YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.85 | a | 58.92 | 49.19 | 32.41 | b | 18.95 | 45.06 | g | |||
1969 | 15.22 | a | 18.20 | 25.40 | 44.78 | 54.73 | 55.72 | 66.37 | 67.82 | 55.93 | 42.98 | 30.37 | 19.98 | 41.46 | ||||||||||||
1970 | 7.70 | a | 15.05 | 25.34 | 42.58 | 54.10 | 64.97 | 68.87 | 65.69 | 57.48 | 47.69 | 30.88 | a | 18.63 | 41.58 | |||||||||||
1971 | 7.37 | 15.45 | 23.39 | 41.53 | a | 51.80 | a | 66.75 | b | 63.68 | a | 61.98 | 58.27 | 52.79 | 32.52 | 20.45 | 41.33 | |||||||||
1972 | 7.37 | 11.41 | 23.38 | a | 36.78 | 57.32 | 60.88 | 65.29 | 64.95 | 55.65 | 42.15 | 31.05 | 15.32 | 39.30 | ||||||||||||
1973 | 17.66 | 19.02 | 36.61 | 41.45 | 50.55 | 64.15 | 68.00 | 67.29 | 56.75 | 51.48 | 31.93 | 18.42 | 43.61 | |||||||||||||
1974 | 13.89 | 14.41 | 27.35 | 44.86 | a | 50.73 | 59.38 | 68.81 | 64.26 | 51.98 | 44.90 | a | 34.11 | b | 23.57 | a | 41.52 | |||||||||
1975 | 15.74 | 18.38 | 23.34 | 36.35 | 58.61 | 63.53 | 69.79 | 64.69 | 52.62 | 47.52 | b | 36.25 | 18.66 | 42.12 | ||||||||||||
1976 | 10.27 | 23.86 | 27.34 | 44.87 | 51.56 | 64.80 | 67.90 | 64.69 | 55.10 | 40.23 | 24.07 | 7.89 | 40.22 | |||||||||||||
1977 | 4.47 | 18.55 | 33.73 | 46.83 | 61.66 | 60.97 | 69.85 | 62.03 | 57.53 | 46.23 | 31.65 | 17.24 | 42.56 | |||||||||||||
1978 | 11.48 | c | 11.83 | a | 25.91 | b | 39.25 | b | 56.74 | 61.90 | 65.32 | 65.68 | 59.57 | 44.53 | a | 29.90 | a | 14.55 | 40.56 | |||||||
1979 | 5.25 | a | 8.69 | a | 28.34 | 37.87 | 50.05 | ----- | z | ----- | z | ----- | z | ----- | z | 43.40 | 30.28 | 25.53 | 28.68 | d | ||||||
1980 | 15.26 | b | 14.59 | 25.19 | 44.52 | a | 56.15 | 60.95 | 68.44 | 66.44 | 56.10 | a | 40.42 | 31.78 | 16.88 | g | 43.62 | a | ||||||||
1981 | 13.40 | a | 20.16 | 31.39 | 43.75 | b | 52.48 | c | 62.53 | 65.90 | 65.16 | b | 53.96 | b | 40.47 | 34.75 | 21.09 | c | 42.09 | |||||||
1982 | 3.19 | 13.71 | 26.90 | g | 36.20 | b | 57.77 | a | 57.48 | a | ----- | z | 61.05 | c | 54.18 | b | 46.38 | c | 31.98 | b | 24.41 | b | 38.64 | b | ||
1983 | 17.94 | d | 25.63 | a | 30.22 | b | 38.82 | 47.61 | d | 61.04 | c | 71.70 | a | 69.36 | c | 57.28 | 44.95 | a | ----- | z | 7.13 | d | 42.88 | a | ||
1984 | 10.18 | a | 26.63 | c | 21.95 | 44.43 | a | 49.21 | b | 63.22 | c | 65.26 | 67.43 | c | 53.64 | a | 47.52 | 30.31 | a | 19.39 | 41.60 | |||||
1985 | 13.02 | b | 15.05 | 32.30 | a | 44.00 | 56.91 | c | 58.31 | c | 64.60 | a | 62.95 | 56.40 | a | 44.85 | a | 25.22 | c | 8.69 | b | 40.19 | ||||
1986 | 12.84 | 15.75 | 28.85 | a | 46.57 | a | 56.45 | a | 61.34 | b | 67.50 | b | 60.03 | b | 54.97 | 42.90 | 25.81 | a | 20.63 | 41.14 | ||||||
1987 | 19.52 | b | 24.70 | 32.85 | 46.63 | 55.10 | b | 65.85 | 69.18 | 63.60 | 56.18 | 39.82 | a | 35.09 | a | 24.71 | b | 44.44 | ||||||||
1988 | 9.18 | a | 12.17 | 28.36 | c | 41.97 | 57.16 | 66.28 | 69.28 | b | 68.02 | a | 56.10 | 39.88 | a | 32.26 | a | 16.80 | a | 41.45 | ||||||
1989 | 18.34 | 9.81 | a | 22.40 | 38.48 | a | 51.62 | b | 60.42 | 68.69 | b | 65.72 | b | 56.12 | a | 46.85 | a | 27.00 | 7.61 | 39.42 | ||||||
1990 | 22.05 | 17.88 | 30.82 | a | 44.72 | 50.82 | 62.75 | 66.26 | 64.52 | a | 57.98 | a | 43.38 | b | 35.40 | 16.56 | 42.76 | |||||||||
