YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | 21.73 | 23.57 | a | 29.55 | 37.85 | 46.29 | 51.83 | x | 54.98 | 55.23 | 47.63 | 36.35 | 22.70 | 14.70 | a | 35.51 | a | |||||||||
1979 | 18.22 | a | 10.88 | 29.94 | 37.23 | 46.60 | 51.79 | f | 57.56 | 55.94 | g | 49.72 | 38.71 | 28.95 | a | 6.80 | a | 32.46 | b | |||||||
1980 | 11.45 | 27.72 | 27.13 | a | 39.24 | a | 44.94 | 52.64 | i | 56.89 | 52.70 | f | 45.52 | 36.00 | 27.47 | 5.66 | 32.20 | b | ||||||||
1981 | 31.50 | 23.84 | 34.48 | 35.12 | 50.00 | 52.71 | f | 55.52 | 53.85 | 43.14 | l | 35.63 | 21.27 | ----- | z | 37.91 | c | |||||||||
1982 | 4.44 | 16.43 | a | 26.61 | 33.57 | 43.03 | 52.14 | h | 54.05 | b | 53.05 | k | 46.55 | 26.10 | ----- | z | 20.98 | b | 30.19 | c | ||||||
1983 | 16.76 | 21.80 | 31.87 | 38.02 | a | 46.26 | 53.64 | e | 56.66 | 53.71 | g | 42.67 | 34.25 | a | 26.10 | a | 20.16 | 35.29 | a | |||||||
1984 | 15.90 | a | 17.46 | a | 35.97 | 37.14 | e | 44.52 | b | 53.11 | c | 56.18 | 54.48 | 47.12 | 34.55 | 18.45 | a | 17.34 | 36.02 | |||||||
1985 | 29.16 | 13.20 | 25.39 | 28.11 | g | 43.56 | 51.32 | e | 57.77 | 52.74 | 45.52 | 29.53 | a | 10.88 | 26.82 | 35.08 | a | |||||||||
1986 | 24.28 | a | 23.79 | 24.73 | 28.75 | d | 44.43 | c | 52.54 | b | 56.61 | 52.95 | a | 46.93 | 38.13 | l | 22.30 | b | 26.06 | 36.67 | a | |||||
1987 | 20.87 | a | 25.55 | 27.66 | 37.70 | e | 44.98 | 51.65 | d | 57.50 | 56.10 | a | 45.52 | h | 36.32 | 25.20 | 15.43 | c | 36.27 | a | ||||||
1988 | 16.18 | a | 21.91 | b | 31.92 | f | 37.17 | 47.05 | 53.31 | f | 56.81 | 54.45 | i | 44.65 | 33.13 | 20.48 | 17.83 | a | 32.80 | c | ||||||
1989 | 0.73 | c | 16.84 | 24.16 | 38.81 | a | 46.27 | 52.92 | d | 57.63 | 56.89 | 48.14 | i | 32.60 | 14.80 | 22.74 | b | 33.13 | a | |||||||
1990 | 11.08 | 0.79 | 29.53 | b | 40.02 | d | 48.74 | ----- | z | 57.21 | 57.15 | d | 48.48 | h | 32.07 | a | 8.98 | a | 11.77 | 29.73 | b | |||||
1991 | 11.90 | 20.32 | 24.63 | 37.96 | c | 45.48 | 54.66 | a | 55.89 | 53.77 | a | 48.03 | 31.94 | 23.65 | c | 16.32 | 35.38 | |||||||||
1992 | 19.48 | 14.07 | 24.48 | 34.13 | 43.50 | 52.80 | 57.26 | 53.55 | 38.65 | 32.02 | a | 25.00 | a | 11.06 | 33.83 | |||||||||||
1993 | 11.95 | 22.96 | 28.21 | e | 40.55 | h | 49.52 | b | 54.27 | 59.24 | 56.55 | 46.72 | 37.45 | a | 20.48 | 20.90 | 37.11 | a | ||||||||
1994 | 19.69 | 16.73 | 25.10 | a | 38.93 | 46.23 | 54.17 | 56.27 | 56.74 | 46.41 | a | 32.07 | a | 13.29 | a | 16.10 | 35.14 | |||||||||
1995 | 12.95 | c | 19.73 | 18.71 | 40.12 | 47.47 | 54.33 | 57.40 | 55.03 | 51.68 | 36.52 | 22.84 | a | 17.53 | a | 36.19 | ||||||||||
1996 | 8.35 | 13.50 | a | 29.53 | 36.68 | 47.57 | a | 53.42 | 56.53 | b | 53.67 | a | 43.64 | a | 25.52 | 18.48 | b | 15.27 | 33.51 | |||||||
