YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 26.18 | p | 14.97 | 14.97 | k | |
1959 | 10.28 | b | 16.54 | 33.20 | a | 46.70 | 60.18 | a | 69.64 | a | 72.13 | 73.36 | i | 62.52 | 44.18 | 25.15 | 28.21 | 42.61 | a | |||||||
1960 | 14.16 | 15.84 | 19.50 | 45.50 | 57.66 | 64.88 | 72.02 | a | 72.33 | a | 61.10 | 48.85 | a | 33.75 | 17.11 | 43.56 | ||||||||||
1961 | 12.63 | 23.05 | 33.82 | 38.08 | 53.85 | 66.88 | b | 69.27 | 70.94 | 58.87 | 49.52 | 31.65 | c | 14.18 | 43.56 | |||||||||||
1962 | 7.73 | a | 11.98 | 25.26 | 41.37 | 59.98 | 65.70 | 67.27 | 68.56 | 57.29 | a | 49.47 | n | 37.93 | g | 21.31 | 42.65 | b | ||||||||
1963 | 5.85 | 15.05 | 35.16 | 48.93 | 56.45 | 70.37 | 73.44 | 69.90 | 64.00 | a | 59.42 | 39.23 | 10.37 | 45.68 | ||||||||||||
1964 | 20.48 | ----- | z | ----- | z | 47.53 | 62.47 | 69.45 | 76.55 | 68.34 | 60.38 | 49.39 | 35.45 | 12.26 | 50.23 | b | ||||||||||
1965 | 8.61 | 11.79 | 18.16 | 42.30 | 59.98 | 67.37 | 70.90 | 69.22 | a | 52.87 | 51.74 | 33.40 | 27.10 | a | 42.79 | |||||||||||
1966 | 3.08 | 14.59 | 35.67 | b | 41.90 | a | 54.40 | 68.17 | 75.89 | 67.94 | 55.42 | r | 48.79 | 29.07 | 18.00 | g | 43.95 | b | ||||||||
1967 | ----- | z | ----- | z | ----- | z | 44.25 | 53.19 | 66.48 | 69.63 | 68.02 | 60.68 | 47.39 | 32.12 | 21.92 | 51.52 | c | |||||||||
1968 | 13.31 | 13.10 | 38.97 | 48.85 | 54.18 | 66.65 | 70.23 | 71.07 | c | 61.12 | 51.05 | 32.70 | 15.97 | 44.77 | ||||||||||||
1969 | 7.39 | 18.29 | 23.27 | 48.08 | 59.92 | 60.87 | 71.56 | 72.94 | 62.32 | 45.58 | 32.27 | 19.29 | 43.48 | |||||||||||||
1970 | 4.35 | 14.48 | 23.39 | 43.60 | 56.97 | 69.75 | 73.69 | 71.13 | 60.60 | 48.31 | 30.33 | 16.08 | 42.72 | |||||||||||||
1971 | 5.21 | 16.18 | 26.53 | 46.87 | 55.16 | 70.25 | 67.81 | 69.40 | 62.28 | 53.65 | 32.92 | 17.11 | 43.61 | |||||||||||||
1972 | 6.87 | -0.79 | v | ----- | z | ----- | z | 62.37 | 67.73 | 70.37 | 70.87 | 59.40 | 45.45 | 32.05 | 11.05 | 47.35 | c | |||||||||
1973 | 16.48 | 21.23 | 39.84 | 45.08 | 56.37 | 70.05 | 72.83 | a | 73.31 | 60.27 | 54.87 | 34.10 | 16.61 | 46.75 | ||||||||||||
1974 | 11.61 | 16.32 | 28.65 | 47.02 | 54.82 | 66.60 | 76.97 | 67.58 | 58.15 | 50.89 | 33.92 | 23.13 | 44.64 | |||||||||||||
1975 | 13.47 | 15.27 | 22.03 | 37.98 | 61.42 | 68.47 | 75.61 | 71.55 | 57.87 | 52.26 | 35.57 | 17.84 | 44.11 | |||||||||||||
1976 | 9.29 | 25.62 | 30.11 | 51.47 | 58.44 | 71.27 | 75.26 | 73.29 | 61.28 | 43.35 | 26.52 | 9.90 | 44.65 | |||||||||||||
1977 | -0.87 | 21.77 | 35.85 | 52.80 | 66.68 | 68.05 | 74.16 | 66.68 | 60.63 | 48.26 | 30.95 | 13.53 | 44.87 | |||||||||||||
1978 | 4.65 | 10.11 | 28.45 | 44.42 | 60.82 | 67.28 | 70.77 | 71.03 | 66.32 | 50.15 | 30.93 | 12.26 | 43.10 | |||||||||||||
