| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1915 | 7.05 | 14.29 | 2.31 | 1.70 | 5.87 | 0.00 | 0.00 | 0.00 | 0.05 | 0.00 | 2.19 | 7.54 | 41.00 | |||||||||||||
| 1916 | 18.41 | 7.03 | 6.84 | 0.37 | 0.70 | 0.00 | 0.20 | 0.02 | 0.36 | 1.48 | 2.79 | 7.09 | 45.29 | |||||||||||||
| 1917 | 2.45 | 10.08 | 2.48 | 2.04 | 0.20 | 0.00 | 0.00 | z | 0.00 | z | 0.00 | 0.00 | 2.65 | 0.68 | 20.58 | |||||||||||
| 1918 | 1.45 | 11.30 | 10.92 | 1.86 | 0.46 | 0.00 | 0.00 | 0.00 | 4.19 | 1.93 | 3.61 | 1.80 | 37.52 | |||||||||||||
| 1919 | 3.36 | 15.56 | 5.53 | 0.59 | 0.00 | 0.00 | 0.00 | 0.00 | 1.34 | 0.43 | 0.79 | 7.96 | 35.56 | |||||||||||||
| 1920 | 1.25 | 2.53 | 11.72 | 3.60 | 0.13 | 0.55 | 0.00 | 0.00 | 0.22 | 5.89 | 6.93 | 9.85 | 42.67 | |||||||||||||
| 1921 | 10.86 | 3.68 | 5.03 | 0.55 | 3.07 | 0.05 | 0.00 | 0.00 | 0.10 | 0.88 | 2.08 | 9.30 | 35.60 | |||||||||||||
| 1922 | 4.58 | 14.29 | 8.13 | 1.20 | 3.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.77 | 9.55 | 15.61 | 59.13 | |||||||||||||
| 1923 | 7.70 | 2.45 | 0.23 | 7.37 | 0.73 | 0.13 | 0.00 | 0.00 | 2.07 | 2.11 | 0.51 | 4.27 | 27.57 | |||||||||||||
| 1924 | 3.00 | 3.28 | 3.99 | 0.80 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 6.11 | 2.89 | 7.97 | 28.14 | |||||||||||||
| 1925 | 2.06 | 13.30 | 3.63 | 5.27 | 2.41 | 0.43 | 0.10 | 0.00 | 1.54 | 1.11 | 2.88 | 2.84 | 35.57 | |||||||||||||
| 1926 | 3.89 | 10.46 | 0.11 | 5.55 | 1.28 | 0.00 | 0.00 | 0.00 | 0.04 | 2.68 | 11.56 | 2.37 | 37.94 | |||||||||||||
| 1927 | 6.76 | 10.98 | 4.31 | 5.28 | 1.57 | 0.63 | 0.00 | 0.00 | 0.00 | 2.63 | 5.65 | 5.71 | 43.52 | |||||||||||||
| 1928 | 2.67 | 3.08 | 13.16 | 2.81 | 0.00 | 0.00 | 0.10 | 0.00 | 0.00 | 0.02 | 3.20 | 4.10 | 29.14 | |||||||||||||
| 1929 | 3.15 | 4.60 | 4.17 | 2.70 | 0.15 | 3.05 | 0.00 | 0.00 | 0.00 | 0.38 | 0.00 | 7.77 | 25.97 | |||||||||||||
| 1930 | 7.63 | 4.21 | 5.79 | 2.49 | 0.28 | 0.00 | 0.00 | 0.00 | 0.10 | 0.35 | 4.54 | 0.53 | 25.92 | |||||||||||||
| 1931 | 6.00 | 4.28 | 3.24 | 1.46 | 1.03 | 1.87 | 0.00 | 0.00 | 0.00 | 2.70 | 5.62 | 13.83 | 40.03 | |||||||||||||
| 1932 | 6.20 | 5.72 | 1.38 | 3.37 | 1.68 | 0.07 | 0.04 | 0.00 | 0.00 | 0.00 | 1.66 | 4.18 | 24.30 | |||||||||||||
| 1933 | 7.39 | 1.74 | 5.57 | 0.40 | 3.80 | 0.33 | 0.00 | 0.00 | 0.39 | 4.61 | 0.00 | 14.15 | 38.38 | |||||||||||||