1997 | 11.71 | 28.89 | 25.79 | 38.50 | a | 46.94 | 55.41 | a | 59.98 | 56.34 | 48.82 | 28.92 | 25.08 | 17.04 | c | 36.95 | ||||||||||
1998 | 17.73 | e | 27.67 | a | 31.44 | 41.40 | a | 46.33 | b | 55.46 | b | 57.24 | 52.19 | e | 45.86 | a | 36.32 | a | 20.54 | d | 13.43 | c | 37.13 | |||
1999 | 10.04 | g | 8.54 | a | 26.90 | a | 35.98 | a | 45.89 | c | 54.97 | 57.05 | 55.10 | 46.80 | 33.81 | b | 19.18 | 12.96 | e | 36.11 | a | |||||
2000 | 12.90 | 26.21 | 30.15 | 38.67 | a | 45.10 | a | 54.69 | a | 56.75 | a | 52.75 | c | 45.19 | a | 34.18 | 25.90 | 22.50 | b | 37.08 | ||||||
2001 | 25.85 | a | 23.10 | b | 28.89 | 37.43 | 44.66 | b | 56.62 | 56.24 | b | 56.81 | 47.21 | a | 29.55 | 22.29 | a | 11.31 | e | 36.66 | ||||||
2002 | 20.62 | a | 19.46 | a | 23.55 | 31.68 | 48.84 | 53.60 | a | 59.02 | 54.08 | a | 47.78 | 40.45 | 34.53 | 20.04 | d | 37.80 | ||||||||
2003 | 21.58 | 29.04 | 26.15 | a | 38.55 | 47.12 | a | 53.24 | a | 59.53 | 54.97 | 46.92 | 41.03 | 18.00 | a | 16.40 | a | 37.71 | ||||||||
2004 | 9.52 | 26.75 | a | 25.23 | a | 39.14 | b | 51.10 | a | 57.18 | 60.95 | 59.52 | 42.98 | 36.19 | 24.00 | a | 20.12 | c | 37.72 | |||||||
2005 | 17.56 | 20.93 | a | 32.24 | 40.62 | 49.90 | 55.97 | 58.98 | 56.69 | 48.12 | 35.03 | 17.25 | d | 24.76 | 38.17 | |||||||||||
2006 | 11.00 | b | 20.44 | a | 24.83 | a | 36.95 | a | 48.60 | 52.50 | 56.34 | 52.52 | 48.40 | 36.53 | 14.88 | a | 18.50 | c | 35.12 | |||||||
2007 | 13.44 | 17.95 | 14.78 | a | 39.33 | 47.24 | 54.23 | 56.63 | 56.35 | 47.85 | 34.67 | a | 28.17 | 16.82 | a | 35.62 | ||||||||||
2008 | 10.50 | a | 18.26 | 30.07 | a | 34.77 | 45.56 | 51.95 | 54.32 | 53.40 | a | 46.67 | 29.73 | a | 20.68 | 12.50 | b | 34.03 | ||||||||
2009 | 13.15 | 15.44 | a | 26.02 | h | 36.37 | 48.27 | a | 52.55 | 58.90 | 53.53 | 47.82 | 39.85 | 18.68 | 16.17 | a | 36.43 | a | ||||||||
2010 | 20.48 | 26.15 | a | 27.52 | 38.55 | a | 47.85 | 53.47 | a | 55.61 | 56.02 | 48.36 | b | 36.60 | 25.17 | a | 14.40 | a | 37.51 | |||||||
2011 | 17.95 | 16.50 | 26.15 | 38.03 | 46.87 | 53.65 | 57.02 | 53.13 | 46.25 | 35.68 | ----- | z | ----- | z | 39.12 | b | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 16.08 | 19.89 | 27.23 | 37.33 | 46.67 | 53.86 | 57.13 | 54.90 | 46.55 | 34.22 | 21.43 | 16.89 | 36.20 | |||||||||||||
S.D. | 6.62 | 6.25 | 4.14 | 2.61 | 1.96 | 1.45 | 1.53 | 1.80 | 2.40 | 3.74 | 5.40 | 4.96 | 1.46 | |||||||||||||
SKEW | 0.15 | -0.82 | -0.58 | -1.38 | 0.24 | 0.42 | 0.40 | 0.44 | -1.08 | -0.45 | -0.16 | -0.08 | -0.45 | |||||||||||||
MAX | 31.50 | 29.04 | 35.97 | 41.40 | 51.10 | 57.18 | 60.95 | 59.52 | 51.68 | 41.03 | 34.53 | 26.82 | 38.17 | |||||||||||||
MIN | 0.73 | 0.79 | 14.78 | 28.75 | 43.03 | 51.32 | 54.05 | 52.19 | 38.65 | 25.52 | 8.98 | 5.66 | 33.51 | |||||||||||||
YRS | 33 | 34 | 32 | 32 | 34 | 27 | 34 | 29 | 30 | 33 | 32 | 32 | 18 |