YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.26 | 36.47 | 35.19 | 16.27 | 9.17 | a | 28.07 | g | ||||
1965 | 14.10 | 10.86 | 11.61 | 20.18 | b | 25.94 | 33.77 | 44.77 | 44.26 | 32.67 | 36.13 | 22.00 | 15.97 | a | 26.02 | |||||||||||
1966 | 8.50 | a | 5.61 | 18.55 | 23.80 | 35.87 | a | 40.04 | b | 47.73 | i | 46.23 | 40.62 | a | 28.90 | 21.57 | 14.26 | 25.81 | a | |||||||
1967 | 12.03 | a | 11.18 | 16.97 | b | 11.54 | b | 26.55 | 34.40 | 47.50 | a | 46.23 | 38.57 | 33.03 | 24.57 | 6.63 | a | 25.77 | ||||||||
1968 | 16.00 | 17.72 | 16.83 | a | 17.47 | 29.13 | 42.47 | 45.77 | 40.90 | 38.10 | a | 31.10 | 17.50 | 9.58 | 26.88 | |||||||||||
1969 | 15.16 | 10.41 | a | 10.71 | 21.83 | 34.81 | 36.13 | 47.61 | 48.74 | 41.13 | 21.74 | 19.97 | 15.52 | 26.98 | ||||||||||||
1970 | 11.06 | 14.96 | 11.00 | 13.03 | a | 27.19 | 36.74 | c | 45.58 | 46.61 | 34.10 | 24.77 | a | 20.93 | a | 11.80 | a | 24.82 | ||||||||
1971 | 12.48 | 10.00 | a | 13.76 | b | 22.00 | b | 24.56 | d | 42.03 | a | 50.40 | a | 44.97 | a | 35.90 | a | 22.42 | 17.80 | 6.52 | b | 25.24 | ||||
1972 | 12.06 | 16.17 | 22.33 | a | 23.34 | a | 32.70 | a | 40.74 | c | 50.10 | a | 44.17 | a | ----- | z | 25.80 | a | 12.55 | a | 8.20 | a | 26.20 | a | ||
1973 | 9.00 | 10.89 | a | 10.23 | a | 17.03 | 30.45 | 40.03 | 47.10 | 46.00 | 36.80 | 30.73 | a | 17.10 | 13.55 | 25.74 | ||||||||||
1974 | 8.52 | b | 10.44 | a | 18.07 | b | 16.93 | a | 32.52 | 46.14 | a | 45.94 | 45.65 | 40.27 | 32.10 | a | 17.79 | a | 8.27 | a | 26.89 | |||||
1975 | 11.66 | b | 10.13 | e | 12.54 | e | 13.32 | e | 25.79 | b | 37.64 | b | 46.29 | c | 46.48 | b | 40.96 | d | 27.00 | b | 18.15 | d | 17.70 | d | 25.64 | |
1976 | 13.48 | d | 16.68 | a | 9.88 | g | 20.65 | g | 33.43 | a | 41.57 | 48.06 | 43.67 | g | 38.12 | e | 26.50 | a | 24.24 | e | 18.14 | b | 28.91 | c | ||
1977 | 11.59 | b | 16.15 | a | 8.40 | f | 28.00 | c | 26.54 | e | 45.56 | c | 47.83 | b | 45.81 | d | 39.62 | d | 32.71 | g | 21.07 | 13.62 | g | 31.35 | c | |
1978 | 12.52 | d | 10.44 | c | 19.62 | e | 18.04 | b | 26.33 | d | 41.09 | g | 48.68 | c | 45.19 | d | 36.25 | b | 34.57 | a | 17.50 | d | 7.71 | 25.17 | a | |
1979 | 3.21 | c | 8.44 | c | 14.07 | c | 19.78 | g | 28.62 | b | 39.69 | d | 47.31 | b | 42.55 | b | 42.96 | g | 31.96 | f | 13.35 | d | 17.89 | c | 23.90 | c |
