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 | 51.57 | c | 52.03 | 43.47 | 38.10 | 27.20 | 7.97 | 36.72 | f | |||||
1963 | -5.58 | -3.61 | 20.19 | 33.73 | 41.77 | 52.93 | 55.97 | 51.29 | 47.33 | 44.32 | 29.00 | 0.13 | 30.62 | |||||||||||||
1964 | 9.29 | 8.10 | 15.61 | 32.77 | 45.61 | 50.50 | 55.70 | a | 51.77 | 46.97 | 35.45 | 26.40 | 3.32 | 31.79 | ||||||||||||
1965 | -1.52 | -1.11 | 9.16 | 29.61 | b | 46.48 | 48.90 | 51.52 | 51.74 | 42.33 | 36.19 | 22.93 | 18.06 | 29.53 | ||||||||||||
1966 | -8.63 | a | 5.93 | 21.23 | 29.40 | 33.90 | 50.23 | 56.35 | 51.58 | 42.23 | 32.81 | 21.53 | 8.65 | 28.77 | ||||||||||||
1967 | 5.81 | -2.82 | 17.55 | 32.13 | 35.29 | 52.60 | 53.13 | 49.10 | 43.43 | 41.45 | t | 21.26 | g | 11.13 | a | 29.73 | b | |||||||||
1968 | 2.48 | 1.93 | b | 24.71 | 33.87 | 40.45 | 54.47 | m | ----- | z | ----- | z | 35.60 | y | 38.84 | 23.70 | 6.13 | 21.51 | d | |||||||
1969 | -1.23 | 2.50 | 5.94 | 32.76 | a | 40.21 | b | 42.97 | a | 51.97 | 50.57 | a | 40.30 | 33.03 | 20.37 | 9.58 | 27.41 | |||||||||
1970 | -7.87 | -4.71 | 6.42 | 30.93 | 43.03 | a | 51.20 | 53.26 | 48.00 | 43.90 | 38.71 | 23.07 | 8.87 | 27.90 | ||||||||||||
1971 | -9.00 | 1.26 | a | 9.19 | 26.63 | 34.07 | a | 52.67 | 49.19 | 47.10 | 46.07 | 43.00 | 23.70 | 6.71 | 27.55 | |||||||||||
1972 | -12.39 | -6.03 | 8.84 | 25.73 | 42.58 | 43.40 | 51.00 | 53.32 | 42.33 | 32.32 | 25.33 | 2.87 | 25.78 | |||||||||||||
1973 | 2.55 | 7.18 | 28.87 | 30.77 | 38.97 | 51.03 | 52.81 | 55.06 | 43.67 | 38.71 | 23.27 | 6.19 | 31.59 | |||||||||||||
1974 | -0.16 | 1.61 | 18.26 | 31.63 | 39.35 | 43.67 | 53.81 | 49.06 | 36.53 | 32.97 | 24.00 | a | 13.74 | 28.71 | ||||||||||||
1975 | 2.61 | 5.79 | 7.87 | 24.47 | 43.84 | 50.83 | 52.89 | c | 49.10 | 40.07 | 33.93 | b | 24.50 | 8.16 | 28.67 | |||||||||||
1976 | -3.77 | 11.69 | 14.47 | a | 29.03 | a | 34.74 | 46.57 | 46.81 | 45.19 | 37.08 | e | 22.97 | 6.81 | c | -9.65 | 23.50 | |||||||||
1977 | -15.29 | 2.14 | 22.47 | a | 33.28 | a | 44.16 | 45.36 | b | 52.66 | b | 42.10 | a | 43.80 | 28.97 | 18.43 | 1.16 | 26.60 | ||||||||
1978 | -9.26 | -12.93 | 5.39 | 25.93 | 39.74 | 46.57 | b | 52.61 | 51.13 | 45.90 | 31.55 | 14.20 | -4.42 | 23.87 | ||||||||||||
1979 | -15.68 | -10.29 | 15.39 | c | 24.93 | 34.32 | 47.27 | 54.19 | 50.84 | 44.43 | 31.77 | 19.87 | 10.71 | 25.65 | ||||||||||||
1980 | -3.13 | -0.76 | 9.19 | 29.33 | 38.41 | b | 45.77 | 50.94 | 54.58 | 43.90 | 29.84 | 21.70 | 5.10 | 27.07 | ||||||||||||
1981 | 0.52 | 9.46 | 18.97 | 32.57 | 37.26 | 51.57 | 53.71 | 54.81 | 40.50 | 32.39 | 23.63 | 5.71 | 30.09 | |||||||||||||
1982 | -12.27 | a | 1.93 | 16.00 | 27.23 | 47.45 | 44.03 | 55.74 | 51.19 | 46.13 | 37.48 | 22.28 | a | 15.33 | a | 29.38 | ||||||||||
