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 | 64.57 | c | 65.26 | 55.42 | 48.84 | 34.07 | 17.19 | 47.56 | f | |||||
1963 | 3.11 | 9.38 | 31.08 | 46.57 | 53.55 | 66.25 | 69.55 | 64.55 | 59.55 | 56.98 | 37.92 | 9.92 | 42.37 | |||||||||||||
1964 | 19.40 | 20.33 | 26.34 | 44.83 | 59.31 | 63.97 | 70.87 | a | 64.74 | 56.77 | 46.00 | 35.60 | 13.58 | 43.48 | ||||||||||||
1965 | 9.17 | a | 11.56 | a | 19.97 | 39.41 | b | 58.81 | 62.09 | a | 64.65 | 64.19 | 52.63 | 48.00 | 31.40 | 25.18 | 40.59 | |||||||||
1966 | 3.86 | b | 17.52 | 32.02 | 39.92 | 48.89 | 64.10 | 70.53 | 63.37 | 55.65 | 44.92 | 29.28 | a | 17.31 | 40.61 | |||||||||||
1967 | 15.56 | 9.66 | 28.31 | 42.87 | 49.26 | 63.97 | 65.52 | 62.48 | 57.20 | 51.23 | t | 28.59 | g | 21.21 | b | 41.60 | b | |||||||||
1968 | 12.69 | 13.67 | b | 37.03 | 46.53 | 52.16 | 65.68 | m | ----- | z | ----- | z | 50.80 | y | 48.74 | 31.80 | 16.69 | 32.42 | d | |||||||
1969 | 9.81 | 15.82 | 20.32 | 44.91 | b | 54.38 | b | 54.90 | a | 65.12 | a | 66.12 | b | 55.57 | 43.00 | 30.37 | 18.55 | 39.90 | ||||||||
1970 | 4.26 | 11.41 | 21.08 | 43.23 | 56.09 | b | 64.68 | 67.92 | a | 63.76 | 56.13 | 48.50 | 30.45 | 17.92 | 40.45 | |||||||||||
1971 | 3.66 | 13.63 | a | 22.06 | 41.03 | 49.66 | b | 66.22 | 63.15 | 61.79 | 58.43 | 52.69 | 31.73 | 16.95 | 40.08 | |||||||||||
1972 | 2.79 | 8.19 | 21.76 | 38.02 | 57.98 | a | 59.85 | 64.44 | 65.23 | 54.71 | a | 42.94 | 30.95 | 12.26 | 38.26 | |||||||||||
1973 | 14.31 | 17.96 | 38.02 | 41.55 | 50.92 | 63.77 | 66.71 | 67.94 | 55.92 | 51.40 | 31.63 | 15.71 | 42.99 | |||||||||||||
1974 | 10.71 | 15.00 | 28.10 | 44.13 | 51.87 | 58.48 | 68.63 | 63.32 | 51.07 | 45.85 | 32.90 | a | 22.52 | 41.05 | ||||||||||||
1975 | 13.40 | 16.79 | 20.94 | 36.37 | 58.19 | 62.80 | 66.96 | c | 63.87 | 52.72 | 48.21 | b | 35.43 | 16.66 | 41.03 | |||||||||||
1976 | 8.82 | 22.90 | 25.90 | a | 44.17 | a | 51.13 | a | 63.38 | 65.61 | 63.69 | 55.20 | e | 38.48 | 20.65 | c | 4.35 | 38.69 | ||||||||
1977 | -1.87 | 15.93 | 33.83 | a | 48.31 | a | 61.16 | 60.05 | b | 67.14 | b | 58.23 | a | 55.75 | 43.53 | 29.10 | 12.39 | 40.30 | ||||||||
1978 | 4.60 | 4.84 | 22.44 | 40.17 | 55.58 | 61.12 | b | 64.69 | 64.81 | 60.07 | 43.55 | 26.63 | 9.03 | 38.13 | ||||||||||||
1979 | -1.60 | 5.34 | 26.55 | c | 37.73 | 48.95 | 60.80 | 66.84 | 62.82 | 57.55 | 41.97 | 28.40 | 20.90 | 38.02 | ||||||||||||
1980 | 8.52 | 11.45 | 21.85 | 43.23 | 55.71 | b | 60.26 | a | 66.02 | 65.24 | 55.37 | 40.19 | 30.85 | 15.48 | a | 39.51 | ||||||||||
1981 | 12.65 | 19.38 | 30.60 | 44.43 | 51.87 | 62.85 | 66.26 | 65.73 | 53.28 | 42.58 | 34.27 | 14.98 | 41.57 | |||||||||||||
1982 | 0.60 | a | 13.26 | a | 25.06 | 38.18 | 59.42 | 57.36 | a | 67.72 | a | 63.39 | c | 56.13 | 48.55 | b | 29.76 | a | 22.65 | a | 40.17 | |||||