1979 | 0.31 | 7.82 | 26.95 | 41.85 | 54.40 | 66.87 | 72.11 | 67.95 | 63.10 | 47.45 | 30.77 | 25.02 | 42.05 | |||||||||||||
1980 | 13.47 | 14.09 | 25.16 | 49.55 | 62.50 | 67.47 | 74.29 | 70.45 | 60.24 | a | 45.47 | 36.35 | 19.29 | 44.86 | ||||||||||||
1981 | 17.79 | 22.93 | 38.11 | 49.52 | 57.40 | 66.60 | 71.84 | 69.16 | 60.08 | 46.48 | 37.22 | 16.18 | 46.11 | |||||||||||||
1982 | 0.45 | 14.46 | 27.31 | 43.18 | 61.55 | 63.08 | 73.77 | 70.37 | 60.12 | 49.76 | 28.60 | 24.29 | 43.08 | |||||||||||||
1983 | 17.13 | 24.70 | 32.24 | 41.93 | 54.23 | 66.73 | 76.06 | 75.84 | 62.32 | 48.74 | 33.32 | 1.98 | 44.60 | |||||||||||||
1984 | 10.77 | 26.64 | 23.40 | a | 46.17 | 56.18 | 68.72 | 72.02 | 72.82 | 57.17 | 50.69 | b | 33.02 | a | 16.81 | 44.53 | ||||||||||
1985 | 9.90 | a | 14.96 | 34.95 | 51.45 | 62.76 | 64.20 | 72.05 | 65.61 | 59.32 | 46.82 | 23.10 | 6.74 | 42.66 | ||||||||||||
1986 | 16.69 | 14.36 | 33.45 | 49.62 | 59.11 | 69.52 | 73.40 | 66.79 | 59.52 | 48.34 | 27.77 | 22.82 | a | 45.12 | ||||||||||||
1987 | 21.25 | a | 31.43 | 38.70 | u | 59.12 | r | 63.90 | 72.38 | 75.42 | 68.85 | 62.55 | 45.23 | 36.98 | 23.38 | a | 50.14 | b | ||||||||
1988 | 9.11 | 12.47 | 32.74 | 47.98 | 65.82 | 74.68 | 77.55 | 73.98 | 62.14 | a | 44.48 | 31.13 | 18.79 | 45.91 | ||||||||||||
1989 | 19.48 | 7.95 | 25.24 | 44.83 | 57.98 | 67.20 | 74.97 | 70.15 | 60.53 | 50.50 | 27.45 | 9.52 | 42.98 | |||||||||||||
1990 | 25.05 | 22.43 | a | 34.50 | 46.92 | 55.87 | 68.98 | 70.79 | 70.23 | 64.40 | a | 46.68 | a | 35.73 | 15.83 | b | 46.45 | |||||||||
1991 | 10.89 | c | 20.63 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.66 | 57.32 | 45.15 | 23.10 | 17.53 | 34.90 | e | |||||
1992 | 18.92 | 24.70 | a | 30.39 | 40.17 | 58.64 | b | 63.53 | 63.69 | b | 63.85 | 56.95 | a | 45.32 | 29.20 | 18.98 | a | 42.86 | ||||||||
1993 | 9.24 | 14.50 | a | 25.71 | 41.77 | 55.35 | 63.07 | a | 68.27 | 68.35 | 52.64 | a | 43.79 | 28.20 | 18.02 | 40.74 | ||||||||||
1994 | ----- | z | 5.69 | b | 30.50 | a | 42.62 | a | 59.47 | a | 67.93 | a | 68.48 | 65.59 | b | 62.59 | b | 50.29 | 35.75 | 20.09 | d | 46.27 | a | |||
1995 | 14.35 | 15.14 | 31.37 | a | 39.02 | b | 55.02 | c | 69.92 | 70.83 | a | 71.40 | a | 57.38 | 46.00 | a | 24.12 | a | 17.21 | b | 42.65 | |||||
1996 | 5.81 | b | 12.82 | a | 21.08 | 38.67 | 53.63 | 66.75 | 68.82 | 68.72 | b | 59.98 | c | 47.40 | 23.88 | a | 10.78 | b | 39.86 | |||||||
1997 | 5.95 | 16.52 | 25.48 | c | 41.68 | 50.80 | a | 70.00 | a | 69.78 | a | 66.75 | a | 61.61 | b | 48.23 | 26.48 | 26.13 | a | 42.45 | ||||||
1998 | 15.65 | 30.28 | c | 29.52 | 48.60 | 63.00 | 63.93 | 71.45 | 70.41 | b | 63.69 | a | 50.15 | 35.26 | a | 22.62 | a | 47.05 | ||||||||
1999 | 8.76 | b | 25.23 | 32.72 | f | 46.10 | a | 58.90 | a | 64.50 | c | 73.81 | 68.15 | a | 58.72 | 47.00 | a | 39.93 | a | 23.50 | c | 46.78 | a | |||