| 1934 | 2.75 | 6.68 | 0.59 | 1.50 | 1.48 | 1.56 | 0.00 | 0.00 | 1.06 | 3.77 | 6.58 | 4.02 | 29.99 | |||||||||||||
| 1935 | 8.80 | 2.63 | 6.12 | 10.08 | 0.85 | 0.00 | 0.00 | 0.00 | 0.00 | 3.78 | 2.48 | 3.46 | 38.20 | |||||||||||||
| 1936 | 12.03 | 19.31 | 3.54 | 2.68 | 1.00 | 2.47 | 0.07 | 0.00 | 1.74 | 0.64 | 0.00 | 5.79 | 49.27 | |||||||||||||
| 1937 | 7.84 | 13.25 | 10.12 | 2.97 | 0.15 | 1.01 | 0.00 | 0.00 | 0.00 | 1.85 | 4.91 | 7.72 | 49.82 | |||||||||||||
| 1938 | 5.75 | 14.90 | 12.33 | 2.93 | 1.21 | 0.59 | 0.06 | 0.00 | 0.37 | 2.95 | 1.90 | 1.69 | 44.68 | |||||||||||||
| 1939 | 5.01 | 4.18 | 4.97 | 0.35 | 2.62 | 0.22 | 0.00 | 0.00 | 1.63 | 2.65 | 0.93 | 3.41 | 25.97 | |||||||||||||
| 1940 | 16.75 | 14.70 | 9.13 | 1.13 | 0.73 | 0.02 | 0.00 | 0.00 | 0.03 | 1.45 | 1.68 | 11.84 | 57.46 | |||||||||||||
| 1941 | 8.11 | 8.22 | 4.21 | 5.61 | 1.96 | 0.02 | 0.00 | 0.00 | 0.35 | 1.06 | 3.77 | 12.13 | 45.44 | |||||||||||||
| 1942 | 10.54 | 7.32 | 2.59 | 6.71 | 5.20 | 0.00 | 0.00 | 0.00 | 0.05 | 0.57 | 9.93 | 5.99 | 48.90 | |||||||||||||
| 1943 | 13.19 | 3.60 | 12.26 | 3.41 | 1.35 | 0.70 | 0.00 | 0.00 | 0.00 | 0.87 | 0.00 | z | 3.37 | 38.75 | ||||||||||||
| 1944 | 6.17 | 8.33 | 3.93 | 4.50 | 1.20 | 0.66 | 0.00 | 0.00 | 0.33 | 2.45 | 9.55 | 4.13 | 41.25 | |||||||||||||
| 1945 | 1.55 | 12.17 | 7.10 | 1.35 | 1.98 | 0.70 | 0.00 | 0.00 | 0.08 | 6.25 | 7.57 | 12.36 | 51.11 | |||||||||||||
| 1946 | 1.69 | 3.08 | 8.21 | 0.00 | 1.41 | 0.00 | 0.00 | 0.00 | 0.58 | 2.21 | 6.98 | 4.56 | 28.72 | |||||||||||||
| 1947 | 1.91 | 4.51 | 7.52 | 2.60 | 0.33 | 1.42 | 0.00 | 0.00 | 0.00 | 6.58 | 2.33 | 1.34 | 28.54 | |||||||||||||
| 1948 | 3.13 | 4.82 | 8.03 | 8.71 | 3.10 | 0.00 | z | 0.00 | 0.00 | 0.00 | 0.48 | 1.99 | 7.45 | 37.71 | ||||||||||||
| 1949 | 4.40 | 5.59 | 12.24 | 0.07 | 0.88 | 0.00 | 0.00 | 0.21 | 0.34 | 0.05 | 3.29 | 2.48 | 29.55 | |||||||||||||
| 1950 | 13.61 | 5.30 | 4.95 | 3.33 | 1.55 | 0.19 | 0.00 | 0.00 | 1.02 | 5.70 | 14.64 | 10.06 | 60.35 | |||||||||||||
| 1951 | 9.77 | 5.65 | 4.33 | 2.58 | 2.51 | 0.00 | 0.00 | 0.00 | 0.00 | 3.88 | 6.51 | 11.96 | 47.19 | |||||||||||||
| 1952 | 14.74 | a | 6.52 | 9.64 | 1.65 | 1.14 | 0.66 | 0.05 | 0.00 | 0.16 | 0.00 | 2.40 | 9.51 | 46.47 | ||||||||||||
| 1953 | 9.00 | 0.08 | 5.53 | 5.79 | 1.87 | 1.53 | 0.00 | 0.00 | 0.00 | 1.61 | 4.40 | 2.51 | 32.32 | |||||||||||||
