YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.95 | j | ----- | z |
1969 | 26.94 | 22.00 | 20.10 | 33.83 | 40.16 | 46.80 | 56.03 | 55.42 | 48.57 | 34.23 | 24.17 | 22.55 | 35.90 | |||||||||||||
1970 | 17.29 | 23.86 | 21.52 | 27.03 | 39.23 | 46.00 | 54.61 | 52.90 | 42.63 | 30.45 | 24.57 | 22.55 | 33.55 | |||||||||||||
1971 | 17.97 | 18.18 | 24.81 | 27.87 | 36.90 | 47.77 | 54.74 | 51.45 | 43.43 | 32.74 | 26.20 | 17.97 | 33.34 | |||||||||||||
1972 | 16.87 | 22.34 | 27.97 | 30.50 | 38.06 | 49.03 | 54.45 | 51.43 | a | 47.20 | 39.83 | a | 21.80 | 18.97 | 34.87 | |||||||||||
1973 | 17.06 | 22.00 | 25.06 | 26.77 | 38.94 | 46.13 | 53.42 | 52.00 | 43.00 | 34.13 | 29.10 | 20.84 | 34.04 | |||||||||||||
1974 | 20.32 | 18.79 | 28.52 | 29.23 | 39.42 | 47.57 | 53.26 | 50.74 | 43.77 | 38.74 | 24.93 | 17.52 | 34.40 | |||||||||||||
1975 | 18.48 | 17.64 | 25.16 | 27.86 | a | 34.13 | 44.47 | 51.77 | 51.23 | 44.10 | 33.71 | 21.83 | 20.35 | 32.56 | ||||||||||||
1976 | 15.94 | 23.15 | c | 22.32 | 30.97 | 39.03 | 46.10 | 51.87 | 49.03 | 44.23 | 32.90 | 22.03 | a | 14.70 | a | 32.69 | ||||||||||
1977 | 19.13 | 18.75 | 23.12 | g | 34.41 | c | 40.48 | 50.00 | 54.06 | 55.90 | 48.17 | 34.00 | 26.03 | 21.06 | 36.55 | a | ||||||||||
1978 | 14.62 | b | 15.67 | a | 24.67 | a | 28.97 | 37.35 | 50.37 | 54.90 | 50.65 | 45.60 | 37.84 | 29.37 | 13.50 | a | 33.62 | |||||||||
1979 | 12.39 | 19.41 | a | 25.77 | 29.20 | 37.35 | 45.27 | 51.65 | 50.00 | 46.23 | 36.06 | 19.63 | 19.45 | 32.70 | ||||||||||||
1980 | 23.10 | a | 25.31 | 24.52 | 28.45 | a | 38.29 | 48.77 | 55.77 | 54.13 | 48.50 | 32.06 | 23.90 | 26.23 | 35.75 | |||||||||||
1981 | 20.26 | 22.14 | 25.84 | 34.97 | 40.29 | 52.13 | 55.68 | 52.74 | 47.60 | 37.68 | 28.60 | 24.00 | 36.83 | |||||||||||||
1982 | 21.13 | 21.14 | 27.33 | a | 33.97 | 39.06 | 47.47 | 53.77 | 55.19 | 48.83 | 34.68 | 27.46 | b | 18.70 | a | 35.73 | ||||||||||
1983 | 22.26 | 23.21 | 27.57 | c | 28.29 | b | 34.58 | 45.90 | a | 53.61 | 53.68 | 49.50 | 39.77 | 28.90 | a | 17.68 | 35.41 | |||||||||
1984 | 17.65 | 20.38 | 23.84 | 29.13 | 44.19 | 49.83 | 53.81 | 53.87 | 46.86 | a | 33.97 | 28.37 | 25.16 | 35.59 | ||||||||||||
1985 | 19.00 | 20.96 | 28.84 | 34.17 | 42.03 | 50.90 | 53.16 | 53.23 | 45.63 | 39.13 | 29.90 | 21.45 | 36.53 | |||||||||||||
1986 | 25.10 | 25.79 | 29.45 | 35.20 | 41.71 | 50.40 | 53.39 | 53.45 | 45.87 | 36.77 | 26.77 | 20.52 | 37.03 | |||||||||||||
1987 | 19.10 | 21.86 | 23.68 | 30.63 | 40.19 | 48.80 | 52.58 | 52.84 | 45.47 | 38.16 | 27.77 | 19.61 | 35.06 | |||||||||||||
1988 | 17.65 | 25.38 | 23.58 | 31.87 | 39.97 | 50.17 | 54.00 | 54.58 | 44.93 | 37.52 | 28.50 | 18.23 | 35.53 | |||||||||||||
1989 | 19.74 | 21.04 | 28.77 | 35.27 | 43.97 | 49.97 | 54.32 | 53.71 | 45.77 | 35.97 | 27.83 | 17.52 | 36.16 | |||||||||||||
1990 | 20.00 | 20.79 | 28.10 | 36.40 | 50.32 | 57.30 | 59.67 | a | 57.29 | 50.93 | 40.74 | 34.47 | 26.68 | 40.22 | ||||||||||||
1991 | 26.42 | 22.57 | 26.90 | 32.03 | 40.45 | 48.60 | 54.81 | 54.10 | 46.33 | 35.94 | 25.83 | 22.32 | 36.36 | |||||||||||||
1992 | 17.52 | 25.38 | 27.71 | 36.07 | 42.39 | 48.07 | 53.48 | 51.94 | 46.90 | 38.61 | 21.60 | 20.71 | 35.86 | |||||||||||||
1993 | 25.03 | 26.68 | 27.84 | 34.57 | 40.03 | 49.27 | 56.52 | 54.58 | 45.43 | 34.77 | a | ----- | z | ----- | z | 39.47 | b | |||||||||
1994 | ----- | z | 22.14 | 28.03 | b | 33.03 | 42.42 | 50.63 | 54.35 | 53.61 | 45.34 | a | 34.16 | 26.80 | 25.00 | 37.78 | a | |||||||||
