YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | 78.29 | 83.07 | 92.77 | 88.93 | a | 78.37 | 65.26 | 47.23 | 44.13 | 72.26 | d | |||||||
1974 | 37.87 | 47.07 | 51.48 | 59.55 | a | ----- | z | 87.60 | 88.12 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.72 | g | ||||
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 | 80.81 | 77.17 | 63.94 | 45.23 | 39.47 | a | 61.32 | g | ||||
1994 | 45.81 | 43.57 | 56.08 | g | 62.88 | d | 70.10 | 80.93 | 90.81 | 89.58 | 79.77 | 62.29 | 41.00 | 36.37 | a | 63.92 | a | |||||||||
1995 | 40.84 | 56.00 | 51.29 | 56.27 | 65.00 | a | 73.73 | 85.03 | 85.39 | 79.83 | 64.81 | 58.03 | 40.39 | 63.05 | ||||||||||||
1996 | 42.71 | 43.79 | 55.23 | a | 59.25 | b | 65.84 | 77.93 | 90.06 | 87.58 | 73.87 | 63.45 | 51.90 | 44.63 | a | 63.02 | ||||||||||
1997 | 41.35 | 45.29 | 56.33 | a | 55.97 | 73.83 | a | 76.47 | 85.23 | 86.68 | 77.34 | a | 62.37 | a | 51.93 | a | 39.00 | a | 62.65 | |||||||
1998 | 47.00 | a | 42.96 | a | 53.17 | a | 55.97 | 60.58 | 71.60 | 90.37 | a | 88.40 | a | 77.36 | b | 61.45 | b | 47.00 | a | 36.81 | 61.05 | |||||
1999 | 44.50 | a | 43.68 | 51.68 | 55.89 | b | 66.69 | b | 76.96 | c | 87.00 | b | 85.07 | a | 76.45 | a | 69.68 | c | 57.46 | d | 43.52 | 63.21 | ||||
2000 | 42.32 | 47.61 | a | 52.76 | b | 65.07 | b | 69.48 | b | 82.54 | d | 89.56 | d | 89.61 | c | 75.65 | d | 62.59 | d | 42.33 | c | 42.42 | g | 65.41 | a | |
2001 | 36.29 | 42.62 | l | 54.32 | 55.89 | b | 74.89 | d | 79.77 | d | 86.00 | b | 90.67 | d | 80.04 | c | 67.93 | b | 53.04 | b | 38.72 | b | 65.23 | a | ||
2002 | 39.68 | c | 46.18 | 50.07 | b | 62.41 | a | 66.86 | c | 80.59 | c | 92.55 | 84.78 | h | 77.52 | a | 61.34 | b | 50.50 | d | 46.12 | e | 61.26 | a | ||
2003 | 47.68 | c | 46.60 | c | 55.61 | c | 54.92 | d | 68.13 | a | 82.14 | h | 94.96 | e | 86.35 | k | 79.63 | c | 70.92 | f | 44.69 | a | 42.45 | b | 59.41 | c |
2004 | 37.13 | h | 41.84 | d | 59.68 | c | 62.04 | b | 68.11 | c | 80.12 | e | 89.87 | h | 82.17 | m | 76.36 | b | 64.86 | i | 46.70 | g | 41.95 | l | 64.69 | f |
2005 | 37.90 | j | 47.22 | j | 63.18 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.32 | 50.36 | b | 39.50 | a | 52.06 | i | |
2006 | 44.14 | b | 45.74 | a | 46.84 | 58.54 | b | 72.73 | a | 83.27 | 94.58 | 87.48 | 79.24 | a | 66.23 | 50.70 | 40.81 | 64.19 | ||||||||
2007 | 40.32 | 48.73 | b | 60.17 | b | 60.86 | b | 75.26 | 82.45 | a | 94.97 | 90.39 | 77.50 | 62.23 | 53.67 | 36.94 | 65.29 | |||||||||
2008 | 34.97 | 46.07 | 52.00 | 58.43 | 68.73 | a | 79.37 | 91.84 | 89.97 | 80.73 | s | 67.66 | b | 55.50 | 41.07 | a | 62.33 | a | ||||||||
2009 | 43.45 | b | 45.54 | 52.11 | l | 59.97 | a | 75.10 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.01 | h | |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.31 | a | 63.25 | c | 47.40 | 41.19 | 58.04 | h | ||
2011 | 40.42 | 44.39 | 50.10 | 53.41 | c | 61.23 | 72.00 | a | 86.93 | b | 89.83 | b | 84.21 | a | 67.15 | d | 48.00 | d | 43.59 | b | 61.77 | |||||
2012 | 44.32 | 46.44 | d | 53.61 | 63.50 | 70.35 | 78.27 | 91.32 | 91.50 | a | 83.57 | 69.72 | f | 53.00 | 40.26 | 65.10 | a | |||||||||
2013 | 30.29 | 45.21 | 56.16 | 61.97 | 70.42 | 80.17 | a | 93.70 | a | 88.07 | a | 74.83 | 60.65 | 52.13 | 36.78 | h | 64.87 | a | ||||||||
2014 | 48.17 | h | 53.41 | f | 56.42 | g | 62.81 | c | 70.74 | l | 80.05 | h | 93.36 | t | 86.50 | a | 79.60 | 68.70 | a | 51.85 | j | 44.10 | a | 68.34 | g | |
2015 | 42.93 | a | 54.46 | b | 61.03 | a | 62.03 | 67.05 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.12 | h | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 41.42 | 46.38 | 53.97 | 59.41 | 69.56 | 79.27 | 90.45 | 88.03 | 78.43 | 64.59 | 50.06 | 41.00 | 63.03 | |||||||||||||
S.D. | 4.31 | 3.55 | 3.77 | 3.32 | 4.73 | 4.10 | 3.38 | 2.62 | 2.60 | 2.74 | 4.66 | 2.83 | 1.32 | |||||||||||||
SKEW | -0.89 | 1.56 | 0.30 | -0.13 | -0.12 | -0.24 | -0.27 | -1.19 | 0.50 | 0.33 | -0.19 | 0.02 | 0.22 | |||||||||||||
MAX | 47.68 | 56.00 | 61.03 | 65.07 | 78.29 | 87.60 | 94.97 | 91.50 | 84.21 | 69.68 | 58.03 | 46.12 | 65.29 | |||||||||||||
MIN | 30.29 | 41.84 | 46.84 | 53.41 | 60.58 | 71.60 | 85.03 | 80.81 | 73.87 | 60.65 | 41.00 | 36.37 | 61.05 | |||||||||||||
YRS | 19 | 19 | 18 | 21 | 19 | 18 | 17 | 17 | 20 | 19 | 20 | 19 | 8 |