1980 | 14.84 | f | 16.59 | b | 8.64 | c | 18.16 | e | 23.16 | f | 38.88 | e | 47.37 | d | 44.38 | b | 38.48 | c | 28.26 | d | 21.26 | c | 22.14 | c | 28.42 | b |
1981 | 16.52 | h | 13.48 | e | 11.07 | c | 23.70 | g | 25.56 | d | 42.69 | d | 47.70 | d | 45.52 | d | 39.32 | e | 24.17 | h | 20.77 | d | 16.32 | f | 30.76 | d |
1982 | 8.69 | e | 11.74 | e | 12.50 | g | 16.50 | j | 26.73 | i | 36.29 | f | 43.96 | e | 45.26 | d | 35.64 | e | 23.37 | d | 16.69 | d | 11.42 | e | 24.60 | d |
1983 | 14.11 | l | 11.90 | h | 14.58 | l | 11.87 | o | 24.06 | o | 34.62 | n | 40.88 | o | 43.39 | h | 42.65 | j | 28.42 | g | 17.00 | q | 12.16 | f | ----- | z |
1984 | 14.30 | a | 12.52 | 14.23 | 17.73 | 36.30 | a | 39.17 | a | 46.50 | a | 45.67 | a | 40.90 | a | 20.33 | a | ----- | z | 12.06 | 27.25 | a | ||||
1985 | 11.66 | b | 9.74 | a | 13.10 | 26.38 | a | 31.71 | 44.30 | 49.21 | b | 47.11 | d | 34.08 | e | 29.17 | b | 15.57 | 18.23 | a | 27.52 | |||||
1986 | 21.52 | 15.26 | a | 22.57 | a | 21.43 | 31.48 | 44.07 | 44.65 | 47.45 | 32.80 | 25.68 | 18.62 | a | 15.87 | 28.45 | ||||||||||
1987 | 10.81 | 11.68 | 13.16 | 26.83 | 31.00 | a | 43.55 | a | 44.42 | 44.87 | 40.57 | 34.17 | a | 18.10 | a | 8.63 | a | 27.32 | ||||||||
1988 | 11.26 | 16.97 | 13.35 | 24.67 | 29.23 | 42.34 | a | 49.29 | 45.77 | 37.87 | 36.63 | a | 17.23 | 12.50 | a | 28.09 | ||||||||||
1989 | 10.57 | a | 11.79 | 20.17 | a | 28.36 | b | 31.90 | 40.07 | 48.94 | 44.00 | 39.57 | 29.17 | b | 23.00 | a | 17.58 | 28.76 | ||||||||
1990 | 13.16 | 10.63 | a | 18.84 | 25.59 | a | 29.03 | a | 43.50 | 48.23 | 44.39 | 42.00 | 31.19 | 20.20 | 8.23 | 27.92 | ||||||||||
1991 | 13.45 | 20.36 | 11.39 | 17.37 | 25.84 | 37.67 | 48.03 | 45.58 | 40.37 | 31.35 | 18.70 | 16.37 | a | 27.21 | ||||||||||||
1992 | 15.23 | 16.21 | 17.77 | a | 28.30 | 32.61 | 38.52 | a | 43.71 | 46.19 | 41.90 | 33.61 | 13.90 | 11.53 | a | 28.29 | ||||||||||
1993 | 13.58 | 12.75 | 21.35 | 22.73 | 32.52 | 38.13 | 44.97 | 45.06 | 40.67 | 30.23 | a | 17.70 | 14.53 | a | 27.85 | |||||||||||
1994 | 16.55 | 11.96 | 22.13 | 24.93 | b | 32.16 | 46.90 | 51.10 | 49.23 | 41.70 | 28.06 | 12.93 | 16.77 | 29.54 | ||||||||||||
1995 | 14.71 | ----- | z | 18.29 | 22.21 | b | 27.30 | a | 36.47 | 49.16 | ----- | z | 43.63 | 34.03 | 29.00 | 19.00 | b | 29.38 | b | |||||||
