YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 95.10 | a | 87.00 | 80.58 | 68.07 | 57.74 | 77.70 | g | ||||
1976 | 57.16 | 62.62 | 64.77 | 72.93 | 83.16 | 93.40 | 93.03 | 92.37 | a | 84.23 | 74.03 | 65.63 | 57.26 | 75.05 | ||||||||||||
1977 | 54.94 | 64.79 | 62.00 | 76.23 | 79.74 | 93.70 | 94.29 | 94.77 | a | 88.41 | a | 79.81 | 68.07 | 61.45 | 76.52 | |||||||||||
1978 | 54.19 | 58.36 | 67.13 | a | 74.27 | 80.97 | 94.10 | 96.21 | b | 91.87 | 86.90 | 80.32 | 62.53 | 50.61 | 74.79 | |||||||||||
1979 | 48.74 | 59.25 | 62.81 | 74.23 | 78.97 | 90.30 | 94.94 | 90.74 | 90.17 | 82.87 | a | 61.73 | 57.87 | 74.38 | ||||||||||||
1980 | 54.83 | b | 60.24 | 61.97 | 73.80 | ----- | z | 94.27 | 98.29 | 92.10 | 88.57 | 77.35 | 66.50 | 62.03 | 75.45 | a | ||||||||||
1981 | 58.81 | 63.82 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.31 | j | ||
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | 58.81 | 62.31 | 63.90 | a | 76.69 | a | 86.61 | 90.90 | 94.45 | 91.55 | 89.80 | 71.23 | 54.48 | g | ----- | z | 78.62 | b | ||||||||
2001 | ----- | z | ----- | z | 70.48 | h | 74.27 | 88.23 | 96.04 | b | 95.48 | d | 94.29 | c | 93.00 | b | 82.20 | f | 70.20 | j | 55.69 | e | 85.28 | e | ||
2002 | 58.71 | g | 63.95 | g | 70.33 | j | 81.04 | f | 87.78 | d | 99.08 | d | 98.07 | d | 96.63 | d | 91.00 | d | 77.23 | e | 67.04 | c | 55.85 | e | 84.08 | d |
2003 | 64.55 | b | 58.61 | e | 66.33 | g | 73.96 | g | 86.81 | e | 95.85 | c | 100.37 | a | 96.24 | b | 91.26 | c | 86.20 | f | 64.64 | e | 56.70 | d | 79.45 | c |
2004 | 56.83 | h | 57.21 | e | 73.70 | d | 72.80 | 87.11 | c | 95.53 | k | 96.32 | ----- | z | ----- | z | 68.44 | v | 61.93 | a | 60.81 | 72.84 | e | |||
2005 | 60.13 | 60.68 | 68.13 | 79.17 | 89.20 | a | 95.86 | a | 100.73 | a | 94.33 | a | 92.10 | 81.58 | 72.38 | a | 63.03 | a | 79.78 | |||||||
2006 | 64.23 | 69.48 | a | 67.72 | b | 79.20 | 90.30 | a | 98.77 | 97.10 | 91.61 | 86.47 | 77.43 | a | 71.97 | 59.55 | 79.49 | |||||||||
2007 | 55.68 | 64.37 | a | 74.74 | 78.43 | 88.19 | 97.07 | 97.39 | 95.48 | 92.10 | a | 82.58 | 74.37 | 56.19 | 79.72 | |||||||||||
2008 | 57.16 | 63.36 | a | 71.77 | 78.52 | a | 82.60 | a | 97.00 | 94.61 | 93.20 | a | 89.24 | a | 81.80 | a | 69.93 | 56.07 | c | 77.94 | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.43 | 61.93 | 67.15 | 75.88 | 85.36 | 95.10 | 96.52 | 93.59 | 89.30 | 78.90 | 67.29 | 57.92 | 77.21 | |||||||||||||
S.D. | 4.37 | 3.35 | 4.60 | 2.46 | 3.79 | 2.68 | 2.29 | 1.91 | 2.53 | 3.57 | 4.07 | 3.25 | 2.32 | |||||||||||||
SKEW | -0.04 | 0.61 | 0.45 | 0.20 | -0.49 | -0.30 | 0.45 | 0.11 | -0.36 | -0.86 | 0.19 | -0.34 | -0.02 | |||||||||||||
MAX | 64.55 | 69.48 | 74.74 | 79.20 | 90.30 | 99.08 | 100.73 | 96.63 | 93.00 | 82.87 | 74.37 | 63.03 | 79.78 | |||||||||||||
MIN | 48.74 | 57.21 | 61.97 | 72.80 | 78.97 | 90.30 | 93.03 | 90.74 | 84.23 | 71.23 | 61.73 | 50.61 | 74.38 | |||||||||||||
YRS | 12 | 13 | 11 | 12 | 13 | 13 | 14 | 14 | 14 | 12 | 13 | 14 | 8 |