| 1954 | 6.39 | 5.70 | 10.17 | 3.42 | 0.46 | 1.10 | 0.00 | 0.00 | 0.00 | 0.14 | 3.64 | 11.03 | 42.05 | |||||||||||||
| 1955 | 7.05 | 3.52 | 0.82 | 6.37 | 1.23 | 0.00 | 0.00 | 0.00 | 0.12 | 0.27 | 3.89 | 23.29 | 46.56 | |||||||||||||
| 1956 | 11.92 | 4.38 | 0.63 | 3.65 | 3.55 | 0.03 | 0.00 | 0.00 | 0.45 | 3.57 | 0.03 | 1.62 | 29.83 | |||||||||||||
| 1957 | 5.01 | 6.98 | 6.81 | 3.05 | 6.46 | 0.13 | 0.00 | 0.00 | 0.48 | 2.08 | 2.65 | 6.69 | 40.34 | |||||||||||||
| 1958 | 8.39 | 10.61 | 13.87 | 9.27 | 1.32 | 1.05 | 0.00 | 0.20 | 0.34 | 0.28 | 1.10 | 1.59 | 48.02 | |||||||||||||
| 1959 | 8.73 | 6.99 | 1.70 | 2.09 | 0.17 | 0.00 | 0.00 | 0.00 | 2.75 | 0.00 | 0.00 | 2.21 | 24.64 | |||||||||||||
| 1960 | 7.76 | 8.80 | 5.25 | 3.61 | 1.06 | 0.00 | 0.00 | 0.00 | 0.04 | 0.39 | 6.98 | 2.38 | 36.27 | |||||||||||||
| 1961 | 1.85 | 3.43 | 5.59 | 1.61 | 2.05 | 0.01 | 0.02 | 0.00 | 0.26 | 0.73 | 2.98 | 3.20 | 21.73 | |||||||||||||
| 1962 | 3.51 | 12.93 | 5.16 | 1.66 | 0.11 | 0.00 | 0.05 | 0.01 | 0.00 | 11.39 | 1.28 | 4.32 | 40.42 | |||||||||||||
| 1963 | 4.05 | 6.06 | 6.63 | 8.11 | 2.45 | 0.05 | 0.00 | 0.00 | 0.35 | 2.83 | 8.63 | 0.87 | 40.03 | |||||||||||||
| 1964 | 6.73 | 0.88 | 3.47 | 1.00 | 4.00 | 0.64 | 0.00 | 0.20 | 0.14 | 1.82 | 6.66 | 18.32 | 43.86 | |||||||||||||
| 1965 | 7.42 | 1.79 | 2.59 | 6.76 | 0.02 | 0.05 | 0.00 | 1.21 | 0.01 | 0.58 | 8.51 | 6.73 | 35.67 | |||||||||||||
| 1966 | 3.50 | 3.21 | 1.70 | 1.39 | 0.28 | 0.02 | 0.10 | 0.02 | 0.03 | 0.00 | 8.23 | 7.03 | 25.51 | |||||||||||||
| 1967 | 12.30 | 0.91 | 7.73 | 8.97 | 0.70 | 1.56 | 0.00 | 0.00 | 0.08 | 1.50 | 4.42 | 4.94 | 43.11 | |||||||||||||
| 1968 | 6.52 | 4.41 | 3.87 | 0.51 | 1.01 | 0.32 | 0.00 | 0.85 | 0.00 | 1.78 | 6.29 | 7.55 | 33.11 | |||||||||||||
| 1969 | 16.57 | 8.80 | 3.38 | 4.43 | 0.02 | 0.34 | 0.47 | 0.00 | 0.06 | 2.68 | 3.21 | 9.67 | 49.63 | |||||||||||||
| 1970 | 16.20 | 3.31 | 4.43 | 1.23 | 0.00 | 1.09 | 0.00 | 0.00 | 0.01 | 1.99 | 11.31 | 11.82 | 51.39 | |||||||||||||
| 1971 | 3.23 | 0.70 | 5.58 | 1.59 | 1.18 | 0.50 | 0.00 | 0.00 | 0.37 | 0.95 | 4.16 | 8.64 | 26.90 | |||||||||||||
| 1972 | 2.52 | 4.29 | 1.32 | 3.17 | 0.33 | 0.43 | 0.00 | 0.00 | 2.36 | 1.43 | 7.22 | 5.06 | 28.13 | |||||||||||||
| 1973 | 14.53 | 8.27 | 5.08 | 0.84 | 0.40 | 0.02 | 0.00 | 0.00 | 0.59 | 3.46 | 10.37 | 8.65 | 52.21 | |||||||||||||
| 1974 | 6.01 | 2.82 | 10.01 | 4.13 | 0.00 | 0.70 | 3.62 | 0.03 | 0.00 | 3.26 | 1.71 | 2.13 | 34.42 | |||||||||||||