1983 | 16.85 | 26.19 | a | 31.60 | b | 38.80 | 49.21 | 63.43 | 70.98 | 68.95 | i | 58.78 | 45.98 | a | 31.98 | b | 4.00 | c | 39.80 | a | ||||||
1984 | 9.66 | b | 26.81 | 23.05 | 44.95 | b | 51.08 | 64.88 | 65.31 | 68.97 | a | 54.86 | a | 49.35 | a | 31.32 | 16.76 | 42.25 | ||||||||
1985 | 8.31 | 14.38 | 33.07 | a | 48.50 | a | 58.88 | b | 59.83 | 65.45 | 63.08 | a | 56.88 | 46.26 | b | 23.70 | b | 4.47 | 40.23 | |||||||
1986 | 13.63 | a | 13.13 | a | 30.55 | b | 47.95 | a | 57.55 | 62.95 | a | 69.45 | c | 62.20 | a | 57.06 | c | 45.21 | b | 26.60 | a | 21.02 | a | 42.27 | ||
1987 | 17.85 | 26.29 | 35.47 | 48.29 | f | 58.73 | a | 65.23 | b | 70.84 | 64.60 | 57.82 | b | 39.50 | c | 34.73 | 23.82 | 44.99 | a | |||||||
1988 | 8.76 | 10.41 | 28.79 | 43.79 | b | 59.73 | a | 65.41 | a | 71.23 | 69.43 | b | 56.48 | b | 39.98 | 32.70 | 16.08 | a | 41.90 | |||||||
1989 | 18.83 | a | 7.09 | 23.40 | a | 40.22 | a | 53.52 | b | 61.43 | b | 69.02 | 66.13 | 56.36 | a | 47.95 | b | 25.59 | c | 6.32 | a | 39.65 | ||||
1990 | 22.89 | 17.76 | a | 32.56 | 45.27 | 52.11 | 63.28 | e | ----- | z | ----- | z | 58.95 | 45.50 | 36.07 | 14.94 | 38.93 | b | ||||||||
1991 | 8.94 | 20.14 | 31.35 | 47.50 | 59.11 | 67.72 | a | 66.56 | 66.17 | d | 54.62 | b | 43.42 | 24.52 | 20.22 | b | 42.52 | |||||||||
1992 | 17.81 | 24.29 | 29.05 | a | 40.28 | 56.48 | 60.24 | a | 61.68 | 61.55 | 56.23 | 43.97 | a | 29.63 | 19.16 | 41.70 | ||||||||||
1993 | 13.15 | 15.89 | 28.06 | 40.65 | 53.97 | a | 60.43 | 67.16 | 66.79 | 50.72 | 43.43 | b | 27.80 | 19.71 | 40.65 | |||||||||||
1994 | 1.08 | a | 11.37 | a | 31.40 | a | 43.10 | 55.76 | 65.50 | a | 65.21 | 63.19 | 59.93 | 49.25 | a | 34.61 | c | 23.32 | c | 41.98 | ||||||
1995 | 14.45 | a | 14.98 | 31.24 | 37.07 | 52.89 | 66.95 | 67.37 | a | 69.94 | 55.60 | 45.79 | 21.73 | d | 13.81 | 40.98 | ||||||||||
1996 | 6.84 | 13.95 | 20.55 | a | 37.55 | b | 51.98 | b | 63.76 | a | 63.74 | d | 66.33 | b | 57.48 | 49.73 | p | 21.90 | e | 15.40 | 38.14 | a | ||||
1997 | 9.17 | a | 19.30 | 26.72 | a | 40.78 | 48.48 | 64.43 | 66.63 | 62.42 | 57.83 | a | 46.97 | a | 28.15 | 24.40 | a | 41.27 | ||||||||
1998 | 17.84 | 30.28 | a | 29.36 | b | 47.87 | 60.47 | a | 61.43 | a | 66.73 | a | 67.07 | a | 61.48 | a | 48.12 | b | 35.22 | 22.32 | 45.68 | |||||
1999 | 8.66 | c | 24.19 | a | 30.87 | e | 45.95 | a | 56.80 | c | 62.17 | x | 73.67 | y | 63.17 | k | 55.73 | b | 45.19 | d | 37.03 | a | 20.31 | b | 36.08 | c |
2000 | 11.38 | c | 23.72 | 37.42 | 41.87 | 56.10 | 61.41 | c | 65.98 | a | 65.44 | d | 55.77 | 49.15 | a | 30.22 | 5.73 | c | 42.02 | |||||||
2001 | 17.27 | a | 11.38 | d | 26.55 | 46.31 | a | 54.86 | b | 63.68 | b | 66.60 | a | 66.48 | f | 55.93 | a | 44.83 | a | 41.80 | 24.05 | b | 41.21 | a | ||
