| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 0.00 | 0.86 | 0.03 | 0.57 | 1.46 | g | |||||
| 1975 | 0.44 | 0.98 | 0.51 | 0.36 | 0.39 | 0.25 | 0.00 | 0.90 | 0.81 | 0.37 | 0.27 | 0.14 | 5.42 | |||||||||||||
| 1976 | 0.27 | 0.38 | 0.19 | 0.48 | 0.00 | 0.45 | 1.65 | 1.38 | 0.90 | 0.45 | 0.02 | 0.00 | 6.17 | |||||||||||||
| 1977 | 0.43 | b | 0.43 | 0.29 | 0.00 | 0.81 | 0.98 | 0.16 | 0.00 | 0.01 | 0.00 | 0.11 | 1.79 | a | 5.01 | |||||||||||
| 1978 | 0.21 | 1.57 | 1.16 | 0.70 | 0.14 | 0.00 | 0.00 | 0.00 | 0.85 | 0.26 | 0.25 | 0.16 | 5.30 | |||||||||||||
| 1979 | 0.08 | c | 0.34 | a | ----- | z | 0.38 | 0.44 | 0.34 | 0.90 | 0.90 | 0.00 | 0.10 | 0.24 | 1.07 | 4.79 | a | |||||||||
| 1980 | 3.11 | d | 1.31 | ----- | z | 0.74 | 0.50 | 0.06 | 1.30 | a | 0.00 | 0.96 | 0.11 | 0.32 | 0.40 | 8.81 | a | |||||||||
| 1981 | 0.62 | 0.16 | 1.71 | 0.28 | 0.39 | 0.00 | 0.16 | 0.02 | 0.00 | 0.76 | 0.74 | 0.00 | 4.84 | |||||||||||||
| 1982 | 0.83 | ----- | z | 0.63 | 0.29 | 0.00 | 1.34 | 0.07 | 0.00 | 2.71 | 0.84 | 1.41 | b | ----- | z | 8.12 | b | |||||||||
| 1983 | 0.51 | 0.66 | 1.53 | 1.17 | 0.18 | 0.63 | 0.05 | 1.01 | a | 1.81 | 0.66 | 1.28 | j | 1.44 | a | 9.65 | a | |||||||||
| 1984 | 0.05 | 0.43 | 0.15 | b | 0.30 | 0.02 | 0.28 | 0.58 | 0.93 | 0.11 | 0.95 | 0.72 | 0.04 | 4.56 | ||||||||||||
| 1985 | 0.40 | a | 0.05 | 1.89 | 0.12 | 0.21 | 0.18 | 0.08 | a | 0.00 | 1.07 | 0.42 | 1.17 | 0.67 | 6.26 | |||||||||||
| 1986 | 0.35 | 2.27 | 0.43 | 0.14 | 0.11 | 0.06 | 0.63 | d | 0.11 | 0.34 | 0.25 | 0.08 | 0.11 | 4.88 | ||||||||||||
| 1987 | 0.09 | 0.44 | 0.52 | 0.68 | 1.87 | 0.58 | 0.00 | 0.00 | 0.00 | 0.64 | 0.43 | 0.40 | 5.65 | |||||||||||||
| 1988 | 0.40 | 0.02 | 0.23 | 1.01 | 0.15 | 0.17 | 0.29 | ----- | z | 0.18 | 0.00 | 1.52 | 0.57 | a | 4.54 | a | ||||||||||
| 1989 | 0.03 | b | 0.63 | 0.22 | a | 0.00 | 1.35 | 1.86 | 0.18 | 0.76 | b | 0.82 | 0.38 | 0.29 | a | 0.00 | a | 6.52 | ||||||||
| 1990 | 0.74 | 0.60 | 0.00 | 1.19 | d | 0.73 | a | 0.04 | a | 0.63 | c | 0.09 | 0.80 | c | 0.00 | 0.03 | 0.44 | 5.29 | ||||||||
| 1991 | 0.00 | 0.34 | 1.97 | 0.21 | 0.75 | b | 0.25 | 0.11 | 0.33 | 0.45 | 0.10 | 0.42 | a | 0.28 | 5.21 | |||||||||||
| 1992 | 0.20 | 0.66 | 0.48 | a | 0.00 | a | 0.11 | a | 0.50 | 0.34 | 0.76 | 0.32 | ----- | z | 0.00 | 1.04 | 4.41 | a | ||||||||
| 1993 | 0.57 | 0.84 | a | 0.55 | 0.00 | 0.08 | 0.93 | 0.00 | 0.01 | a | 0.09 | 0.92 | 0.25 | 0.40 | 4.64 | |||||||||||