1995 | 22.19 | 29.36 | 27.45 | 28.10 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.76 | a | 21.31 | b | 26.01 | g | |||
1996 | 21.13 | a | 23.93 | 21.84 | 31.48 | a | 44.52 | b | 52.31 | d | 56.35 | 53.23 | a | 44.27 | 34.77 | a | 28.72 | a | 22.32 | c | 36.24 | |||||
1997 | 18.00 | b | 21.32 | c | 28.00 | d | 30.14 | b | 42.20 | f | 47.72 | e | 52.78 | m | 54.55 | k | 48.86 | i | 34.05 | k | 24.00 | s | 16.69 | r | 29.04 | g |
1998 | 20.77 | r | 23.19 | l | 26.07 | q | 30.16 | k | 40.08 | s | 46.11 | u | ----- | z | 52.12 | n | 48.91 | s | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.57 | w | 18.26 | d | 18.26 | k |
2000 | 21.32 | f | 21.36 | r | 24.86 | q | 30.27 | s | 36.75 | w | ----- | z | ----- | z | ----- | z | 45.55 | s | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | 33.62 | q | 39.79 | l | 49.15 | j | ----- | z | ----- | z | ----- | z | 36.50 | w | 31.60 | o | 22.57 | x | ----- | z |
2002 | 22.62 | r | 17.19 | l | 21.29 | n | 31.59 | m | 38.94 | m | 51.30 | t | 53.00 | x | 52.00 | m | 46.58 | k | 35.43 | j | 25.50 | d | 21.71 | j | 25.50 | k |
2003 | 23.76 | f | 21.57 | e | 25.48 | d | 31.62 | d | 41.60 | k | 47.44 | e | 53.69 | r | 52.35 | n | 45.15 | d | 40.32 | f | 27.64 | e | 22.04 | h | 33.15 | f |
2004 | 18.79 | l | 16.77 | g | 30.09 | i | 32.81 | c | 41.69 | e | 48.54 | d | 53.37 | a | 50.14 | i | 44.32 | b | 35.52 | d | 25.12 | f | 19.68 | c | 39.42 | e |
2005 | 26.14 | b | ----- | z | ----- | z | 33.22 | l | 43.32 | f | 49.18 | h | 54.48 | d | 54.67 | a | 46.88 | f | 35.92 | e | 28.76 | i | 19.83 | g | 42.80 | h |
2006 | 18.78 | d | 19.30 | h | 26.18 | i | 32.14 | i | ----- | z | 54.46 | f | 57.29 | g | 55.17 | b | 42.72 | a | 35.43 | c | 28.61 | g | 18.71 | 34.16 | g | |
2007 | 9.58 | e | 22.81 | b | 28.73 | e | 30.16 | e | 41.20 | f | 48.62 | n | ----- | z | 56.14 | b | 48.59 | c | 33.59 | d | 27.43 | b | 19.67 | d | 30.74 | c |
2008 | 14.78 | d | 22.56 | d | 23.57 | c | 29.25 | f | 36.57 | j | 51.19 | d | 54.77 | a | 53.69 | b | 44.96 | b | 33.42 | l | 28.22 | c | 20.41 | d | 34.91 | c |
2009 | 21.80 | a | 21.48 | a | 27.15 | d | 29.96 | c | 44.52 | f | ----- | z | ----- | z | ----- | z | 43.77 | d | 34.37 | d | ----- | z | ----- | z | 29.76 | f |
2010 | 18.79 | b | 19.15 | b | ----- | z | 34.24 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.97 | j |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | 43.08 | s | 51.07 | a | 58.43 | a | 57.37 | a | 45.43 | b | 34.37 | a | 25.44 | c | 14.90 | b | 41.00 | e |
2012 | 23.97 | b | 20.58 | c | 28.92 | f | 34.34 | a | 42.43 | c | ----- | z | ----- | z | ----- | z | ----- | z | 33.77 | ----- | z | ----- | z | 31.02 | g | |
2013 | 14.68 | ----- | z | ----- | z | ----- | z | 40.23 | 55.30 | 53.77 | ----- | z | ----- | z | 30.06 | 25.20 | 20.45 | 34.24 | e | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.47 | 21.98 | 25.94 | 31.55 | 40.33 | 49.13 | 54.40 | 53.44 | 45.88 | 35.50 | 26.49 | 20.26 | 35.25 | |||||||||||||
S.D. | 3.91 | 2.74 | 2.46 | 2.81 | 3.12 | 2.73 | 1.72 | 2.00 | 2.05 | 2.58 | 3.01 | 3.06 | 1.72 | |||||||||||||
SKEW | -0.08 | 0.27 | -0.59 | 0.05 | 0.77 | 0.88 | 1.07 | -0.10 | 0.48 | 0.11 | -0.11 | 0.07 | 0.58 | |||||||||||||
MAX | 26.94 | 29.36 | 29.45 | 36.40 | 50.32 | 57.30 | 59.67 | 57.37 | 50.93 | 40.74 | 34.47 | 26.68 | 40.22 | |||||||||||||
MIN | 9.58 | 15.67 | 20.10 | 26.77 | 34.13 | 44.47 | 51.65 | 49.03 | 42.63 | 30.06 | 19.63 | 13.50 | 32.56 | |||||||||||||
YRS | 36 | 35 | 32 | 33 | 30 | 33 | 32 | 32 | 34 | 35 | 33 | 34 | 24 |