YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | 55.65 | 50.70 | 42.89 | 27.52 | 13.74 | 38.10 | g | |||||
1964 | 7.85 | 7.83 | 15.00 | a | 29.63 | 41.50 | 48.08 | 56.71 | 52.13 | 46.15 | 39.40 | 24.76 | a | 13.66 | 31.89 | |||||||||||
1965 | 15.45 | 11.80 | a | 16.55 | 32.32 | 40.37 | 47.25 | 55.10 | 51.65 | 43.85 | 39.77 | 27.22 | 17.52 | 33.24 | ||||||||||||
1966 | 6.44 | 9.32 | 23.19 | 33.28 | 43.60 | 49.08 | 58.16 | 54.73 | 48.38 | 37.81 | 28.18 | 12.68 | 33.74 | |||||||||||||
1967 | 13.08 | 14.68 | 27.32 | 34.10 | 40.16 | 48.08 | 55.90 | 51.90 | 47.10 | 38.11 | 26.75 | 13.02 | 34.18 | |||||||||||||
1968 | 11.90 | a | 17.62 | 21.60 | 28.18 | 39.68 | 50.10 | 54.94 | 51.34 | 44.37 | 37.77 | 21.12 | 14.02 | 32.72 | ||||||||||||
1969 | 18.24 | 12.57 | 16.45 | 35.13 | 45.27 | 46.97 | 55.97 | 56.56 | 48.60 | 29.65 | a | 20.67 | 17.39 | 33.62 | ||||||||||||
1970 | 11.03 | 19.46 | 18.38 | a | 25.73 | 41.11 | 47.98 | 54.44 | 55.32 | 44.62 | a | 31.62 | a | 26.02 | 14.69 | 32.53 | ||||||||||
1971 | 16.55 | 15.18 | 20.53 | a | 31.83 | a | 39.69 | 49.50 | 53.35 | 53.71 | 44.62 | 37.32 | a | 24.35 | 13.79 | 33.37 | ||||||||||
1972 | 12.68 | 16.71 | a | 28.74 | 33.78 | 41.56 | 50.67 | 54.68 | 52.88 | a | 46.22 | 40.13 | a | 19.67 | 10.38 | a | 34.01 | |||||||||
1973 | 9.58 | 14.62 | 22.31 | 27.00 | 40.69 | 48.63 | 53.28 | a | 53.16 | 45.40 | a | 37.76 | 29.36 | a | 14.40 | 33.02 | ||||||||||
1974 | 10.35 | 10.45 | 27.69 | 30.58 | 44.15 | 50.38 | 55.89 | 50.35 | 48.83 | 45.32 | a | 23.52 | 9.68 | 33.93 | ||||||||||||
1975 | 10.35 | a | 13.14 | 23.13 | 28.97 | 39.31 | 46.62 | 55.58 | 53.11 | i | 48.28 | 37.43 | a | 25.37 | 14.81 | 31.18 | a | |||||||||
1976 | 9.37 | 20.52 | 20.00 | 32.54 | b | 42.32 | a | 48.78 | 54.77 | 51.45 | 47.25 | 34.71 | ----- | z | ----- | z | 36.17 | b | ||||||||
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.95 | 48.80 | 39.13 | a | 26.21 | a | 17.62 | b | 37.34 | g | ||
1978 | 14.35 | 16.05 | 26.35 | 34.62 | 40.45 | 50.45 | 53.73 | 50.84 | 46.15 | 36.87 | 22.64 | a | 4.30 | a | 33.07 | |||||||||||
1979 | 4.76 | 10.63 | b | 20.29 | 29.91 | a | 40.11 | 48.40 | 52.55 | 51.76 | 47.79 | a | 37.26 | 13.36 | a | 13.27 | 30.84 | |||||||||
1980 | 14.58 | 15.31 | 19.02 | 26.13 | 39.37 | 49.72 | 54.35 | 53.06 | 47.45 | 33.60 | ----- | z | 20.10 | 33.88 | a | |||||||||||
1981 | 14.73 | a | 16.00 | 23.66 | 37.08 | 42.00 | 52.78 | a | 55.86 | b | 53.87 | a | 48.58 | 37.96 | c | 29.07 | 18.02 | b | 35.80 | |||||||
1982 | 13.30 | a | 14.25 | 23.48 | d | 31.41 | c | 40.07 | c | 47.88 | 54.13 | e | 56.08 | f | 46.87 | c | 35.41 | i | 22.92 | e | 17.74 | f | 32.70 | c | ||
1983 | 18.04 | g | 19.89 | e | 25.12 | b | 25.43 | h | 39.38 | c | 48.35 | g | 54.94 | g | 56.63 | a | 49.26 | e | 40.65 | g | 24.35 | c | 14.48 | j | 35.77 | f |
1984 | 5.32 | f | 12.42 | e | 20.10 | f | 27.66 | h | 43.33 | g | 48.77 | d | 55.71 | g | 53.29 | g | 48.68 | b | 31.92 | e | 26.10 | j | 18.24 | d | 32.01 | g |
1985 | 11.15 | g | 11.57 | f | 23.81 | e | 34.00 | h | 43.02 | d | 50.56 | d | 54.58 | g | 53.00 | g | 45.06 | f | 37.89 | l | 23.40 | j | 15.78 | f | 39.13 | i |
1986 | 19.18 | l | 15.08 | v | 23.64 | j | 36.45 | k | 41.55 | i | 50.50 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 11.92 | 14.42 | 22.13 | 31.24 | 41.19 | 49.03 | 54.97 | 53.26 | 47.18 | 37.32 | 24.37 | 14.28 | 33.28 | |||||||||||||
S.D. | 3.55 | 3.48 | 3.88 | 3.22 | 1.72 | 1.50 | 1.36 | 1.93 | 1.82 | 3.70 | 3.84 | 3.63 | 1.15 | |||||||||||||
SKEW | -0.25 | 0.00 | -0.10 | -0.13 | 0.91 | 0.54 | 0.37 | 0.33 | -0.22 | -0.14 | -1.18 | -0.89 | -0.02 | |||||||||||||
MAX | 18.24 | 20.52 | 28.74 | 37.08 | 45.27 | 52.78 | 58.16 | 56.63 | 50.70 | 45.32 | 29.36 | 20.10 | 35.80 | |||||||||||||
MIN | 4.76 | 7.83 | 15.00 | 25.73 | 39.31 | 46.62 | 52.55 | 50.35 | 43.85 | 29.65 | 13.36 | 4.30 | 30.84 | |||||||||||||
YRS | 18 | 20 | 20 | 18 | 20 | 20 | 18 | 19 | 22 | 20 | 19 | 19 | 14 |