YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.67 | 10.42 | 17.04 | j | ||
1968 | 13.85 | 22.19 | 26.60 | 27.38 | 39.05 | 47.55 | 56.61 | 50.58 | 45.39 | c | 36.03 | 20.77 | 11.45 | a | 33.12 | |||||||||||
1969 | 16.74 | b | 17.68 | 18.95 | 35.36 | a | 43.40 | 45.45 | 54.06 | 57.13 | 49.28 | 30.85 | d | 23.58 | 16.48 | 34.08 | ||||||||||
1970 | 16.77 | 22.09 | 20.39 | 23.32 | 39.98 | 50.17 | 56.00 | 57.77 | 41.50 | 31.88 | a | 25.08 | 15.24 | 33.35 | ||||||||||||
1971 | 16.19 | 16.68 | 21.42 | 29.65 | 41.79 | 49.18 | 54.24 | 59.48 | 42.67 | a | 34.18 | 23.28 | 12.73 | 33.46 | ||||||||||||
1972 | 12.11 | 19.43 | 28.16 | 31.62 | 41.21 | 50.03 | 52.95 | 54.65 | 42.22 | 35.55 | 21.87 | 10.35 | 33.35 | |||||||||||||
1973 | 13.10 | a | 20.21 | 23.40 | 27.23 | ----- | z | ----- | z | 55.21 | 55.38 | a | 45.57 | 38.15 | 23.47 | 17.58 | 31.93 | b | ||||||||
1974 | 12.95 | 18.62 | 23.03 | 33.05 | 37.27 | 50.95 | b | 57.50 | a | 51.87 | 46.42 | 38.65 | 22.88 | 12.32 | 33.79 | |||||||||||
1975 | 10.63 | 14.46 | 20.18 | 25.28 | 36.17 | b | 44.41 | a | 57.82 | a | 50.11 | 45.35 | 35.02 | 18.83 | 18.27 | 31.38 | ||||||||||
1976 | 13.58 | 17.40 | 17.48 | a | 31.98 | a | 42.10 | 46.77 | 56.87 | 52.61 | 47.97 | 34.85 | 25.85 | 13.76 | 33.44 | |||||||||||
1977 | 11.77 | a | 20.20 | 20.34 | 35.58 | 40.89 | 53.33 | 55.98 | 52.24 | 46.08 | 37.74 | 23.00 | a | 17.23 | 34.53 | |||||||||||
1978 | 17.25 | a | 18.54 | 27.44 | 34.03 | 39.18 | a | 48.30 | 54.40 | 51.95 | 45.84 | e | 37.75 | e | 19.71 | d | 2.42 | g | 35.85 | a | ||||||
1979 | 2.25 | c | 18.37 | a | 23.26 | 31.23 | b | 40.03 | 48.48 | d | 57.06 | 54.29 | 49.72 | ----- | z | ----- | z | 17.52 | e | 34.22 | b | |||||
1980 | 1.50 | v | 20.40 | 22.10 | f | 38.88 | q | 42.23 | a | ----- | z | ----- | z | 52.22 | b | ----- | z | 36.39 | ----- | z | ----- | z | 37.81 | h | ||
1981 | 15.60 | a | ----- | z | 27.08 | a | 33.90 | i | 41.21 | b | 47.88 | a | 56.35 | d | 56.87 | h | 50.43 | b | 34.23 | ----- | z | 19.17 | e | 36.49 | d | |
1982 | 12.81 | d | 15.22 | c | 24.91 | b | 24.13 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.27 | h |
1983 | ----- | z | ----- | z | 26.22 | a | 27.32 | b | 37.08 | 45.92 | e | 53.42 | f | 57.40 | f | 43.84 | a | 36.62 | c | 23.78 | 7.67 | k | 34.40 | e | ||
1984 | 12.96 | c | 14.87 | b | 24.29 | c | 26.94 | e | 39.50 | i | 46.03 | a | 56.45 | c | 55.61 | 41.30 | 29.82 | 19.56 | f | 7.65 | g | 34.25 | c | |||