| 1994 | 0.04 | 0.32 | 0.48 | a | 0.00 | 1.05 | 0.00 | 0.00 | 0.00 | 0.64 | 0.21 | y | 1.74 | 0.28 | 4.55 | a | ||||||||||
| 1995 | 1.32 | v | 0.31 | 0.62 | 0.42 | 2.29 | c | 0.99 | 0.08 | 0.04 | 0.14 | 0.00 | 0.06 | 1.39 | 6.34 | a | ||||||||||
| 1996 | 1.45 | 1.66 | 1.35 | 0.18 | 1.10 | 0.72 | 0.40 | 0.00 | 0.05 | 0.30 | 0.74 | 1.19 | 9.14 | |||||||||||||
| 1997 | 1.30 | 0.53 | 0.00 | 0.70 | 0.05 | 2.54 | 0.74 | 0.00 | 0.60 | 0.22 | 0.00 | a | 0.54 | 7.22 | ||||||||||||
| 1998 | 0.13 | a | 1.17 | 1.08 | 0.75 | 1.20 | 1.38 | 0.70 | 0.00 | 2.61 | g | 0.71 | 0.66 | 0.18 | 7.96 | a | ||||||||||
| 1999 | 0.21 | c | 0.19 | 0.00 | 0.85 | 0.07 | 0.36 | 0.00 | 0.69 | 0.00 | 0.06 | 0.00 | 0.10 | 2.53 | ||||||||||||
| 2000 | 1.38 | 0.42 | 0.63 | 0.29 | 0.34 | 0.00 | ----- | z | ----- | z | 0.39 | 0.28 | 0.00 | c | 0.00 | 3.73 | b | |||||||||
| 2001 | 0.00 | 0.00 | b | 0.00 | 0.00 | 0.00 | ----- | z | 0.00 | 0.00 | ----- | z | 0.00 | a | 0.60 | f | 1.22 | 1.22 | c | |||||||
| 2002 | 0.55 | a | 0.12 | 0.39 | 0.12 | b | 0.08 | 0.25 | 0.00 | 0.09 | 0.03 | 0.00 | 0.62 | e | 0.25 | 2.50 | ||||||||||
| 2003 | 0.25 | 0.48 | 0.13 | 0.45 | 0.00 | a | 0.00 | a | 0.21 | 1.06 | b | ----- | z | ----- | z | ----- | z | ----- | z | 2.58 | d | |||||
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2007 | 0.00 | a | 0.27 | e | 0.00 | 0.18 | ----- | z | 0.00 | 0.00 | 0.00 | 0.40 | 0.25 | 0.00 | g | ----- | z | 1.10 | c | |||||||
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | t | ----- | z | ----- | z | 0.00 | 0.00 | 0.00 | 0.00 | c | 0.00 | h | |||
| 2009 | 0.38 | 0.00 | 0.17 | 0.56 | 0.26 | 1.39 | 0.00 | 0.10 | 0.00 | 0.80 | ----- | z | ----- | z | 3.66 | b | ||||||||||
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | 0.80 | 0.00 | 0.00 | 0.00 | m | ----- | z | ----- | z | ----- | z | ----- | z | 0.80 | i | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.50 | 0.59 | 0.60 | 0.40 | 0.50 | 0.53 | 0.30 | 0.31 | 0.48 | 0.36 | 0.43 | 0.51 | 5.36 | |||||||||||||
| S.D. | 0.63 | 0.54 | 0.59 | 0.35 | 0.58 | 0.63 | 0.41 | 0.44 | 0.61 | 0.32 | 0.50 | 0.51 | 1.55 | |||||||||||||
| SKEW | 2.61 | 1.46 | 1.07 | 0.71 | 1.49 | 1.49 | 1.71 | 1.04 | 1.96 | 0.49 | 1.27 | 0.98 | 0.27 | |||||||||||||
| MAX | 3.11 | 2.27 | 1.97 | 1.19 | 2.29 | 2.54 | 1.65 | 1.38 | 2.71 | 0.95 | 1.74 | 1.79 | 9.14 | |||||||||||||
| MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.50 | |||||||||||||
| YRS | 30 | 30 | 29 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 28 | 29 | 17 | |||||||||||||