YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | 9.63 | 11.66 | 31.48 | 49.52 | a | 62.47 | a | 68.55 | 74.33 | a | 74.78 | a | 59.48 | 49.81 | 41.81 | a | 19.91 | d | 46.12 | |||||||
1950 | 1.88 | a | 18.07 | 25.19 | b | 37.59 | c | 54.08 | 67.10 | 67.84 | 67.32 | 60.22 | a | 49.68 | 25.70 | 12.84 | 40.63 | |||||||||
1951 | 8.92 | 18.07 | a | 16.08 | a | 41.22 | 57.65 | 59.65 | 69.23 | 67.68 | 55.20 | 45.89 | 25.70 | 10.16 | o | 42.30 | a | |||||||||
1952 | ----- | z | 21.85 | l | 20.89 | h | 48.52 | b | 56.05 | b | 69.45 | 72.35 | a | 69.44 | 64.02 | b | 44.50 | 31.53 | 22.33 | d | 53.13 | c | ||||
1953 | 17.23 | c | 19.82 | 31.27 | a | 40.98 | 56.35 | a | 68.15 | 71.32 | 72.95 | 61.85 | 55.94 | 36.43 | a | 20.24 | 46.04 | |||||||||
1954 | 6.55 | 35.45 | 27.65 | 46.75 | 53.50 | 65.72 | 75.61 | 71.66 | 61.45 | 47.00 | 39.17 | d | 21.29 | 45.98 | ||||||||||||
1955 | 15.97 | 11.43 | 28.11 | 54.37 | 62.72 | b | 64.93 | 76.85 | a | 75.83 | a | 62.08 | 51.43 | b | 21.22 | 7.18 | a | 44.34 | ||||||||
1956 | 8.80 | a | 8.89 | b | 26.98 | 39.77 | 58.27 | a | 71.68 | 70.68 | 69.65 | 59.48 | 54.35 | a | 32.03 | 24.94 | 43.79 | |||||||||
1957 | 6.32 | a | 17.69 | b | 30.34 | 44.26 | a | 55.58 | 64.48 | 76.45 | 72.45 | 58.68 | 48.61 | 33.17 | a | 27.15 | a | 44.60 | ||||||||
1958 | 22.77 | 16.34 | 30.29 | 46.52 | 61.47 | b | 63.07 | 69.32 | 74.27 | 63.95 | b | 50.67 | b | ----- | z | ----- | z | 49.87 | b | |||||||
1959 | ----- | z | ----- | z | ----- | z | 51.44 | v | 56.17 | e | 70.43 | 71.97 | 73.89 | 59.48 | 43.06 | 24.10 | a | 28.26 | 53.42 | d | ||||||
1960 | 11.56 | 11.98 | a | 15.47 | 45.15 | 56.38 | b | 63.75 | d | 72.77 | 71.12 | a | 61.55 | a | 49.40 | 33.13 | ----- | z | 44.75 | a | ||||||
1961 | ----- | z | ----- | z | 38.64 | q | 39.61 | b | 53.87 | 67.85 | 68.85 | 72.19 | b | 56.43 | a | 47.47 | a | 29.74 | e | 14.07 | a | 50.01 | c | |||
1962 | 10.39 | 13.61 | 22.55 | 45.20 | 59.73 | 65.83 | 69.08 | 70.60 | 58.58 | 51.26 | 37.70 | 21.85 | 43.86 | |||||||||||||
1963 | 6.25 | a | 20.91 | a | 38.18 | 47.17 | 57.40 | a | 69.92 | 74.03 | 71.61 | 64.40 | 58.35 | 35.33 | 11.08 | 46.22 | ||||||||||
1964 | 20.85 | 26.40 | 25.31 | 48.58 | 60.61 | 69.00 | 77.23 | 69.42 | 60.22 | 48.29 | 29.55 | 10.81 | 45.52 | |||||||||||||
1965 | 6.69 | 14.55 | 21.05 | 45.37 | 58.77 | a | 66.50 | 73.66 | 71.53 | 51.67 | 52.42 | 32.27 | 27.58 | 43.50 | ||||||||||||