1983 | 7.94 | 20.22 | a | 23.61 | 28.27 | 37.03 | 51.00 | 59.03 | 57.32 | 47.97 | 35.52 | 25.03 | a | -6.34 | b | 32.22 | ||||||||||
1984 | -1.37 | a | 18.21 | 12.13 | 32.79 | a | 37.61 | 54.00 | 52.00 | 56.74 | 42.73 | 40.58 | 22.70 | 6.90 | 31.25 | |||||||||||
1985 | -1.97 | 4.71 | 22.94 | 37.10 | 46.26 | 46.50 | 52.10 | 52.23 | a | 47.37 | 34.94 | 16.59 | a | -5.68 | 29.42 | |||||||||||
1986 | 3.55 | 3.22 | a | 20.93 | a | 36.77 | 44.32 | 49.87 | 58.42 | 50.29 | 47.44 | c | 36.16 | 18.53 | 13.70 | a | 31.93 | |||||||||
1987 | 8.45 | 15.75 | 24.55 | 33.25 | b | 44.60 | a | 51.39 | b | 59.35 | 54.06 | 45.87 | 29.74 | 26.73 | 17.10 | 34.24 | ||||||||||
1988 | -1.32 | -1.14 | 18.90 | 30.37 | 43.87 | a | 49.83 | 56.77 | 57.50 | a | 44.03 | a | 28.65 | 25.67 | 6.30 | a | 29.95 | |||||||||
1989 | 8.26 | -5.43 | 13.13 | 29.00 | a | 39.70 | a | 48.24 | a | 56.65 | 54.58 | 43.52 | a | 34.90 | 16.74 | c | -3.60 | a | 27.97 | |||||||
1990 | 13.35 | 5.11 | a | 21.65 | 33.70 | 39.39 | 51.50 | d | ----- | z | ----- | z | 48.80 | 34.61 | 26.23 | 5.23 | 27.96 | b | ||||||||
1991 | -0.84 | 8.46 | 20.26 | 35.73 | 48.97 | 55.90 | a | 56.10 | 54.50 | c | 44.21 | b | 32.23 | 16.63 | 10.65 | 31.90 | ||||||||||
1992 | 9.48 | 16.83 | 19.74 | 31.30 | 43.26 | 47.83 | a | 50.16 | 49.32 | 45.43 | 33.42 | 24.43 | 11.45 | 31.89 | ||||||||||||
1993 | 3.32 | 6.07 | 16.13 | 30.20 | 42.30 | a | 50.33 | 57.29 | 55.68 | 39.67 | 32.50 | a | 20.43 | 12.71 | 30.55 | |||||||||||
1994 | -10.84 | 0.67 | a | 21.77 | a | 31.33 | 41.81 | 53.00 | 54.74 | 52.06 | 49.43 | 40.20 | a | 25.82 | b | 15.00 | c | 31.25 | ||||||||
1995 | 6.27 | a | 5.39 | 20.94 | 27.00 | 40.32 | 54.03 | 56.10 | 60.26 | 44.17 | 37.03 | 14.36 | b | 5.10 | 30.91 | |||||||||||
1996 | -5.68 | 3.79 | 10.61 | 26.29 | b | 39.52 | b | 53.57 | 53.52 | d | 54.17 | a | 47.33 | 36.73 | p | 14.40 | e | 8.74 | 27.84 | a | ||||||
1997 | 0.06 | 10.25 | 17.40 | a | 28.63 | 35.68 | 52.43 | 56.52 | 51.71 | 47.62 | a | 38.03 | 21.60 | 17.90 | a | 31.49 | ||||||||||
1998 | 10.61 | 22.43 | 21.10 | a | 34.87 | 46.03 | 50.97 | a | 54.67 | a | 55.13 | a | 47.53 | 38.50 | a | 28.13 | 12.23 | 35.18 | ||||||||
1999 | -1.36 | c | 13.70 | a | 19.58 | e | 34.14 | a | 44.96 | c | 52.44 | u | 63.67 | y | 52.10 | j | 45.38 | a | 33.93 | b | 26.79 | a | 11.33 | a | 25.38 | c |
2000 | 1.34 | b | 13.59 | 26.81 | 29.77 | 44.35 | 50.21 | b | 55.45 | 54.17 | b | 44.60 | 38.30 | a | 23.93 | -3.86 | c | 31.56 | ||||||||
2001 | 8.00 | a | 1.15 | a | 16.55 | 36.59 | a | 44.48 | 52.60 | 53.55 | 55.40 | f | 45.10 | a | 34.57 | a | 33.03 | 16.79 | b | 31.13 | a | |||||
