YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 68.93 | 62.48 | 65.71 | j | ||
1994 | 63.42 | 61.79 | 70.20 | a | 71.03 | a | 74.73 | a | 86.30 | 82.54 | c | 88.45 | 83.31 | a | 79.20 | u | 60.17 | a | 57.71 | 72.70 | a | |||||
1995 | 59.97 | 64.37 | a | 64.16 | 68.79 | a | 70.68 | 79.90 | 87.35 | 88.61 | 86.13 | 82.35 | 75.17 | 62.68 | 74.18 | |||||||||||
1996 | 63.06 | 65.36 | a | 68.19 | 73.93 | a | 79.29 | 86.42 | d | 93.00 | a | ----- | z | ----- | z | 77.10 | 67.33 | 62.26 | 73.59 | b | ||||||
1997 | 60.81 | 64.05 | f | 72.29 | c | 74.50 | b | 83.90 | a | 82.50 | b | 86.40 | a | 87.16 | ----- | z | ----- | z | 70.30 | c | 60.41 | b | 75.36 | c | ||
1998 | 61.57 | a | 58.22 | e | 63.74 | ----- | z | ----- | z | ----- | z | ----- | z | 89.42 | 81.66 | a | 70.71 | 60.57 | b | 53.83 | a | 67.46 | d | |||
1999 | 57.45 | 56.04 | 57.71 | 65.18 | b | 71.10 | 79.28 | a | 82.45 | 82.77 | ----- | z | 78.47 | a | ----- | z | 60.35 | 69.08 | b | |||||||
2000 | ----- | z | ----- | z | ----- | z | 70.23 | 76.19 | 82.53 | 82.87 | a | 85.06 | 81.72 | a | 68.86 | b | 57.96 | b | 59.19 | 73.85 | c | |||||
2001 | 56.43 | a | 55.58 | b | 63.83 | a | 63.79 | a | 83.45 | 87.11 | c | 80.93 | a | 84.93 | a | 80.62 | a | 75.50 | a | 66.04 | b | 56.90 | a | 71.26 | ||
2002 | 52.33 | a | 62.75 | 62.35 | 66.54 | b | 75.07 | a | 82.50 | d | 84.63 | a | 86.00 | a | 83.97 | 70.68 | 64.90 | a | 56.10 | 70.65 | ||||||
2003 | 60.87 | 57.54 | 63.90 | a | 61.34 | a | 73.94 | 80.86 | b | 90.38 | b | 83.80 | a | 83.96 | c | 79.27 | a | 60.96 | f | 56.63 | a | 72.04 | a | |||
2004 | 55.00 | d | 57.25 | a | 71.70 | a | 71.82 | b | 77.16 | 80.85 | c | 83.42 | g | 83.67 | a | 84.00 | 68.29 | 58.42 | d | 57.03 | 69.56 | a | ||||
2005 | 55.58 | 59.56 | a | 64.26 | 66.07 | b | 73.87 | 75.36 | h | 88.75 | s | 85.97 | 77.66 | a | 72.90 | 66.97 | a | 59.32 | 68.22 | b | ||||||
2006 | 57.03 | a | 62.14 | 57.10 | a | 63.59 | a | 76.48 | d | 84.73 | 91.42 | 81.81 | 82.27 | 71.75 | s | ----- | z | 56.50 | a | 71.31 | b | |||||
2007 | 55.61 | 58.79 | 68.52 | 71.73 | h | 76.40 | a | 83.90 | 84.65 | 87.10 | a | 77.72 | a | 71.97 | 66.83 | 54.16 | 71.42 | a | ||||||||
2008 | 53.64 | c | 57.90 | 65.42 | 70.21 | a | 75.65 | 85.27 | 86.13 | 88.35 | 83.30 | 79.19 | 66.33 | 54.26 | 72.14 | |||||||||||
2009 | 59.19 | 58.26 | a | 61.74 | 68.13 | 77.45 | 79.48 | a | 89.03 | 88.80 | a | 89.23 | ----- | z | ----- | z | 54.81 | 72.61 | b | |||||||
2010 | 57.10 | a | 58.52 | a | 62.61 | 63.70 | 72.47 | a | 82.27 | 82.79 | b | 84.00 | c | 84.13 | ----- | z | ----- | z | ----- | z | 71.95 | c | ||||
2011 | ----- | z | ----- | z | 61.48 | f | 65.80 | 71.23 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.51 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 58.07 | 59.60 | 64.86 | 67.79 | 75.83 | 82.93 | 86.04 | 85.99 | 82.83 | 74.61 | 65.38 | 57.92 | 72.06 | |||||||||||||
S.D. | 3.32 | 2.98 | 4.41 | 3.91 | 3.80 | 2.60 | 3.75 | 2.38 | 3.02 | 4.65 | 4.97 | 2.97 | 1.54 | |||||||||||||
SKEW | 0.06 | 0.60 | 0.06 | 0.18 | 0.73 | 0.16 | 0.47 | -0.15 | 0.05 | 0.14 | 0.09 | 0.26 | 0.66 | |||||||||||||
MAX | 63.42 | 65.36 | 72.29 | 74.50 | 83.90 | 87.11 | 93.00 | 89.42 | 89.23 | 82.35 | 75.17 | 62.68 | 74.18 | |||||||||||||
MIN | 52.33 | 55.58 | 57.10 | 61.34 | 70.68 | 79.28 | 80.93 | 81.81 | 77.66 | 68.29 | 57.96 | 53.83 | 70.65 | |||||||||||||
YRS | 16 | 15 | 16 | 16 | 17 | 15 | 14 | 16 | 14 | 12 | 13 | 17 | 4 |