YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1970 | ----- | z | ----- | z | 16.39 | 18.38 | a | 34.45 | 37.80 | 47.66 | b | 49.42 | e | 37.66 | a | 25.77 | a | 19.87 | g | 12.37 | d | 31.10 | c | |||
1971 | 6.55 | b | 8.38 | d | 14.87 | 24.30 | c | 31.61 | c | 41.76 | a | 47.00 | e | 46.31 | r | ----- | z | ----- | z | ----- | z | ----- | z | 24.92 | e | |
1972 | ----- | z | 12.69 | c | 22.18 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 13.15 | j | 10.67 | j | 12.69 | k |
1973 | 6.71 | j | 10.70 | h | 17.50 | g | 18.00 | g | 31.62 | b | 39.60 | e | 47.19 | 46.07 | c | 36.52 | e | 28.86 | b | 18.35 | g | 10.31 | e | 34.31 | e | |
1974 | 7.85 | k | 4.56 | l | 21.41 | i | 23.00 | h | 33.24 | f | 44.81 | d | 46.42 | e | 43.43 | c | 38.33 | f | 33.15 | d | 18.27 | d | 6.04 | g | 37.22 | g |
1975 | 4.41 | i | 7.95 | h | 15.14 | j | 19.78 | g | 30.04 | e | 38.81 | d | 46.23 | e | 44.65 | e | 38.85 | j | 27.41 | i | 14.90 | i | 10.44 | d | 34.04 | g |
1976 | 4.85 | k | 15.43 | h | 13.92 | g | 24.71 | f | 31.50 | k | 37.80 | j | 46.08 | e | 43.56 | d | 40.00 | g | 25.88 | g | 19.17 | f | 8.38 | b | 32.67 | i |
1977 | 6.00 | e | 12.05 | g | 11.28 | f | 26.18 | h | 30.42 | g | 43.80 | e | 46.78 | d | 46.50 | c | 39.86 | h | 29.97 | b | 19.96 | e | 13.70 | k | 32.17 | f |
1978 | 8.89 | d | 10.48 | g | 20.25 | k | 24.64 | h | 28.46 | e | 39.52 | i | 47.03 | a | 43.64 | c | 38.22 | c | 33.24 | b | 23.58 | d | 7.24 | f | 31.87 | e |
1979 | 4.05 | j | 11.52 | g | 19.79 | c | 23.08 | d | 32.67 | d | 38.83 | g | 47.50 | e | 45.72 | b | 41.24 | e | 31.52 | h | 13.46 | d | 13.86 | j | 31.92 | e |
1980 | 15.20 | k | 13.31 | c | 15.76 | n | 22.28 | l | 30.90 | k | 40.25 | j | 49.50 | k | 45.82 | i | 39.45 | j | 28.24 | j | 20.82 | m | 19.11 | m | 13.31 | k |
1981 | 14.61 | h | 12.53 | m | 18.76 | n | 27.67 | l | 32.11 | m | 42.38 | i | 50.39 | h | 47.52 | h | 41.92 | e | 28.38 | g | 22.73 | h | 12.47 | l | 41.92 | k |
1982 | 6.78 | m | 12.79 | d | 19.90 | a | 24.36 | h | 32.08 | g | 40.23 | h | 47.78 | d | 49.21 | l | 42.17 | g | 28.10 | k | 21.70 | j | 12.10 | k | 26.82 | i |
1983 | 13.88 | g | 16.11 | 21.37 | a | 22.31 | d | 30.32 | l | 39.44 | l | 45.53 | n | 49.88 | f | 42.72 | l | 32.54 | e | 22.71 | i | 11.16 | l | 23.08 | h | |
1984 | 7.09 | h | 12.33 | b | 18.90 | 23.17 | 35.00 | f | 41.17 | f | 49.67 | g | 48.54 | g | 42.78 | g | 28.86 | j | 19.65 | j | 18.15 | k | 18.13 | i | ||
1985 | 12.50 | g | 11.93 | a | 20.47 | a | 27.80 | 34.08 | f | 41.94 | m | 50.74 | h | 48.33 | g | 36.95 | j | 30.95 | j | 20.58 | k | 13.25 | c | 18.36 | h | |
1986 | 17.12 | f | 19.89 | a | 24.55 | 27.43 | 34.18 | c | 44.75 | f | 48.14 | b | 49.73 | a | 37.90 | i | 29.88 | f | 21.74 | g | 13.88 | g | 33.99 | f | ||
1987 | 10.88 | g | 15.90 | h | 18.19 | e | 26.75 | f | 34.14 | c | 44.43 | b | 46.64 | c | 46.19 | e | 40.04 | g | 31.62 | g | 20.12 | f | 10.64 | f | 37.92 | g |
1988 | 5.67 | g | 14.08 | e | 18.13 | a | 29.50 | b | 34.76 | b | 46.34 | a | 50.53 | a | 50.87 | 39.97 | a | 35.83 | b | 18.82 | b | 12.75 | g | 33.88 | b | |
1989 | 12.26 | l | 18.17 | d | 25.55 | i | 30.30 | c | 38.95 | i | 45.29 | i | 52.82 | c | 48.97 | b | 41.04 | e | 28.03 | 20.79 | f | 10.78 | d | 32.87 | e | |