1996 | 16.00 | a | 21.89 | a | 20.67 | a | 25.40 | ----- | z | 47.83 | 52.32 | 52.42 | 39.77 | 30.19 | 23.07 | 16.58 | 31.47 | a | ||||||||
1997 | 16.63 | a | 15.19 | b | 26.10 | 22.33 | 39.52 | 44.23 | 50.70 | a | 50.87 | 45.33 | 32.97 | b | 26.63 | ----- | z | 33.68 | a | |||||||
1998 | 19.84 | 15.89 | 22.13 | 23.30 | 32.87 | 41.93 | 53.32 | 53.28 | f | 44.76 | a | 32.55 | b | 25.79 | b | 14.50 | c | 29.72 | a | |||||||
1999 | 16.10 | a | 15.77 | b | 24.61 | c | 15.23 | 32.70 | a | 43.52 | e | 47.93 | d | 48.32 | 45.34 | a | 35.45 | 31.03 | a | 15.74 | d | 30.98 | ||||
2000 | 19.74 | 25.39 | a | 27.58 | 36.11 | b | 38.03 | 42.83 | 46.61 | 48.90 | a | 39.10 | a | 32.74 | 21.90 | 16.50 | a | 32.95 | ||||||||
2001 | 13.55 | 19.11 | 29.40 | k | 12.28 | a | 27.93 | b | 37.96 | b | 45.55 | i | 49.70 | a | 44.77 | 34.34 | b | 22.07 | 12.62 | g | 29.08 | c | ||||
2002 | 12.64 | c | 17.04 | a | 13.97 | 26.97 | 32.76 | b | 45.45 | a | 51.10 | 47.60 | a | 40.53 | 28.81 | 20.25 | b | 13.50 | a | 29.22 | ||||||
2003 | 20.42 | 11.93 | 18.84 | ----- | z | ----- | z | ----- | z | 52.45 | 46.83 | a | 41.13 | 34.87 | 14.76 | a | 12.77 | 28.22 | c | |||||||
2004 | 13.68 | 10.07 | b | ----- | z | 21.83 | 33.06 | 42.76 | a | 48.19 | 44.39 | 37.77 | ----- | z | 15.20 | 16.68 | c | 28.36 | b | |||||||
2005 | 17.53 | a | 14.79 | 15.29 | 22.17 | a | 32.57 | a | 36.77 | 53.29 | g | 45.45 | 39.03 | 30.23 | 22.83 | 13.48 | 26.38 | a | ||||||||
2006 | 11.94 | 13.33 | d | 11.25 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 12.63 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.46 | 13.80 | 16.90 | 21.62 | 30.74 | 40.99 | 47.91 | 46.11 | 39.40 | 30.20 | 19.74 | 13.66 | 27.64 | |||||||||||||
S.D. | 3.63 | 3.92 | 4.90 | 5.36 | 3.73 | 3.53 | 2.43 | 2.24 | 3.20 | 4.24 | 4.23 | 3.94 | 1.92 | |||||||||||||
SKEW | -0.03 | 0.67 | 0.29 | 0.14 | 0.25 | -0.10 | 0.29 | 0.59 | -0.16 | -0.58 | 0.53 | -0.19 | 0.94 | |||||||||||||
MAX | 21.52 | 25.39 | 27.58 | 36.11 | 39.52 | 47.83 | 53.32 | 52.42 | 45.34 | 36.63 | 31.03 | 22.14 | 32.95 | |||||||||||||
MIN | 3.21 | 5.61 | 8.64 | 11.54 | 24.56 | 33.77 | 43.71 | 40.90 | 32.67 | 20.33 | 12.55 | 6.52 | 24.82 | |||||||||||||
YRS | 39 | 40 | 35 | 35 | 36 | 37 | 37 | 38 | 39 | 37 | 40 | 37 | 22 |