1966 | 3.02 | 12.82 | 36.48 | a | 40.43 | 55.89 | 68.10 | 78.35 | 67.98 | 60.18 | 47.90 | 27.98 | 20.15 | a | 43.27 | |||||||||||
1967 | 17.53 | a | 13.80 | 34.05 | 45.97 | a | 52.85 | 65.07 | 70.26 | 69.26 | 62.20 | 47.45 | 31.75 | b | 19.26 | 44.12 | ||||||||||
1968 | 13.43 | a | 17.71 | 38.84 | 45.95 | 52.90 | 67.92 | 71.74 | 70.92 | 61.03 | 49.55 | 33.15 | 13.15 | a | 44.69 | |||||||||||
1969 | 6.10 | 18.86 | 18.15 | 48.70 | 59.70 | a | 61.48 | 72.26 | 74.72 | b | 64.67 | a | 41.31 | d | 34.28 | 20.69 | 43.41 | |||||||||
1970 | 3.58 | 19.96 | 25.75 | a | 43.12 | 58.94 | 69.86 | a | 74.18 | a | 73.48 | 64.40 | 48.39 | 31.32 | 14.08 | 43.92 | ||||||||||
1971 | 5.95 | 15.89 | 31.19 | 48.50 | a | 55.31 | 71.45 | 70.71 | c | 74.82 | c | 60.88 | 51.05 | 31.87 | 14.78 | a | 44.37 | |||||||||
1972 | 6.95 | 9.97 | 29.32 | 44.55 | 59.52 | a | 66.75 | b | 69.97 | 72.05 | 63.76 | m | 42.33 | e | 30.80 | 10.71 | e | 40.26 | a | |||||||
1973 | 15.37 | 22.77 | 37.44 | 44.02 | c | 53.45 | b | 67.21 | d | 73.27 | g | 75.06 | e | 57.57 | 52.77 | a | 28.10 | a | 13.52 | d | 42.48 | a | ||||
1974 | 9.42 | a | 21.27 | d | 32.72 | m | 45.02 | a | 53.93 | b | 65.22 | 77.83 | a | 68.16 | b | 57.34 | a | 50.45 | 31.17 | a | 21.39 | 45.56 | a | |||
1975 | 13.29 | j | 14.64 | 23.37 | a | 37.32 | b | 58.81 | 66.73 | b | 76.19 | b | 71.59 | b | 57.60 | 49.76 | 32.10 | 19.96 | e | 46.19 | a | |||||
1976 | 10.48 | c | 29.52 | 29.55 | 49.53 | 55.03 | a | 70.40 | 75.27 | 75.50 | 61.00 | 41.58 | a | 26.03 | 14.12 | a | 44.84 | |||||||||
1977 | 2.17 | b | 23.38 | 31.58 | 51.12 | 65.92 | a | 68.48 | 75.19 | 66.30 | a | 61.23 | 46.00 | 27.50 | a | 11.88 | a | 44.23 | ||||||||
1978 | -2.95 | 6.14 | 25.52 | a | 43.93 | ----- | z | ----- | z | 71.15 | 71.73 | 66.97 | 46.28 | a | 26.52 | a | 13.30 | a | 36.86 | b | ||||||
1979 | -0.71 | 1.73 | 25.21 | 42.29 | a | 53.02 | a | 65.48 | 72.74 | 68.16 | b | 63.64 | a | 45.40 | b | 27.75 | h | 24.47 | 41.95 | a | ||||||
1980 | 12.26 | 13.83 | b | 25.45 | a | 47.86 | a | 58.53 | 65.70 | c | 73.02 | a | 69.68 | 59.83 | 45.24 | 35.17 | 19.47 | 43.84 | ||||||||
1981 | 18.53 | 23.84 | 35.45 | a | 49.55 | 55.03 | 66.40 | 73.86 | c | 71.06 | 61.93 | 46.45 | 38.22 | a | 15.21 | 46.30 | ||||||||||