| 1975 | 2.69 | 9.49 | 8.40 | 3.97 | 0.55 | 0.33 | 0.00 | 1.01 | 0.11 | 4.86 | 2.22 | 1.24 | 34.87 | |||||||||||||
| 1976 | 0.62 | 2.54 | 1.53 | 1.72 | 0.03 | 0.02 | 0.24 | 1.57 | 1.67 | 0.15 | 1.59 | 0.17 | 11.85 | |||||||||||||
| 1977 | 2.90 | 2.05 | 1.73 | 0.16 | 3.36 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 3.20 | 9.11 | 22.51 | ||||||||
| 1978 | 0.00 | z | 5.62 | 8.01 | 0.00 | z | 0.21 | 0.13 | 0.00 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 13.97 | ||||||
| 1979 | 7.68 | 8.03 | 5.76 | 1.73 | 1.10 | 0.00 | 0.38 | 0.00 | 0.00 | 3.30 | 3.53 | 4.55 | 36.06 | |||||||||||||
| 1980 | 15.33 | 11.51 | 3.18 | 2.44 | 1.36 | 0.16 | 0.76 | 0.00 | 0.00 | z | 0.90 | 1.11 | 2.50 | 39.25 | ||||||||||||
| 1981 | 0.00 | z | 2.13 | 7.73 | 1.27 | 1.41 | 0.00 | 0.00 | 0.00 | 0.63 | 5.54 | 12.16 | 9.05 | 39.92 | ||||||||||||
| 1982 | 10.51 | a | 6.55 | 10.76 | 7.98 | 0.22 | 0.38 | 0.00 | 0.05 | 3.76 | a | 6.03 | 10.26 | 8.99 | 65.49 | |||||||||||
| 1983 | 10.10 | 9.98 | 14.43 | 6.84 | 1.34 | 0.26 | 0.00 | 0.27 | 0.44 | 2.71 | 13.13 | c | 15.05 | 74.55 | ||||||||||||
| 1984 | 0.42 | 4.86 | 3.30 | 1.92 | 0.04 | 0.71 | 0.00 | 0.05 | 0.10 | 3.19 | 10.46 | 2.17 | 27.22 | |||||||||||||
| 1985 | 0.95 | 3.41 | 6.13 | 0.15 | 0.00 | 0.45 | 0.00 | 0.23 | 1.30 | 1.48 | 7.96 | 4.14 | a | 26.20 | ||||||||||||
| 1986 | 6.08 | 18.87 | 7.00 | 1.48 | 1.01 | 0.00 | 0.00 | 0.00 | 2.07 | 0.21 | 0.86 | 1.18 | 38.76 | |||||||||||||
| 1987 | 4.17 | 4.66 | 5.86 | 0.29 | 0.57 | 0.00 | 0.00 | z | 0.00 | 0.00 | 1.15 | 2.45 | 6.70 | 25.85 | ||||||||||||
| 1988 | 5.29 | 0.57 | 1.06 | 4.22 | 1.04 | 0.30 | 0.15 | 0.00 | 0.00 | 0.00 | 7.69 | 5.13 | 25.45 | |||||||||||||
| 1989 | 2.15 | 3.00 | 11.31 | 1.11 | 0.65 | 1.09 | 0.00 | 0.09 | 8.09 | 3.26 | 2.93 | 0.00 | 33.68 | |||||||||||||
| 1990 | 5.79 | 4.38 | 2.60 | 2.50 | 3.41 | 0.00 | 0.07 | 0.00 | 0.04 | 1.53 | 1.94 | 1.17 | 23.43 | |||||||||||||
| 1991 | 0.63 | 2.84 | 15.93 | 1.23 | 1.48 | 1.53 | 0.00 | z | 0.51 | 0.00 | 3.61 | 1.74 | 2.87 | 32.37 | ||||||||||||
| 1992 | 2.54 | 10.05 | 5.40 | 1.37 | 0.00 | 0.64 | a | 0.00 | 0.00 | 0.00 | 2.25 | 0.49 | 11.35 | 34.09 | ||||||||||||
| 1993 | 13.37 | 9.35 | 5.93 | 2.21 | 2.53 | 1.28 | 0.00 | 0.00 | 0.00 | 0.95 | 2.95 | 5.00 | 43.57 | |||||||||||||