1991 | 8.87 | 20.43 | 28.95 | a | 46.10 | 57.94 | f | 67.05 | a | 67.15 | 67.47 | 54.10 | 44.06 | 26.02 | a | 19.82 | a | 40.91 | a | |||||||
1992 | 18.69 | 21.69 | 28.50 | a | 38.60 | 54.80 | a | 59.57 | 61.28 | b | 61.95 | 53.68 | 43.37 | a | 28.63 | 19.81 | 40.88 | |||||||||
1993 | 13.16 | 14.43 | a | 28.39 | 38.28 | 52.83 | a | 60.60 | 67.02 | b | 66.31 | 51.50 | 42.22 | b | 28.97 | 20.09 | c | 40.32 | ||||||||
1994 | 3.60 | 9.80 | 30.62 | a | 41.64 | b | 54.62 | a | 65.00 | a | 66.25 | a | 62.81 | 60.24 | a | 46.97 | a | 35.10 | 24.94 | 41.80 | ||||||
1995 | 16.95 | 16.63 | a | 30.68 | 36.13 | 53.26 | b | 68.10 | 68.08 | 69.66 | b | 53.93 | a | 46.62 | a | 22.83 | 15.43 | b | 41.52 | |||||||
1996 | 10.68 | a | 13.79 | a | 21.03 | 36.75 | 50.07 | a | 62.87 | 63.90 | a | 66.07 | a | 57.53 | a | 44.42 | 26.43 | a | 17.82 | 39.28 | ||||||
1997 | 11.47 | 18.79 | 26.11 | 39.17 | 46.74 | f | 65.76 | a | 66.16 | 61.55 | a | 57.93 | a | 44.76 | 29.20 | 25.65 | a | 40.59 | a | |||||||
1998 | 18.87 | 29.88 | b | 29.53 | 45.98 | 60.64 | c | 62.34 | a | 68.15 | 68.82 | 61.78 | 47.12 | b | 36.00 | b | 23.68 | 46.07 | ||||||||
1999 | 11.31 | 21.93 | 30.10 | 45.05 | 57.32 | 64.58 | 71.27 | 64.89 | 56.81 | a | 42.97 | 38.63 | c | 19.39 | 43.69 | |||||||||||
2000 | 12.21 | 22.28 | b | 36.52 | 42.02 | b | 56.27 | 61.72 | 65.00 | a | 65.79 | 56.17 | 48.30 | d | 33.22 | a | 8.38 | e | 42.32 | |||||||
2001 | 18.75 | g | 14.27 | d | 28.52 | d | 43.84 | a | 55.82 | c | 62.68 | 67.42 | 67.85 | 56.67 | a | 44.86 | b | 40.14 | e | 26.98 | j | 48.21 | b | |||
2002 | 22.22 | h | 24.30 | h | 22.52 | i | 40.57 | c | 48.74 | b | 63.71 | a | 70.44 | 65.38 | a | 59.10 | d | 39.66 | 28.78 | c | 22.57 | b | 48.77 | c | ||
2003 | 12.06 | 9.77 | 25.52 | 38.68 | 51.46 | f | 60.64 | a | 66.26 | 67.47 | 57.53 | a | 44.40 | 31.20 | h | 24.84 | i | 42.48 | c | |||||||
2004 | 7.64 | m | 20.96 | p | 30.93 | j | 41.79 | f | 50.87 | 59.98 | g | 64.11 | d | 60.07 | a | 59.93 | b | 45.42 | a | 34.73 | 17.24 | b | 47.48 | e | ||
2005 | 11.33 | a | 22.30 | 23.33 | a | 44.36 | a | 50.97 | 67.74 | a | 68.81 | 66.62 | a | 61.50 | a | 49.00 | e | 33.28 | a | 18.90 | 43.18 | |||||
2006 | 24.56 | 16.14 | 29.45 | 46.05 | 55.17 | a | 62.83 | 69.48 | 65.27 | c | 54.46 | b | 41.27 | a | 35.36 | a | 25.98 | c | 43.84 | |||||||
2007 | 19.25 | a | 11.60 | b | 31.43 | b | 40.18 | e | 56.52 | 64.73 | 66.94 | 67.03 | b | 59.58 | 50.90 | a | 31.38 | 16.71 | 43.02 | |||||||
2008 | 15.08 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.08 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.96 | 17.15 | 28.14 | 41.86 | 54.08 | 62.79 | 67.25 | 65.24 | 56.54 | 44.92 | 31.41 | 18.45 | 41.84 | |||||||||||||
S.D. | 5.14 | 5.20 | 3.86 | 3.43 | 3.42 | 2.86 | 2.27 | 2.47 | 2.48 | 3.27 | 3.94 | 5.20 | 1.59 | |||||||||||||
SKEW | 0.05 | 0.44 | 0.18 | -0.22 | 0.11 | -0.21 | -0.30 | -0.40 | 0.08 | 0.33 | -0.13 | -0.74 | 0.51 | |||||||||||||
MAX | 24.56 | 29.88 | 36.61 | 46.83 | 61.66 | 68.10 | 71.70 | 69.66 | 61.78 | 52.79 | 40.14 | 25.98 | 46.07 | |||||||||||||
MIN | 3.19 | 8.69 | 21.03 | 36.13 | 47.61 | 55.72 | 61.28 | 60.03 | 51.50 | 39.66 | 22.83 | 7.13 | 39.28 | |||||||||||||
YRS | 37 | 37 | 36 | 38 | 36 | 37 | 37 | 39 | 39 | 40 | 38 | 37 | 29 |