 | a | 0.56 | 0.96 | g | 7.25 | a | |||||||||
| 1989 | 0.63 | 0.28 | 0.72 | 0.11 | 0.67 | 0.12 | 0.44 | 0.78 | 0.05 | 0.19 | 0.00 | 0.00 | 3.99 | |||||||||||||
| 1990 | 1.81 | 0.79 | 0.44 | 1.29 | 1.18 | 0.65 | 0.73 | 0.55 | 1.70 | 0.10 | 0.76 | 0.00 | 10.00 | |||||||||||||
| 1991 | 0.00 | 0.66 | 3.99 | 0.00 | 0.85 | 0.28 | 0.12 | 1.07 | 1.29 | 0.73 | 0.43 | c | 1.12 | 10.54 | ||||||||||||
| 1992 | 2.18 | 3.95 | 6.28 | 0.33 | 1.11 | 0.22 | 0.49 | 0.17 | b | 0.00 | 2.50 | 0.00 | 1.48 | 18.71 | ||||||||||||
| 1993 | 5.81 | 5.08 | 1.56 | 0.20 | 0.13 | 1.16 | 0.00 | 0.87 | a | 0.03 | 0.41 | 0.91 | 0.48 | 16.64 | ||||||||||||
| 1994 | 0.60 | a | 2.51 | 1.47 | 1.41 | a | 0.06 | 0.00 | a | 0.00 | 0.91 | 0.26 | 0.66 | 1.29 | 2.21 | 11.38 | ||||||||||
| 1995 | 4.73 | 1.77 | 4.73 | 2.03 | 1.54 | 0.79 | 0.19 | 0.00 | 0.00 | 0.00 | 0.27 | 0.30 | 16.35 | |||||||||||||
| 1996 | 0.27 | 1.69 | 0.64 | 0.02 | 0.42 | 0.00 | 1.42 | 0.35 | 0.03 | 1.60 | 1.51 | 1.45 | 9.40 | |||||||||||||
| 1997 | 2.10 | 0.65 | 0.00 | 0.03 | 0.07 | 0.08 | 0.09 | 0.33 | 3.06 | 0.21 | 1.47 | 0.63 | 8.72 | |||||||||||||
| 1998 | 0.62 | 8.01 | 2.37 | 1.38 | 0.53 | 0.70 | b | 6.06 | 0.88 | 3.22 | 0.63 | 0.56 | 0.02 | 24.98 | ||||||||||||
| 1999 | 0.30 | 0.25 | 0.14 | 2.39 | 0.20 | 1.10 | 1.39 | 0.43 | 0.17 | 0.00 | 0.00 | 0.00 | 6.37 | |||||||||||||
| 2000 | ----- | z | 4.92 | 2.14 | 0.06 | 0.02 | 0.52 | 0.00 | 2.58 | a | 0.00 | 0.59 | j | 0.00 | c | 0.06 | 10.30 | b | ||||||||
| 2001 | 2.79 | 1.58 | 1.92 | 1.33 | 0.21 | 0.00 | 0.95 | 0.65 | 0.14 | 0.18 | 0.34 | y | 0.60 | 10.35 | a | |||||||||||
| 2002 | 0.28 | 0.04 | 0.35 | 0.69 | a | 0.00 | 0.00 | 0.00 | 0.00 | 1.43 | 0.82 | c | 0.43 | 0.19 | 4.23 | |||||||||||
| 2003 | 0.67 | 1.99 | 0.82 | 1.22 | 0.30 | 0.00 | 0.31 | 1.30 | 0.47 | 0.26 | 0.94 | 2.07 | 10.35 | |||||||||||||
| 2004 | 0.10 | 3.85 | 0.55 | 2.10 | 0.47 | 0.07 | 0.23 | 0.69 | 0.35 | 5.18 | a | 2.48 | 2.66 | 18.73 | ||||||||||||
| 2005 | 6.49 | a | 3.31 | 2.38 | b | 1.75 | a | 0.24 | 0.58 | a | 0.65 | a | 4.95 | t | 0.02 | 1.27 | 0.14 | 0.13 | 16.96 | a | ||||||
| 2006 | 0.66 | 0.20 | 2.79 | 0.48 | 0.01 | 0.42 | 1.60 | x | 0.04 | a | 0.24 | a | 1.45 | a | 0.00 | 0.79 | 7.08 | a | ||||||||
| 2007 | 0.26 | 0.30 | 0.12 | 1.27 | 0.01 | 0.00 | 2.52 | a | 2.52 | a | 1.24 | 0.03 | 0.00 | 3.28 | 11.55 | |||||||||||
| 2008 | ----- | z | 1.75 | 0.24 | 0.00 | 0.93 | a | 0.00 | 0.00 | 0.51 | 0.10 | 0.39 | 0.78 | ----- | z | 4.70 | b | |||||||||
| 2009 | 0.31 | 3.76 | 0.00 | 0.64 | 0.10 | a | 0.24 | 0.25 | 0.49 | 0.10 | 0.06 | 0.07 | 1.64 | 7.66 | ||||||||||||
| 2010 | 4.24 | 1.87 | 0.63 | 0.16 | c | 0.04 | 0.35 | 0.25 | 0.44 | ----- | z | 2.47 | x | 0.54 | y | 6.40 | u | 7.98 | d | |||||||
| 2011 | 0.00 | 1.30 | 1.24 | 0.25 | 0.98 | 0.00 | 0.45 | 0.85 | 0.31 | 2.21 | 0.61 | 0.00 | 8.20 | |||||||||||||
| 2012 | 0.89 | b | 0.78 | 0.78 | 0.68 | 0.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | h | 0.00 | r | 3.13 | g | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.56 | 2.00 | 1.47 | 0.94 | 0.42 | 0.31 | 0.79 | 0.72 | 0.67 | 0.89 | 0.86 | 0.88 | 11.73 | |||||||||||||
| S.D. | 1.85 | 1.90 | 1.54 | 0.93 | 0.45 | 0.35 | 1.29 | 0.66 | 0.93 | 1.16 | 1.13 | 0.93 | 5.35 | |||||||||||||
| SKEW | 1.49 | 1.42 | 1.53 | 0.84 | 0.99 | 1.00 | 2.96 | 1.49 | 1.54 | 2.22 | 2.00 | 1.06 | 0.76 | |||||||||||||
| MAX | 6.49 | 8.01 | 6.28 | 3.09 | 1.54 | 1.16 | 6.06 | 2.58 | 3.22 | 5.18 | 4.63 | 3.28 | 24.98 | |||||||||||||
| MIN | 0.00 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.99 | |||||||||||||
| YRS | 25 | 27 | 28 | 28 | 28 | 26 | 25 | 27 | 27 | 25 | 25 | 24 | 19 | |||||||||||||