1985 | 9.19 | 7.76 | c | 17.90 | b | 33.45 | 43.58 | 49.57 | 57.48 | 51.32 | 40.83 | 32.97 | 18.02 | b | 11.47 | a | 31.13 | |||||||||
1986 | 17.05 | 19.91 | 31.37 | 32.78 | 40.11 | 53.58 | 52.68 | 55.97 | 41.93 | 36.92 | 20.02 | 10.03 | 34.36 | |||||||||||||
1987 | 10.77 | 18.70 | 23.82 | 37.08 | 45.92 | 50.70 | o | 52.12 | g | 52.88 | f | 47.25 | j | 37.40 | 31.28 | l | 16.71 | q | 28.95 | f | ||||||
1988 | 8.81 | w | 19.07 | v | 21.14 | f | 33.64 | a | 43.06 | 56.34 | a | 59.16 | f | 56.00 | c | 45.86 | b | 42.08 | 22.17 | a | 13.11 | m | 42.74 | e | ||
1989 | 10.85 | r | 10.69 | t | 23.77 | r | 32.00 | s | 41.86 | j | 48.45 | 59.87 | 54.19 | 46.20 | 35.19 | 24.12 | b | 11.03 | b | 39.87 | e | |||||
1990 | 16.50 | b | 15.04 | a | 26.13 | a | 35.72 | 38.52 | 49.15 | 57.45 | 55.84 | 52.20 | 32.74 | 26.00 | a | 4.08 | a | 34.11 | ||||||||
1991 | 11.47 | a | 24.20 | 23.57 | c | 29.44 | e | 39.83 | d | 49.56 | l | ----- | z | 57.92 | l | 47.82 | b | 36.89 | c | 19.07 | p | 12.04 | d | 28.16 | d | |
1992 | 13.52 | a | 23.90 | 29.98 | 35.56 | c | 45.27 | a | 49.42 | 52.16 | 54.73 | 44.97 | 38.91 | b | 18.11 | c | 11.56 | 34.84 | ||||||||
1993 | 12.69 | 15.30 | 26.81 | 32.22 | 44.79 | 47.18 | 49.63 | 51.47 | 44.70 | 35.92 | a | 17.67 | a | 14.43 | b | 32.73 | ||||||||||
1994 | 19.05 | 13.13 | b | 24.83 | b | 33.02 | a | 45.66 | 50.88 | 55.94 | 57.95 | 49.84 | a | 36.54 | r | 14.43 | c | 17.45 | b | 34.74 | a | |||||
1995 | 12.89 | c | 22.92 | b | 23.36 | b | 30.53 | a | 39.06 | 47.75 | 55.02 | 55.33 | a | 48.79 | f | 32.37 | 25.45 | 14.83 | a | 32.68 | a | |||||
1996 | 14.11 | 15.03 | 22.03 | 31.28 | 37.37 | 51.67 | 58.25 | a | 56.06 | 44.76 | a | 34.98 | 24.22 | 17.77 | a | 33.96 | ||||||||||
1997 | ----- | z | 16.50 | 25.26 | 28.15 | 42.30 | a | 52.48 | a | 54.71 | 55.19 | 49.23 | 34.82 | 22.88 | a | 11.77 | 35.75 | a | ||||||||
1998 | 19.20 | a | 19.50 | 25.10 | 34.98 | 44.35 | a | 44.75 | 60.05 | 56.40 | a | 50.12 | d | 37.43 | a | 26.59 | b | 12.74 | 35.93 | |||||||
1999 | 17.85 | 19.98 | 24.89 | 30.53 | 38.94 | 48.14 | b | 54.53 | b | 55.15 | a | 42.85 | 37.17 | a | 30.20 | 13.35 | 34.47 | |||||||||
2000 | 16.73 | 23.45 | a | 25.52 | 35.22 | c | 42.43 | a | 49.57 | 57.48 | 55.89 | 44.97 | 36.37 | a | 13.37 | 13.48 | 34.54 | |||||||||
2001 | 12.21 | 16.34 | 27.40 | 32.67 | 43.05 | 50.62 | a | 57.77 | a | 56.58 | 48.77 | 34.97 | 26.95 | a | 13.29 | 35.05 | ||||||||||
