YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 25.00 | g | 39.29 | 53.07 | 52.23 | 52.61 | 40.37 | 32.23 | 21.97 | 12.77 | 38.07 | d | ||||||||
1989 | 13.03 | 6.14 | 20.45 | 28.67 | 38.87 | 45.86 | b | 53.68 | c | 51.52 | d | 42.27 | 30.16 | 22.50 | 8.00 | b | 30.10 | |||||||||
1990 | 16.74 | 14.79 | 21.45 | 29.27 | 35.20 | a | 50.00 | 52.14 | b | 50.32 | 45.44 | c | 29.29 | 22.10 | 5.45 | b | 31.02 | |||||||||
1991 | 8.32 | 19.68 | 21.90 | 28.70 | 40.61 | 49.79 | a | 52.14 | j | 52.97 | 42.70 | c | 27.07 | c | 21.30 | 12.90 | b | 29.63 | a | |||||||
1992 | 13.97 | b | 20.90 | 25.45 | 29.69 | a | 41.25 | g | 50.71 | i | 51.45 | 48.87 | 42.31 | a | 30.16 | 19.00 | 8.04 | d | 28.98 | b | ||||||
1993 | 11.35 | 10.75 | 25.38 | b | 30.47 | 39.45 | 44.96 | b | 51.18 | c | 50.50 | g | 38.44 | c | 29.00 | 14.17 | 16.90 | 28.37 | a | |||||||
1994 | 16.13 | 9.57 | 22.71 | 29.41 | a | 40.74 | d | 48.75 | b | 52.04 | d | 53.08 | g | 43.20 | 33.23 | 20.07 | 16.45 | 30.21 | a | |||||||
1995 | 13.39 | 17.48 | a | 20.13 | a | 26.70 | 36.93 | b | 46.59 | c | 50.79 | g | 51.85 | d | 41.61 | b | 27.71 | 22.48 | a | 13.55 | b | 28.95 | a | |||
1996 | 7.35 | 13.07 | 16.53 | a | 27.80 | 39.35 | 47.26 | c | 53.90 | 51.33 | g | 42.93 | 30.39 | 19.57 | 14.03 | a | 28.38 | a | ||||||||
1997 | 11.03 | 14.36 | 21.87 | 25.34 | a | 37.39 | 50.37 | 52.42 | 52.94 | 44.63 | 30.03 | 18.77 | 15.06 | 31.18 | ||||||||||||
1998 | 12.57 | a | 18.54 | 20.97 | 27.23 | 40.42 | 43.30 | 56.06 | 52.48 | 46.03 | a | 33.35 | 25.83 | 11.21 | b | 32.33 | ||||||||||
1999 | 17.87 | 19.89 | 20.52 | 27.93 | 38.10 | 47.41 | a | 54.83 | a | 53.63 | a | 39.24 | a | 28.53 | a | 22.17 | 18.23 | 32.36 | ||||||||
2000 | 16.63 | a | 19.59 | 24.16 | 27.53 | 40.37 | a | 45.93 | 54.60 | a | 54.16 | 41.63 | 31.90 | 12.60 | 8.97 | 31.51 | ||||||||||
2001 | 13.13 | 13.65 | b | 22.35 | 31.33 | 40.35 | 47.72 | a | 56.87 | 51.23 | a | 42.97 | 30.06 | 20.57 | 14.13 | a | 32.03 | |||||||||
2002 | 12.13 | 11.93 | 15.06 | 29.14 | b | 34.93 | a | 50.77 | 56.19 | 51.84 | 43.87 | 25.45 | 21.33 | 17.03 | 30.81 | |||||||||||
2003 | 16.87 | 11.36 | 22.94 | 33.07 | b | 41.29 | 47.32 | b | 56.55 | b | 54.70 | a | 39.86 | a | 31.61 | 19.72 | a | 15.35 | 32.55 | |||||||
2004 | 13.90 | 13.38 | 24.13 | 30.37 | 37.67 | g | 46.75 | f | 52.45 | 47.71 | 43.07 | 33.45 | 19.57 | 16.74 | 29.48 | b | ||||||||||
2005 | 15.42 | 17.11 | 21.55 | 28.20 | 36.94 | 49.27 | 54.23 | 50.23 | 43.10 | 31.74 | 23.76 | a | 13.35 | 32.07 | ||||||||||||
2006 | 18.71 | 11.61 | 18.52 | 29.37 | 38.74 | 50.37 | 56.61 | 54.17 | a | 37.67 | 30.19 | 20.43 | 13.45 | 31.65 | ||||||||||||
2007 | 8.20 | a | 12.93 | a | 25.23 | 28.47 | 40.19 | 49.10 | 57.68 | 56.48 | 43.93 | 32.83 | a | 20.30 | 8.00 | 31.94 | ||||||||||
2008 | 7.97 | a | 15.14 | 19.94 | 24.73 | 37.87 | 46.86 | a | 53.58 | 51.68 | 40.30 | 29.32 | 24.90 | a | ----- | z | 32.03 | a | ||||||||
2009 | 14.94 | 17.46 | 18.16 | 28.20 | 40.68 | 48.77 | 52.20 | a | 49.28 | f | 41.27 | 25.61 | ----- | z | ----- | z | 31.92 | c | ||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.32 | 14.73 | 21.40 | 28.65 | 38.89 | 48.17 | 54.04 | 52.19 | 42.13 | 30.15 | 20.62 | 12.98 | 31.63 | |||||||||||||
S.D. | 3.37 | 3.89 | 2.79 | 1.88 | 1.85 | 2.29 | 2.03 | 2.12 | 2.16 | 2.32 | 3.04 | 3.62 | 0.74 | |||||||||||||
SKEW | -0.32 | -0.19 | -0.47 | 0.08 | -0.74 | -0.05 | 0.29 | -0.17 | -0.29 | -0.43 | -0.96 | -0.54 | -0.66 | |||||||||||||
MAX | 18.71 | 20.90 | 25.45 | 33.07 | 41.29 | 53.07 | 57.68 | 56.48 | 46.03 | 33.45 | 25.83 | 18.23 | 32.55 | |||||||||||||
MIN | 7.35 | 6.14 | 15.06 | 24.73 | 34.93 | 43.30 | 51.18 | 47.71 | 37.67 | 25.45 | 12.60 | 5.45 | 30.10 | |||||||||||||
YRS | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 18 | 22 | 22 | 21 | 20 | 12 |