2002 | 17.76 | f | 16.67 | a | 12.42 | 32.17 | a | 38.23 | 54.86 | a | 59.50 | a | 54.65 | 48.41 | c | 32.13 | a | 22.28 | a | 15.63 | a | 35.18 | a | |||
2003 | 2.00 | -0.07 | 17.04 | c | ----- | z | ----- | z | 48.93 | 54.20 | a | 55.13 | 46.29 | b | 35.28 | b | 22.97 | a | 16.17 | b | 29.79 | b | ||||
2004 | -1.39 | 10.14 | 21.83 | a | 31.47 | 41.53 | a | 49.20 | 52.87 | 48.38 | b | 50.20 | 36.31 | b | 25.90 | a | 8.87 | 31.28 | ||||||||
2005 | 4.19 | 11.59 | a | 11.90 | a | 34.76 | a | 41.68 | 56.32 | b | 57.83 | b | 53.73 | a | 48.90 | 37.39 | 24.67 | 10.90 | 32.82 | |||||||
2006 | 18.20 | a | 5.50 | 20.03 | a | 36.11 | b | 44.81 | 48.59 | a | 57.32 | 53.52 | 41.97 | 30.90 | 26.33 | 19.23 | a | 33.54 | ||||||||
2007 | 9.06 | -1.52 | a | 23.11 | c | 31.10 | 45.17 | b | 52.69 | a | 55.30 | a | 54.07 | a | 49.00 | a | 42.10 | b | 22.63 | 5.90 | 32.39 | |||||
2008 | 3.37 | a | -0.59 | 12.94 | 32.63 | 38.71 | 50.43 | 54.97 | 50.81 | 48.75 | b | 35.40 | a | 23.67 | 1.16 | 29.35 | ||||||||||
2009 | -9.17 | a | 7.46 | b | 19.55 | 30.28 | a | 42.23 | a | 48.57 | 49.84 | 51.57 | a | 46.63 | 33.79 | c | 29.77 | 9.21 | b | 29.98 | ||||||
2010 | 4.37 | a | 6.61 | 24.61 | 37.17 | 43.13 | 53.45 | a | 59.03 | a | 57.63 | a | 44.10 | 34.55 | b | 24.10 | a | 8.47 | a | 33.10 | ||||||
2011 | 0.63 | a | 6.54 | 15.13 | 30.79 | a | 43.10 | 51.43 | 60.80 | a | 54.65 | 45.50 | 38.68 | 27.57 | 15.35 | 32.51 | ||||||||||
2012 | 8.07 | a | 15.17 | 35.68 | 32.20 | 46.13 | 53.63 | 59.35 | 50.43 | a | 40.47 | 33.00 | 24.70 | 14.55 | 34.45 | |||||||||||
2013 | 5.06 | 5.26 | a | 11.61 | 27.73 | 42.29 | 52.17 | 56.90 | 53.90 | 46.97 | 36.94 | 21.20 | 0.00 | 30.00 | ||||||||||||
2014 | -7.58 | -6.71 | 11.19 | 28.73 | 43.80 | a | 55.24 | a | 54.55 | 55.13 | 44.43 | 35.40 | a | 15.50 | 15.00 | 28.72 | ||||||||||
2015 | 4.58 | -6.14 | 20.35 | 32.07 | 43.90 | 50.40 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.95 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.31 | 4.72 | 17.39 | 31.17 | 41.55 | 50.34 | 54.61 | 52.51 | 44.81 | 35.08 | 22.71 | 8.07 | 30.10 | |||||||||||||
S.D. | 7.51 | 7.76 | 6.24 | 3.23 | 3.72 | 3.28 | 3.00 | 3.33 | 3.07 | 3.89 | 4.63 | 6.90 | 2.66 | |||||||||||||
SKEW | -0.18 | 0.13 | 0.14 | -0.09 | -0.39 | -0.48 | -0.12 | -0.54 | -0.60 | -0.20 | -0.91 | -0.61 | -0.49 | |||||||||||||
MAX | 18.20 | 22.43 | 35.68 | 37.17 | 48.97 | 56.32 | 60.80 | 60.26 | 50.20 | 44.32 | 33.03 | 19.23 | 35.18 | |||||||||||||
MIN | -15.68 | -12.93 | 5.39 | 24.47 | 33.90 | 42.97 | 46.81 | 42.10 | 36.53 | 22.97 | 6.81 | -9.65 | 23.50 | |||||||||||||
YRS | 52 | 53 | 53 | 52 | 52 | 50 | 50 | 49 | 52 | 51 | 52 | 53 | 44 |