2002 | 14.56 | 14.88 | 19.97 | 31.83 | 39.92 | 50.27 | 58.92 | 51.19 | 46.30 | 30.11 | 21.68 | 17.87 | 33.13 | |||||||||||||
2003 | 19.17 | a | 13.82 | 25.56 | 33.87 | 41.03 | a | 47.50 | 59.60 | 58.27 | a | 45.00 | 39.12 | c | 17.68 | 17.31 | 34.83 | |||||||||
2004 | 14.12 | a | 17.07 | 29.14 | c | 35.20 | g | 39.35 | e | 47.87 | 54.13 | a | 51.42 | 44.46 | d | 35.40 | e | 21.19 | a | 18.79 | 33.90 | a | ||||
2005 | 17.85 | 16.54 | 24.70 | c | 31.75 | d | 40.08 | 46.85 | 56.68 | 53.73 | a | 44.20 | 37.19 | 20.18 | 12.25 | a | 33.50 | |||||||||
2006 | 17.60 | a | 14.88 | 23.55 | 36.24 | c | 42.66 | b | 52.12 | 58.88 | a | 52.92 | e | 48.91 | n | 35.05 | a | 24.77 | b | 16.18 | c | 34.08 | a | |||
2007 | 10.26 | 22.54 | 31.60 | 34.94 | c | 45.43 | a | 52.50 | b | 63.53 | a | 57.39 | d | 45.48 | g | 36.81 | 25.34 | b | 15.37 | a | 35.97 | a | ||||
2008 | 11.52 | 18.71 | a | 20.97 | 27.65 | 39.73 | a | 47.95 | 56.37 | 55.44 | 46.17 | a | 34.30 | c | 25.50 | 11.73 | a | 33.00 | ||||||||
2009 | 15.23 | a | 18.77 | b | 20.31 | 29.62 | 41.42 | 45.12 | i | 55.24 | 53.65 | a | 50.81 | a | 29.22 | b | 24.86 | a | 7.90 | 31.55 | a | |||||
2010 | 16.06 | 16.84 | 26.63 | 31.97 | a | 35.65 | 47.65 | 55.39 | 53.97 | 48.08 | 39.82 | 23.20 | 18.16 | 34.45 | ||||||||||||
2011 | 15.35 | 13.04 | 25.39 | 28.42 | 36.24 | 46.33 | 56.27 | 55.92 | 49.20 | 38.83 | a | 21.65 | 12.71 | 33.28 | ||||||||||||
2012 | 17.97 | 16.84 | 29.11 | 36.47 | 40.16 | 51.47 | a | 58.97 | 56.13 | 48.90 | 34.58 | 27.35 | 17.27 | 36.27 | ||||||||||||
2013 | 12.44 | 17.02 | 23.31 | b | 28.67 | 41.63 | 51.13 | 59.67 | e | 56.75 | q | ----- | z | ----- | z | ----- | z | ----- | z | 33.41 | e | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 14.24 | 17.83 | 24.45 | 31.47 | 40.93 | 49.14 | 56.45 | 54.60 | 46.20 | 35.60 | 22.55 | 14.04 | 33.85 | |||||||||||||
S.D. | 3.28 | 3.38 | 3.40 | 3.50 | 2.66 | 2.60 | 2.53 | 2.32 | 2.92 | 2.76 | 3.52 | 3.36 | 1.16 | |||||||||||||
SKEW | -1.03 | -0.24 | -0.01 | -0.44 | 0.01 | 0.46 | 0.01 | -0.13 | 0.05 | -0.36 | -0.56 | -0.53 | -0.28 | |||||||||||||
MAX | 19.20 | 24.20 | 31.60 | 37.08 | 45.92 | 56.34 | 63.53 | 59.48 | 52.20 | 42.08 | 30.20 | 19.17 | 36.27 | |||||||||||||
MIN | 2.25 | 7.76 | 17.48 | 23.32 | 35.65 | 44.41 | 49.63 | 50.11 | 40.83 | 29.22 | 13.37 | 4.08 | 31.13 | |||||||||||||
YRS | 41 | 42 | 43 | 42 | 42 | 40 | 40 | 40 | 39 | 42 | 39 | 39 | 26 |