2002 | 24.80 | h | 25.90 | b | 21.87 | 41.76 | a | 49.55 | 65.00 | a | 70.38 | a | 65.32 | 58.61 | c | 39.45 | a | 29.80 | b | 23.07 | a | 44.61 | a | |||
2003 | 11.35 | a | 11.00 | 27.30 | d | ----- | z | ----- | z | 61.35 | 65.73 | a | 67.77 | a | 58.11 | b | 46.47 | b | 30.22 | a | 24.10 | b | 40.34 | b | ||
2004 | 7.84 | 19.88 | 30.70 | a | 43.97 | a | 52.52 | a | 60.42 | 65.08 | 60.05 | b | 62.58 | 46.65 | d | 34.04 | c | 18.84 | b | 41.88 | ||||||
2005 | 12.44 | 21.17 | a | 23.53 | b | 46.95 | a | 52.02 | 67.42 | d | 70.20 | c | 65.90 | a | 61.85 | 48.12 | a | 33.00 | 17.24 | 43.32 | ||||||
2006 | 25.10 | a | 15.73 | 30.08 | a | 49.07 | c | 56.22 | a | 62.64 | a | 71.50 | 65.18 | a | 53.67 | 41.08 | 34.78 | a | 25.98 | a | 44.25 | |||||
2007 | 17.03 | 8.17 | a | 33.23 | c | 42.48 | 57.55 | b | 65.80 | b | 67.58 | a | 65.42 | a | 59.48 | a | 51.21 | b | 30.27 | 14.53 | a | 42.73 | ||||
2008 | 13.81 | b | 11.24 | 23.87 | 42.68 | 51.27 | 61.45 | 66.89 | 64.19 | 58.89 | c | 45.58 | a | 31.45 | 11.57 | a | 40.24 | |||||||||
2009 | 3.12 | a | 18.00 | b | 29.92 | 41.67 | a | 54.95 | c | 60.37 | 61.44 | 62.83 | a | 59.55 | 40.82 | c | 38.52 | a | 16.28 | b | 40.62 | |||||
2010 | 13.55 | a | 18.00 | 37.60 | 50.10 | 56.00 | 63.02 | b | 69.38 | b | 69.12 | c | 54.92 | 47.12 | b | 32.60 | a | 15.98 | b | 43.95 | ||||||
2011 | 9.15 | a | 16.66 | 26.27 | 40.79 | a | 54.20 | a | 63.45 | 71.58 | a | 65.82 | 55.72 | 49.26 | 35.62 | 22.89 | 42.62 | |||||||||
2012 | 18.02 | a | 23.91 | a | 44.92 | 44.72 | 58.42 | a | 65.48 | 71.92 | 64.92 | a | 55.73 | 43.37 | 33.10 | 21.87 | 45.53 | |||||||||
2013 | 14.02 | 15.06 | a | 22.18 | 36.48 | 54.19 | 62.42 | 67.81 | 66.42 | 59.23 | 45.68 | 28.93 | 9.56 | 40.16 | ||||||||||||
2014 | 3.19 | 4.73 | 21.39 | 38.42 | 55.30 | a | 65.53 | a | 64.73 | 65.52 | 56.25 | 44.97 | a | 22.75 | 20.71 | 38.62 | ||||||||||
2015 | 13.05 | 4.84 | 31.34 | 44.65 | 55.90 | 61.87 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.96 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 10.76 | 15.85 | 28.27 | 42.90 | 54.63 | 62.87 | 67.14 | 64.84 | 56.70 | 45.78 | 31.03 | 16.98 | 41.29 | |||||||||||||
S.D. | 6.13 | 6.27 | 5.50 | 3.58 | 3.46 | 2.62 | 2.58 | 2.32 | 2.49 | 3.65 | 4.44 | 5.71 | 1.83 | |||||||||||||
SKEW | -0.05 | 0.20 | 0.50 | 0.00 | -0.06 | -0.51 | 0.09 | -0.13 | 0.03 | 0.30 | -0.32 | -0.64 | 0.35 | |||||||||||||
MAX | 25.10 | 30.28 | 44.92 | 50.10 | 61.16 | 67.72 | 71.92 | 69.94 | 62.58 | 56.98 | 41.80 | 25.98 | 45.68 | |||||||||||||
MIN | -1.87 | 4.73 | 19.97 | 36.37 | 48.48 | 54.90 | 61.44 | 58.23 | 50.72 | 38.48 | 20.65 | 4.00 | 38.02 | |||||||||||||
YRS | 52 | 53 | 53 | 51 | 52 | 50 | 50 | 48 | 52 | 51 | 52 | 53 | 42 |