YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.69 | o | ----- | z |
1967 | 33.28 | o | ----- | z | ----- | z | 37.24 | e | ----- | z | 56.60 | a | 72.12 | a | 72.00 | e | 61.13 | g | 52.33 | h | 40.30 | o | 25.46 | g | 59.49 | h |
1968 | ----- | z | 37.85 | e | 39.17 | g | 41.69 | i | 50.87 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.36 | j |
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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | 47.67 | 55.50 | 68.43 | a | 76.87 | 69.90 | 61.26 | a | 45.34 | 37.27 | f | 30.02 | d | 56.87 | d | |||||
2003 | 35.62 | s | 32.18 | n | 39.08 | s | 43.57 | a | 56.32 | a | 66.81 | a | 77.03 | 72.77 | 61.81 | a | 54.79 | 33.92 | d | 30.18 | 55.24 | c | ||||
2004 | 23.29 | 27.87 | b | 45.00 | 47.28 | a | 56.03 | 66.48 | 71.81 | 69.16 | 60.42 | 47.31 | 33.86 | a | 31.23 | a | 48.31 | |||||||||
2005 | 31.61 | 32.82 | 38.03 | 45.02 | 53.95 | a | 60.95 | 75.11 | 70.16 | 59.10 | 48.65 | 40.28 | e | 31.37 | 48.92 | |||||||||||
2006 | 31.23 | 31.09 | 34.02 | 47.62 | a | 57.77 | 67.92 | 75.15 | 70.50 | 58.53 | 47.47 | 37.67 | d | 27.68 | a | 48.89 | ||||||||||
2007 | 20.52 | 35.36 | 42.52 | a | 48.13 | 57.60 | 69.05 | a | 76.77 | 73.19 | 61.35 | 49.74 | 42.52 | a | 28.43 | a | 50.43 | |||||||||
2008 | 25.56 | 33.15 | b | 39.11 | 44.68 | 53.60 | 65.23 | 75.19 | 73.16 | 62.22 | 51.56 | 43.33 | 30.45 | a | 49.77 | |||||||||||
2009 | 33.76 | 34.46 | 40.63 | a | 45.22 | 58.94 | 61.05 | 72.53 | 69.85 | 66.28 | a | 46.72 | a | 41.02 | e | 23.21 | b | 49.47 | ||||||||
2010 | 30.66 | 32.79 | b | 39.23 | 44.43 | 48.66 | 65.50 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.55 | f | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.09 | 33.17 | 39.79 | 45.09 | 54.92 | 64.80 | 74.73 | 71.19 | 61.37 | 48.95 | 38.94 | 29.07 | 49.30 | |||||||||||||
S.D. | 4.96 | 2.95 | 3.48 | 3.19 | 3.22 | 4.01 | 2.09 | 1.59 | 2.36 | 3.04 | 3.89 | 2.69 | 0.75 | |||||||||||||
SKEW | -0.42 | -0.26 | -0.16 | -1.49 | -0.72 | -0.90 | -0.33 | 0.20 | 0.96 | 0.83 | -0.36 | -1.39 | 0.25 | |||||||||||||
MAX | 33.76 | 37.85 | 45.00 | 48.13 | 58.94 | 69.05 | 77.03 | 73.19 | 66.28 | 54.79 | 43.33 | 31.37 | 50.43 | |||||||||||||
MIN | 20.52 | 27.87 | 34.02 | 37.24 | 48.66 | 56.60 | 71.81 | 69.16 | 58.53 | 45.34 | 33.86 | 23.21 | 48.31 | |||||||||||||
YRS | 7 | 8 | 7 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 8 | 6 |