YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.43 | a | 47.43 | 38.23 | 24.86 | a | 10.48 | 34.69 | g | |||
1969 | 6.67 | a | 4.68 | 11.61 | 31.27 | 38.32 | 43.03 | 52.06 | 52.06 | 42.33 | 33.03 | 20.83 | 10.84 | 28.90 | ||||||||||||
1970 | -4.40 | a | 1.04 | 12.58 | 29.40 | 40.45 | 50.27 | 53.77 | 50.32 | 45.50 | 36.32 | 23.14 | a | 9.55 | 29.00 | |||||||||||
1971 | -3.29 | 3.61 | 11.16 | 26.13 | 35.93 | a | 52.10 | a | 50.27 | a | 47.94 | 46.93 | 43.42 | 24.83 | 11.42 | 29.20 | ||||||||||
1972 | -6.10 | -1.55 | 11.27 | a | 24.00 | 40.58 | 45.63 | 52.32 | 52.06 | 43.47 | 30.77 | 24.37 | 6.94 | 26.98 | ||||||||||||
1973 | 6.61 | 8.43 | 26.29 | 30.70 | 38.84 | 51.30 | 54.03 | 54.90 | 44.03 | 39.26 | 24.67 | 10.39 | 32.45 | |||||||||||||
1974 | 3.84 | 0.71 | 17.00 | 30.90 | 36.94 | 44.93 | 54.61 | 51.32 | 38.87 | 32.77 | a | 25.43 | b | 14.74 | 29.34 | |||||||||||
1975 | 4.97 | 7.68 | 10.35 | 22.90 | 43.68 | 50.80 | 56.03 | 50.39 | 39.70 | 33.41 | b | 26.20 | 9.58 | 29.64 | ||||||||||||
1976 | -0.68 | 12.76 | 16.74 | 30.17 | 35.29 | 47.67 | 50.48 | 47.77 | 37.93 | 26.68 | 13.67 | -4.00 | 26.21 | |||||||||||||
1977 | -6.84 | 6.75 | 22.52 | 31.60 | 44.68 | 46.00 | 55.35 | 48.52 | 47.50 | 33.71 | 23.33 | 9.06 | 30.18 | |||||||||||||
1978 | 0.69 | b | -1.74 | a | 11.59 | b | 26.90 | a | 40.23 | 46.20 | 52.97 | 51.87 | 47.80 | 33.37 | a | 19.47 | 4.26 | 27.80 | ||||||||
1979 | -4.19 | -4.63 | a | 18.71 | 25.40 | 36.35 | 46.40 | 50.67 | a | 48.74 | 42.17 | 34.39 | 22.70 | 17.10 | 27.82 | |||||||||||
1980 | 5.66 | b | 2.59 | 12.58 | 31.03 | a | 39.03 | 45.53 | 54.35 | 55.71 | 44.52 | a | 30.06 | 23.07 | 7.71 | g | 31.29 | a | ||||||||
1981 | 0.26 | 9.86 | 20.13 | 31.93 | a | 36.07 | b | 50.17 | 52.77 | 52.52 | b | 41.38 | a | 30.06 | 24.90 | 11.23 | a | 30.11 | ||||||||
1982 | -9.58 | 0.04 | 16.38 | g | 23.97 | a | 44.70 | a | 42.55 | a | ----- | z | 46.54 | c | 41.68 | b | 35.50 | c | 23.07 | a | 16.17 | b | 26.46 | b | ||
1983 | 8.29 | c | 16.11 | 22.00 | b | 28.07 | 33.89 | d | 46.00 | c | 57.74 | 55.28 | b | 44.13 | 33.63 | a | ----- | z | -2.41 | d | 31.16 | a | ||||
1984 | -1.00 | a | 16.73 | c | 10.13 | 31.76 | a | 35.72 | b | 49.96 | c | 51.52 | 54.62 | b | 41.34 | a | 38.35 | 20.28 | a | 10.35 | 29.98 | |||||
1985 | 1.73 | a | 4.00 | 20.77 | a | 31.57 | 42.57 | c | 44.33 | c | 50.17 | a | 51.29 | 45.86 | a | 33.50 | a | 16.64 | b | -1.93 | b | 28.38 | ||||
1986 | 0.45 | 3.96 | 17.20 | a | 33.97 | a | 41.63 | a | 46.36 | b | 54.17 | b | 45.66 | b | 43.33 | 30.16 | 15.34 | a | 11.00 | 28.60 | ||||||
1987 | 9.61 | 12.64 | 19.68 | 31.50 | 40.38 | b | 51.63 | 55.35 | 50.03 | 42.13 | 29.45 | 27.10 | a | 17.48 | b | 32.25 | ||||||||||
1988 | -2.77 | a | -0.66 | 17.18 | c | 27.70 | 39.42 | 49.27 | 54.93 | b | 55.60 | a | 43.30 | 28.53 | a | 25.45 | a | 5.58 | 28.63 | |||||||
1989 | 6.74 | -3.75 | 9.00 | 24.97 | a | 36.76 | b | 47.67 | 53.41 | b | 52.14 | b | 41.59 | a | 33.97 | 18.33 | -2.81 | 26.50 | ||||||||
1990 | 10.29 | 4.86 | 18.07 | a | 30.90 | 37.71 | 50.83 | 53.87 | 53.27 | a | 46.47 | 31.41 | b | 25.27 | 5.90 | 30.74 | ||||||||||