1982 | -2.13 | h | 14.88 | d | 26.68 | i | 43.50 | f | 58.06 | e | 61.70 | c | 73.04 | d | 71.92 | e | 59.30 | e | 45.75 | g | 26.85 | f | 23.04 | h | 56.48 | f |
1983 | 21.24 | h | 26.78 | c | 32.11 | c | 41.31 | a | 52.90 | e | 64.95 | b | 75.45 | b | 77.45 | a | 61.39 | b | 47.04 | e | 33.50 | d | -0.08 | a | 46.62 | a |
1984 | 14.52 | e | 28.41 | f | 26.05 | 44.56 | c | 53.07 | b | 66.33 | d | 71.63 | 72.78 | a | 54.90 | 48.09 | b | 32.16 | e | 11.00 | f | 48.41 | b | |||
1985 | 6.07 | d | 13.42 | d | 33.77 | a | 49.80 | 61.68 | a | 62.53 | 71.98 | 64.66 | c | 56.68 | b | 45.58 | 18.43 | 6.87 | a | 40.96 | ||||||
1986 | 16.55 | c | 10.31 | b | 34.10 | b | 44.07 | a | 57.43 | a | 68.52 | 73.08 | 67.19 | d | 57.84 | b | 47.40 | 26.78 | 24.31 | 43.97 | ||||||
1987 | 22.03 | 31.84 | 33.65 | 51.00 | 62.19 | 70.65 | 75.94 | 68.90 | 61.60 | 43.63 | a | 36.35 | 24.81 | 48.55 | ||||||||||||
1988 | 8.63 | a | 13.79 | 34.16 | 45.28 | 63.13 | 75.53 | 75.85 | 73.10 | 60.10 | 44.26 | 30.17 | 19.83 | a | 45.32 | |||||||||||
1989 | 17.53 | 5.24 | a | 23.71 | 46.16 | a | 57.30 | a | 65.02 | 75.80 | a | 72.52 | 59.77 | 47.63 | 29.08 | ----- | z | 45.43 | a | |||||||
1990 | ----- | z | ----- | z | 35.25 | a | 43.07 | 54.27 | 66.75 | 69.98 | a | 69.74 | 63.03 | a | 45.22 | a | 34.07 | b | 12.72 | b | 49.41 | b | ||||
1991 | 10.19 | 27.82 | 32.37 | 47.25 | b | 59.48 | 71.25 | 72.42 | 72.29 | 59.45 | a | 44.79 | b | 24.52 | a | 23.87 | a | 45.48 | ||||||||
1992 | 23.10 | 28.21 | a | 37.02 | 42.38 | 58.87 | 63.62 | 63.94 | 64.47 | 58.64 | a | 46.94 | d | 29.05 | 14.48 | a | 44.23 | |||||||||
1993 | 9.27 | e | 11.24 | a | 29.85 | a | 42.95 | 55.72 | b | 62.02 | 67.38 | a | 68.41 | b | 53.58 | e | 44.54 | c | 27.29 | a | 17.62 | a | 40.82 | |||
1994 | -0.33 | a | 4.10 | d | 32.63 | 43.21 | b | 60.78 | b | 67.43 | a | 68.34 | ----- | z | 61.50 | b | 49.40 | a | 32.58 | d | 17.69 | 39.76 | a | |||
1995 | 11.92 | a | 18.61 | a | 28.68 | 38.67 | 54.02 | 67.45 | 72.37 | 73.29 | 58.47 | 45.26 | 27.10 | 19.68 | 42.96 | |||||||||||
1996 | 5.84 | 18.33 | 21.56 | 41.15 | 52.94 | 67.45 | a | ----- | z | 70.37 | d | 59.90 | d | 46.32 | 19.72 | 7.16 | 37.34 | a | ||||||||
1997 | 4.08 | 15.77 | 25.56 | 40.12 | 53.35 | 68.47 | 71.82 | 68.97 | a | 62.91 | a | 48.69 | 27.28 | 26.88 | c | 42.83 | ||||||||||
1998 | 13.55 | c | 28.69 | a | 25.11 | 47.33 | 60.23 | 63.17 | a | 72.41 | n | 71.60 | a | 66.35 | c | 48.34 | c | 34.19 | d | 25.07 | b | 43.97 | a | |||
