YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | 41.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.26 | k | |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | 41.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.84 | k | |
1971 | ----- | z | ----- | z | 16.88 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -2.28 | m | ----- | z |
1972 | -12.50 | i | -8.62 | e | 11.64 | f | 29.79 | a | ----- | z | 51.11 | b | 52.03 | 53.90 | b | 40.43 | b | 28.71 | 17.00 | a | -6.94 | 28.60 | c | |||
1973 | ----- | z | 1.30 | a | ----- | z | 26.52 | a | 39.71 | 50.46 | b | 53.48 | b | 56.00 | ----- | z | 38.00 | 13.43 | -1.96 | c | 30.77 | c | ||||
1974 | -14.84 | -8.25 | 5.42 | 27.50 | b | 39.42 | 51.73 | 58.70 | a | 50.13 | 37.53 | 31.00 | ----- | z | ----- | z | 27.83 | b | ||||||||
1975 | -3.47 | a | -6.15 | a | 3.42 | 25.20 | ----- | z | ----- | z | 59.00 | 51.62 | b | 41.47 | 35.77 | 21.00 | -1.13 | 22.67 | b | |||||||
1976 | -6.63 | a | 5.00 | a | ----- | z | 34.17 | 39.58 | 54.23 | 54.33 | a | 53.23 | 41.39 | b | ----- | z | ----- | z | ----- | z | 34.41 | d | ||||
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.62 | a | ----- | z | 15.62 | k |
1978 | ----- | z | -6.82 | 11.87 | 31.30 | 45.90 | 49.83 | a | 55.38 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.24 | f | ||||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -3.26 | -3.26 | k | |
1991 | -10.42 | 6.46 | 15.32 | 34.17 | 49.03 | 57.50 | 58.58 | 58.13 | a | 45.10 | a | 27.16 | 11.00 | a | 4.59 | d | 29.72 | |||||||||
1992 | 5.00 | b | 8.22 | b | 20.58 | 29.27 | 44.58 | 51.40 | 51.77 | 51.45 | 42.13 | 29.45 | 19.93 | -2.23 | 29.30 | |||||||||||
1993 | -8.77 | a | -3.89 | 15.19 | 29.50 | 42.61 | 50.67 | 55.87 | 54.42 | 40.80 | 27.68 | 15.93 | a | 3.23 | 26.94 | |||||||||||
1994 | -16.28 | b | -10.79 | 19.87 | 29.00 | 43.19 | 54.87 | 55.57 | a | 53.42 | 47.57 | 38.65 | 21.73 | 8.80 | a | 28.80 | ||||||||||
1995 | -1.48 | -1.33 | a | 17.45 | 26.50 | 41.48 | 59.20 | 57.61 | 58.13 | 43.57 | 34.35 | 10.27 | -2.43 | a | 28.61 | |||||||||||
1996 | -15.60 | a | -2.93 | 4.42 | 24.07 | 42.65 | 55.00 | c | 56.81 | 56.68 | 47.34 | a | 34.46 | c | 7.13 | -4.53 | a | 25.46 | ||||||||
1997 | ----- | z | 0.20 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.71 | 49.43 | ----- | z | ----- | z | 17.81 | 30.79 | h | |||
1998 | 1.30 | a | 21.38 | b | 18.60 | a | 36.79 | a | 48.00 | 52.86 | a | 58.61 | 58.55 | 49.20 | 37.90 | 22.64 | b | 5.45 | 34.27 | |||||||
1999 | -3.70 | a | 11.96 | 20.87 | a | 35.10 | 47.23 | a | 53.29 | b | 58.79 | b | 55.48 | 45.30 | 33.13 | a | 24.34 | a | ----- | z | 34.71 | a | ||||
2000 | -2.21 | b | 12.55 | 24.55 | 28.59 | c | 43.44 | d | 51.39 | b | 58.62 | b | 56.28 | b | 45.24 | a | 36.60 | a | 20.37 | c | -10.61 | 30.40 | ||||
2001 | 4.14 | b | -4.85 | b | 17.81 | j | 35.39 | g | 47.04 | c | 54.43 | i | 59.93 | c | 58.24 | f | 48.62 | d | 32.97 | a | 28.32 | e | 10.71 | g | 30.88 | e |
2002 | 5.30 | d | 12.38 | b | 7.87 | a | 27.14 | h | 35.74 | h | 57.57 | g | 60.85 | d | 56.07 | c | 50.71 | i | 27.50 | c | 19.16 | e | 12.05 | j | 27.02 | e |
2003 | 0.65 | e | -4.42 | i | 9.33 | g | 26.10 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.65 | k |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -4.47 | 1.44 | 14.26 | 29.83 | 43.56 | 53.11 | 56.82 | 54.95 | 44.34 | 32.89 | 17.86 | 0.52 | 29.19 | |||||||||||||
S.D. | 7.39 | 9.08 | 7.02 | 3.79 | 3.10 | 2.77 | 2.72 | 2.51 | 3.65 | 4.08 | 5.73 | 7.42 | 2.59 | |||||||||||||
SKEW | -0.30 | 0.57 | -0.32 | 0.37 | 0.32 | 0.88 | -0.51 | -0.35 | -0.14 | -0.08 | -0.18 | 0.83 | 0.61 | |||||||||||||
MAX | 5.30 | 21.38 | 24.55 | 36.79 | 49.03 | 59.20 | 60.85 | 58.55 | 49.43 | 38.65 | 28.32 | 17.81 | 34.27 | |||||||||||||
MIN | -16.28 | -10.79 | 3.42 | 24.07 | 39.42 | 49.83 | 51.77 | 50.13 | 37.53 | 27.16 | 7.13 | -10.61 | 25.46 | |||||||||||||
YRS | 15 | 18 | 13 | 15 | 16 | 14 | 17 | 16 | 15 | 15 | 15 | 13 | 8 |