1990 | 8.74 | h | 13.67 | a | 23.66 | b | 30.11 | b | 31.13 | 44.72 | a | 48.13 | 46.93 | b | 45.46 | b | 29.48 | d | 23.30 | c | 9.17 | g | 33.66 | b | ||
1991 | 9.52 | h | 18.23 | f | 20.65 | 25.25 | b | 33.53 | a | 41.50 | d | 47.52 | 48.41 | b | 41.57 | b | 32.44 | d | 19.90 | j | 13.52 | h | 36.36 | d | ||
1992 | 10.82 | i | 19.31 | 23.81 | 30.33 | 38.06 | 43.90 | 48.29 | 45.97 | 40.00 | 32.52 | b | 16.55 | a | 12.00 | c | 31.89 | a | ||||||||
1993 | 16.86 | i | 18.75 | d | 21.61 | 26.82 | b | 36.43 | a | 41.73 | 46.52 | 48.63 | a | 39.59 | a | 31.17 | a | 18.19 | c | 12.42 | l | 32.94 | b | |||
1994 | 11.69 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | 33.71 | w | 35.23 | 43.33 | 49.45 | 51.65 | 44.28 | a | 32.24 | b | 27.72 | a | 19.77 | 37.96 | d | |||||
1996 | 14.23 | 21.39 | a | 22.29 | 29.60 | 39.97 | 48.24 | a | 52.77 | 50.67 | a | 40.68 | b | 33.03 | a | 24.80 | 14.68 | c | 32.70 | |||||||
1997 | 12.00 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.00 | x | 47.43 | 32.37 | a | 23.80 | 14.58 | 29.55 | h | |||
1998 | 16.23 | 17.25 | 21.50 | c | 25.91 | h | 35.08 | e | 44.30 | c | 52.81 | d | 51.39 | c | 46.76 | a | 34.75 | o | 24.50 | b | 17.59 | b | 32.74 | b | ||
1999 | 17.56 | d | 19.70 | e | 28.50 | o | 24.82 | b | 33.73 | a | 43.37 | 50.93 | b | 50.00 | b | 42.07 | a | 33.15 | d | 28.11 | b | 15.07 | a | 32.59 | a | |
2000 | 17.28 | b | 20.96 | a | 24.77 | 31.25 | b | 40.61 | 48.20 | 51.55 | 52.74 | 45.70 | 35.55 | 18.17 | 16.43 | a | 33.60 | |||||||||
2001 | 12.69 | b | 19.50 | b | 21.96 | g | 31.10 | i | 40.03 | b | 46.78 | c | 53.50 | i | 49.96 | c | 45.59 | a | 35.07 | a | 27.36 | b | 13.33 | a | 32.26 | c |
2002 | 13.50 | a | 12.75 | 19.43 | a | 32.45 | a | 39.00 | 50.38 | a | 50.07 | a | 51.07 | a | 41.90 | 32.71 | 22.79 | a | 14.46 | e | 31.71 | |||||
2003 | 19.63 | d | 17.42 | b | 21.03 | a | 27.62 | d | 38.39 | 44.10 | 54.29 | 51.39 | 42.55 | a | 36.00 | c | 22.66 | a | 16.00 | 32.59 | ||||||
2004 | 13.58 | 11.50 | a | 26.81 | 30.27 | 36.81 | 43.28 | a | 48.47 | a | 47.48 | b | 39.71 | b | 31.35 | e | 24.62 | v | ----- | z | 32.92 | b | ||||
2005 | 19.37 | l | 20.11 | 21.42 | 26.93 | b | 38.45 | b | 42.37 | 52.00 | m | ----- | z | ----- | z | 33.00 | d | 22.41 | c | 14.14 | i | 29.24 | e | |||
2006 | 13.38 | e | 14.93 | a | 21.50 | a | 28.92 | f | 38.38 | g | 48.10 | a | 52.28 | b | 50.62 | b | 38.73 | d | 31.25 | c | 22.70 | g | 15.05 | l | 33.85 | d |
2007 | 10.05 | k | 15.00 | n | 23.61 | m | 29.38 | i | 36.12 | f | 45.62 | d | 51.77 | 51.72 | b | 44.13 | g | 31.76 | j | 24.81 | d | 14.14 | j | 43.48 | h | |
2008 | 2.77 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.77 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.48 | 15.95 | 20.96 | 27.08 | 35.15 | 44.05 | 49.02 | 48.42 | 41.75 | 32.12 | 22.07 | 13.72 | 32.65 | |||||||||||||
S.D. | 5.04 | 3.67 | 2.79 | 3.60 | 3.38 | 3.06 | 2.47 | 2.81 | 3.02 | 2.49 | 4.01 | 2.98 | 0.77 | |||||||||||||
SKEW | -0.53 | -0.17 | -0.07 | -0.64 | -0.07 | -0.04 | 0.63 | -0.36 | 0.32 | -0.62 | -0.36 | 0.15 | 0.03 | |||||||||||||
MAX | 19.63 | 21.39 | 26.81 | 32.45 | 40.61 | 50.38 | 54.29 | 52.74 | 47.43 | 36.00 | 28.11 | 19.77 | 33.60 | |||||||||||||
MIN | 2.77 | 8.38 | 14.87 | 18.38 | 28.46 | 37.80 | 46.08 | 43.43 | 36.52 | 25.77 | 13.46 | 8.38 | 31.71 | |||||||||||||
YRS | 13 | 23 | 22 | 20 | 23 | 24 | 28 | 27 | 22 | 23 | 19 | 16 | 4 |