1991 | -2.26 | 8.43 | 17.83 | a | 33.43 | 46.44 | f | 54.21 | a | 56.42 | 55.32 | 43.60 | 32.94 | 17.55 | a | 10.33 | a | 29.80 | a | |||||||
1992 | 11.32 | 12.62 | 17.93 | a | 29.13 | 39.27 | a | 46.13 | 49.79 | b | 49.19 | 43.10 | 32.53 | a | 21.77 | 12.10 | 30.41 | |||||||||
1993 | 2.03 | 2.37 | a | 16.16 | 27.17 | 40.83 | a | 48.53 | 56.17 | b | 54.68 | 40.63 | 31.45 | b | 21.43 | 14.13 | a | 29.63 | ||||||||
1994 | -6.48 | -1.79 | 20.17 | a | 27.97 | 39.17 | a | 51.07 | a | 54.73 | a | 51.68 | 49.31 | a | 36.70 | a | 26.63 | 16.39 | 30.46 | |||||||
1995 | 9.35 | 6.81 | a | 19.48 | 25.87 | 39.62 | b | 54.40 | 56.00 | 60.55 | b | 41.41 | a | 37.57 | a | 14.63 | 6.30 | a | 31.00 | |||||||
1996 | -1.73 | a | 1.82 | a | 9.74 | 25.53 | 37.52 | 51.90 | 52.43 | a | 54.10 | a | 47.62 | a | 33.42 | 18.72 | a | 10.42 | 28.46 | |||||||
1997 | 2.16 | 7.64 | 15.42 | 25.53 | 34.40 | f | 52.28 | a | 54.52 | 50.17 | a | 46.66 | a | 33.32 | 20.77 | 18.23 | a | 29.70 | a | |||||||
1998 | 11.71 | 21.22 | a | 19.58 | 31.57 | 44.61 | c | 50.24 | a | 53.87 | 56.23 | 47.13 | 35.45 | b | 28.57 | b | 12.03 | 34.35 | ||||||||
1999 | 0.97 | 10.89 | 17.03 | 31.90 | 44.13 | 51.40 | 59.03 | 52.39 | 43.17 | a | 30.84 | 26.81 | c | 10.39 | 31.58 | |||||||||||
2000 | 0.06 | 10.30 | b | 24.29 | 28.29 | b | 42.97 | 49.57 | 52.52 | 52.94 | 43.67 | 35.48 | d | 25.00 | a | -2.65 | e | 30.20 | ||||||||
2001 | 6.67 | g | 2.12 | d | 16.52 | d | 30.38 | a | 42.07 | c | 50.47 | 53.35 | 54.03 | 45.17 | a | 32.33 | a | 30.40 | e | 16.95 | j | 35.69 | b | |||
2002 | 11.78 | h | 12.00 | h | 9.86 | i | 27.63 | c | 36.03 | b | 52.55 | a | 58.42 | 54.43 | a | 48.22 | c | 30.68 | 19.96 | c | 14.41 | b | 38.04 | c | ||
2003 | 2.94 | -2.96 | 13.32 | 26.77 | 37.80 | f | 47.97 | a | 53.81 | 56.23 | 45.86 | a | 32.68 | 23.05 | h | 15.45 | i | 30.73 | c | |||||||
2004 | -3.68 | l | 9.23 | p | 21.76 | j | 28.88 | f | 39.35 | 48.30 | g | 53.07 | d | 48.73 | a | 46.50 | b | 35.03 | a | 26.10 | 7.79 | b | 36.66 | e | ||
2005 | 1.43 | a | 11.54 | 10.47 | a | 30.41 | a | 39.35 | 55.72 | a | 55.23 | 54.83 | a | 48.57 | 37.85 | e | 25.03 | a | 12.00 | 31.87 | ||||||
2006 | 17.00 | 6.14 | 19.29 | 32.03 | 43.70 | a | 49.83 | 56.13 | 53.83 | b | 43.07 | a | 31.10 | a | 28.10 | a | 19.46 | c | 33.31 | |||||||
2007 | 10.67 | a | 2.50 | b | 19.93 | b | 28.32 | e | 42.61 | 51.63 | 54.71 | 54.90 | b | 47.47 | 40.33 | a | 23.13 | 7.00 | 31.93 | |||||||
2008 | 6.07 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 6.07 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 2.49 | 5.51 | 16.49 | 28.91 | 39.73 | 49.12 | 53.98 | 52.38 | 44.26 | 33.74 | 22.83 | 9.44 | 29.86 | |||||||||||||
S.D. | 6.10 | 6.16 | 4.44 | 2.88 | 3.00 | 3.20 | 2.21 | 3.08 | 2.84 | 3.41 | 3.97 | 6.08 | 1.95 | |||||||||||||
SKEW | 0.19 | 0.47 | 0.01 | -0.30 | 0.06 | -0.15 | 0.09 | -0.04 | -0.18 | 0.58 | -0.54 | -0.72 | 0.22 | |||||||||||||
MAX | 17.00 | 21.22 | 26.29 | 33.97 | 44.70 | 55.72 | 59.03 | 60.55 | 49.31 | 43.42 | 30.40 | 19.46 | 34.35 | |||||||||||||
MIN | -9.58 | -4.63 | 9.00 | 22.90 | 33.89 | 42.55 | 49.79 | 45.66 | 37.93 | 26.68 | 13.67 | -4.00 | 26.21 | |||||||||||||
YRS | 37 | 37 | 36 | 38 | 36 | 38 | 38 | 40 | 40 | 40 | 38 | 37 | 30 |