2000 | 11.77 | a | 23.36 | 38.29 | 43.31 | a | 59.13 | 63.62 | a | 70.67 | b | 70.92 | a | 58.53 | a | 50.89 | 30.34 | b | 5.64 | b | 43.87 | |||||
2001 | 16.85 | d | 7.45 | 24.28 | d | 44.70 | 57.56 | e | 67.41 | c | 71.93 | c | 71.84 | c | 58.84 | a | 47.31 | b | 43.12 | b | 25.85 | a | 44.76 | |||
2002 | 20.02 | f | 24.96 | a | ----- | z | ----- | z | ----- | z | 68.78 | a | 74.60 | 68.54 | c | 61.84 | a | 40.44 | g | 31.10 | a | 23.43 | a | 50.46 | e | |
2003 | 12.29 | b | ----- | z | ----- | z | ----- | z | ----- | z | 65.63 | c | 70.64 | b | 74.02 | e | 59.68 | e | 50.10 | 30.05 | 22.34 | f | 51.77 | e | ||
2004 | 9.42 | 20.29 | a | 34.48 | 48.75 | 54.48 | d | 63.72 | 69.24 | 63.87 | l | 64.00 | f | 49.31 | e | 36.07 | 19.84 | c | 40.56 | b | ||||||
2005 | 13.48 | 24.43 | 30.69 | 53.73 | h | 54.73 | 70.27 | 73.70 | c | 69.50 | a | 63.83 | d | 50.68 | 34.29 | d | 13.04 | h | 48.56 | b | ||||||
2006 | 26.29 | 16.38 | 32.32 | 51.93 | a | 59.45 | 68.10 | 76.10 | 70.52 | a | 55.47 | k | 43.45 | 34.05 | 24.27 | k | 47.86 | b | ||||||||
2007 | 13.46 | h | 9.57 | a | 26.79 | x | 44.50 | 60.64 | b | 68.14 | w | 71.85 | 67.95 | 60.25 | 51.19 | 32.98 | 12.69 | 45.74 | c | |||||||
2008 | 9.58 | 11.64 | 24.74 | 40.22 | 53.10 | 65.28 | 70.94 | 68.95 | 60.87 | 46.92 | a | 33.25 | 10.73 | a | 41.35 | |||||||||||
2009 | 3.95 | b | 17.02 | 27.85 | 44.53 | 56.34 | 64.21 | a | 66.34 | 65.84 | 63.40 | 40.87 | 39.60 | 14.79 | 42.06 | |||||||||||
2010 | 9.94 | 15.62 | 36.21 | 51.98 | 57.11 | 65.03 | 72.34 | b | 71.65 | 57.22 | a | 50.82 | 32.80 | 14.32 | 44.59 | |||||||||||
2011 | 8.18 | 16.39 | 24.63 | 43.32 | 55.26 | 65.63 | 74.94 | 69.55 | 60.09 | a | 52.61 | 35.12 | 25.24 | 44.25 | ||||||||||||
2012 | 20.97 | 25.53 | 46.68 | 48.20 | 61.02 | 68.42 | 76.26 | 67.72 | b | 59.63 | 44.87 | 33.42 | 18.90 | 47.63 | ||||||||||||
2013 | 12.73 | 15.05 | 22.69 | 30.00 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.82 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 11.39 | 17.42 | 29.76 | 45.33 | 58.05 | 67.27 | 72.18 | 69.73 | 60.28 | 48.39 | 32.18 | 17.39 | 43.97 | |||||||||||||
S.D. | 6.10 | 6.02 | 6.06 | 3.90 | 3.53 | 2.66 | 2.93 | 2.41 | 2.61 | 3.29 | 4.33 | 5.84 | 1.72 | |||||||||||||
SKEW | 0.29 | 0.31 | 0.35 | -0.00 | 0.34 | 0.10 | -0.37 | 0.08 | -0.59 | 0.52 | -0.13 | -0.31 | -0.04 | |||||||||||||
MAX | 26.29 | 31.43 | 46.68 | 52.80 | 66.68 | 74.68 | 77.55 | 75.84 | 66.32 | 59.42 | 43.12 | 28.21 | 47.63 | |||||||||||||
MIN | -0.87 | 5.69 | 18.16 | 37.98 | 50.80 | 60.87 | 63.69 | 63.85 | 52.64 | 40.87 | 23.10 | 1.98 | 39.86 | |||||||||||||
YRS | 51 | 51 | 46 | 48 | 51 | 52 | 53 | 52 | 51 | 52 | 53 | 51 | 38 |