1999 | 11.70 | c | 29.78 | a | 34.70 | a | 46.15 | d | 57.88 | b | 65.87 | c | 73.71 | c | 69.53 | a | 55.70 | e | 43.79 | j | 40.02 | i | 26.78 | h | 49.45 | c |
2000 | 17.69 | m | 34.36 | v | 41.39 | m | 40.78 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.77 | h | 9.67 | h | ----- | z |
2001 | 17.44 | g | 6.97 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.73 | b | 24.46 | c | 28.10 | j |
2003 | 15.80 | a | 13.79 | 30.69 | d | 47.48 | b | 55.62 | b | 65.98 | 73.73 | a | 73.82 | a | 60.22 | 50.76 | 26.45 | 24.37 | 44.89 | |||||||
2004 | 11.97 | b | 17.17 | b | 37.05 | b | 47.40 | d | 55.69 | 62.78 | a | 69.94 | 64.97 | b | 63.90 | 48.78 | b | 35.95 | a | 23.79 | 44.95 | |||||
2005 | 11.95 | 24.98 | 32.77 | a | 48.42 | 54.92 | 72.13 | 75.45 | j | 70.74 | 64.90 | 48.34 | 34.45 | 17.05 | b | 43.70 | a | |||||||||
2006 | 28.10 | 21.43 | 32.92 | 49.52 | 57.95 | 68.02 | 76.95 | 72.25 | a | 56.47 | 43.37 | 31.13 | 24.81 | 46.91 | ||||||||||||
2007 | 12.66 | 8.12 | 36.32 | 41.05 | 60.90 | 68.62 | 74.82 | 69.56 | d | 62.12 | a | 49.42 | 32.83 | 13.24 | 44.14 | |||||||||||
2008 | 9.87 | 12.71 | 29.29 | 41.40 | 53.73 | 64.85 | 72.58 | 70.74 | 60.75 | 46.40 | 33.22 | 10.31 | 42.15 | |||||||||||||
2009 | 9.05 | 17.80 | a | 26.94 | 42.38 | 56.45 | 64.53 | 67.40 | 67.02 | 62.60 | 40.16 | 38.10 | 11.78 | a | 42.02 | |||||||||||
2010 | 8.87 | 10.26 | a | 33.89 | 51.40 | 56.61 | 67.45 | 73.26 | 74.50 | 58.40 | 50.03 | 31.62 | 13.95 | 44.19 | ||||||||||||
2011 | 7.13 | 10.52 | 22.21 | 43.32 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.79 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 10.66 | 17.21 | 29.45 | 45.09 | 57.16 | 66.82 | 72.65 | 70.99 | 60.34 | 47.73 | 30.93 | 17.74 | 44.27 | |||||||||||||
S.D. | 6.41 | 7.36 | 5.60 | 3.75 | 3.15 | 3.00 | 3.01 | 2.89 | 3.07 | 3.47 | 4.72 | 6.32 | 1.67 | |||||||||||||
SKEW | 0.38 | 0.34 | -0.48 | 0.02 | 0.51 | 0.16 | -0.37 | -0.22 | -0.34 | 0.42 | -0.35 | -0.37 | -0.11 | |||||||||||||
MAX | 28.10 | 35.45 | 38.84 | 54.37 | 65.92 | 75.53 | 78.35 | 77.45 | 66.97 | 58.35 | 41.81 | 28.26 | 48.55 | |||||||||||||
MIN | -2.95 | 1.73 | 15.47 | 37.32 | 52.85 | 59.65 | 63.94 | 64.47 | 51.67 | 40.16 | 18.43 | -0.08 | 40.63 | |||||||||||||
YRS | 53 | 55 | 55 | 58 | 58 | 58 | 55 | 58 | 58 | 57 | 56 | 53 | 37 |