| 1994 | 3.53 | 6.91 | 0.28 | 3.02 | 2.44 | 0.12 | 0.00 | 0.00 | 0.22 | 1.08 | 9.35 | 8.29 | 35.24 | |||||||||||||
| 1995 | 16.53 | 1.49 | 15.17 | 6.33 | 4.71 | 2.22 | 0.02 | 0.00 | 0.00 | 0.00 | 0.33 | 9.04 | 55.84 | |||||||||||||
| 1996 | 10.71 | 10.26 | 4.83 | 4.46 | 4.21 | 0.17 | 0.02 | 0.01 | 0.11 | 1.33 | 6.57 | 19.86 | c | 62.54 | ||||||||||||
| 1997 | 19.22 | d | 1.35 | b | 0.61 | 1.61 | a | 0.29 | 0.34 | 0.02 | 0.46 | 0.51 | 2.42 | 5.88 | a | 3.49 | 36.20 | |||||||||
| 1998 | 14.60 | c | 14.92 | d | 5.73 | 5.11 | d | 8.22 | e | 0.82 | a | 0.02 | 0.00 | 1.06 | b | 0.83 | a | 5.67 | f | 4.30 | c | 55.61 | ||||
| 1999 | 9.03 | c | 12.72 | a | 3.87 | a | 2.56 | d | 1.00 | a | 0.25 | 0.00 | 0.14 | 0.07 | 1.43 | 4.31 | d | 0.89 | a | 36.27 | ||||||
| 2000 | 12.25 | b | 14.95 | c | 2.36 | b | 2.68 | d | 3.65 | b | 0.59 | 0.00 | 0.00 | 1.26 | 6.19 | b | 1.76 | 1.37 | a | 47.06 | ||||||
| 2001 | 5.07 | b | 7.60 | d | 2.27 | b | 0.00 | z | 0.00 | 0.11 | 0.00 | 0.00 | 0.47 | 0.78 | 5.67 | g | 10.62 | h | 16.30 | |||||||
| 2002 | 4.51 | d | 3.98 | c | 6.47 | d | 0.80 | b | 1.89 | b | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.79 | 10.98 | d | 32.42 | |||||||
| 2003 | 1.30 | 2.67 | 3.68 | b | 8.78 | a | 1.98 | 0.00 | 0.00 | 0.98 | 0.02 | 0.02 | 3.38 | 8.74 | 31.55 | |||||||||||
| 2004 | 3.10 | a | 8.33 | 1.60 | 0.50 | 0.14 | 0.00 | 0.00 | 0.00 | 0.53 | 6.90 | d | 4.24 | g | 7.74 | 28.84 | ||||||||||
| 2005 | 9.93 | g | 4.47 | d | 11.29 | 2.52 | 3.56 | 2.08 | 0.00 | 0.04 | 0.46 | 0.56 | 2.24 | 14.02 | 41.24 | |||||||||||
| 2006 | 13.23 | d | 4.11 | 12.07 | 11.78 | 0.99 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 42.18 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 7.05 | 6.70 | 5.85 | 3.19 | 1.51 | 0.46 | 0.08 | 0.09 | 0.56 | 2.12 | 4.52 | 6.52 | 38.65 | |||||||||||||
| S.D. | 4.75 | 4.44 | 3.81 | 2.61 | 1.58 | 0.64 | 0.40 | 0.28 | 1.15 | 2.10 | 3.48 | 4.73 | 11.27 | |||||||||||||
| SKEW | 0.71 | 0.81 | 0.68 | 1.17 | 1.71 | 1.84 | 8.24 | 3.63 | 4.06 | 1.55 | 0.85 | 1.01 | 0.61 | |||||||||||||
| MAX | 19.22 | 19.31 | 15.93 | 11.78 | 8.22 | 3.05 | 3.62 | 1.57 | 8.09 | 11.39 | 14.64 | 23.29 | 74.55 | |||||||||||||
| MIN | 0.42 | 0.08 | 0.11 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 11.85 | |||||||||||||
| NO YRS | 89 | 92 | 92 | 90 | 92 | 89 | 87 | 88 | 88 | 89 | 86 | 89 | 78 | |||||||||||||