| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1935 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.26 | v | 1.93 | 0.35 | 0.00 | 0.30 | 0.89 | 0.80 | 1.36 | 5.63 | ||||||||
| 1936 | 1.93 | 1.58 | 0.34 | 0.95 | 0.88 | 2.00 | 0.00 | 0.00 | 0.60 | 0.30 | 0.06 | 1.24 | 9.88 | |||||||||||||
| 1937 | 2.50 | 0.61 | 2.06 | 1.51 | 0.26 | 3.21 | 0.21 | 0.27 | 0.27 | 0.87 | 2.13 | 1.95 | 15.85 | |||||||||||||
| 1938 | 0.92 | 1.77 | 1.46 | 1.87 | 0.10 | 1.52 | 1.43 | 0.07 | 0.28 | 1.15 | 0.72 | 0.56 | 11.85 | |||||||||||||
| 1939 | 0.60 | 1.15 | 1.25 | 0.12 | 0.33 | 0.66 | 0.53 | 0.00 | 0.63 | 0.28 | 0.00 | 1.70 | 7.25 | |||||||||||||
| 1940 | 2.04 | 2.49 | 1.60 | 2.77 | 0.13 | 0.00 | 0.99 | 0.00 | 2.33 | 1.69 | 1.90 | 0.61 | 16.55 | |||||||||||||
| 1941 | 1.41 | 1.15 | 0.76 | 0.63 | 2.06 | 2.19 | 0.13 | 1.39 | 1.38 | 1.47 | 1.76 | 1.44 | 15.77 | |||||||||||||
| 1942 | 1.76 | 2.17 | 0.47 | 1.37 | 2.34 | 1.53 | 0.76 | 0.06 | 0.00 | 1.20 | 3.31 | 3.47 | 18.44 | |||||||||||||
| 1943 | 1.41 | 0.12 | 0.82 | 2.21 | 0.53 | 1.67 | 0.10 | 1.18 | 0.00 | 2.00 | 0.45 | 0.94 | 11.43 | |||||||||||||
| 1944 | 0.52 | 1.62 | 0.60 | 1.45 | 0.28 | 1.52 | 0.18 | 0.00 | 0.39 | 0.98 | 1.23 | 0.79 | 9.56 | |||||||||||||
| 1945 | 1.25 | 1.63 | 1.96 | 0.77 | 3.93 | 0.16 | 0.00 | 0.37 | 1.09 | 0.58 | 2.15 | 1.84 | 15.73 | |||||||||||||
| 1946 | 0.85 | 0.62 | 1.91 | 0.34 | 1.68 | 2.29 | 0.04 | 0.15 | 0.81 | 1.70 | 1.20 | 0.56 | 12.15 | |||||||||||||
| 1947 | 1.10 | 0.79 | 0.96 | 1.29 | 0.31 | 2.14 | 1.82 | 0.75 | 1.27 | 4.00 | 2.73 | 1.18 | 18.34 | |||||||||||||
| 1948 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.58 | 0.51 | a | 1.36 | 0.62 | a | 1.08 | 1.99 | 7.14 | |||||
| 1949 | 0.22 | a | 1.76 | 1.57 | a | 0.40 | 1.14 | 0.04 | 0.00 | a | 0.00 | a | 0.25 | 0.47 | 2.28 | 1.06 | 9.19 | |||||||||
| 1950 | 3.38 | 0.26 | 1.49 | 0.96 | 0.95 | 2.59 | 0.00 | 0.38 | 0.33 | a | 3.22 | 1.97 | 2.11 | a | 17.64 | |||||||||||
| 1951 | 1.31 | 1.62 | 0.50 | 0.85 | 1.00 | 1.32 | 0.19 | 0.10 | 0.20 | 0.67 | 1.43 | a | 1.55 | 10.74 | ||||||||||||
| 1952 | 1.12 | 1.25 | 0.45 | 0.42 | 1.12 | 2.25 | 0.00 | d | 0.90 | 0.94 | 0.13 | 0.21 | 1.96 | a | 10.75 | |||||||||||
| 1953 | 2.26 | 2.05 | 1.57 | 1.01 | 1.76 | 1.03 | a | 0.00 | 1.49 | a | 0.00 | 0.97 | 2.16 | 1.67 | 15.97 | |||||||||||
| 1954 | 1.63 | 0.71 | 0.86 | 0.67 | 0.89 | 1.77 | 0.00 | 0.59 | 0.40 | 0.78 | 0.71 | 0.64 | 9.65 | |||||||||||||
| 1955 | 0.80 | 0.55 | 1.23 | 1.77 | 1.32 | 0.54 | 1.01 | 0.00 | 0.77 | 1.52 | 2.41 | 2.52 | 14.44 | |||||||||||||
| 1956 | 3.43 | a | 0.80 | 0.86 | a | 0.00 | 2.59 | 1.69 | 0.48 | 0.47 | a | 0.00 | 1.59 | 0.33 | 0.94 | 13.18 | ||||||||||
| 1957 | 1.10 | 1.00 | 4.59 | 1.45 | 1.74 | 0.27 | 0.00 | a | 0.00 | 1.55 | 2.40 | 0.63 | a | 1.83 | 16.56 | |||||||||||
| 1958 | 1.32 | 2.02 | 1.09 | 1.58 | 1.92 | 0.29 | 0.07 | 0.01 | 0.19 | 0.02 | 2.19 | 1.46 | 12.16 | |||||||||||||
| 1959 | 2.19 | 1.46 | 1.38 | 0.45 | 0.60 | 0.53 | 0.02 | 0.03 | 0.83 | 0.39 | 0.33 | 0.61 | 8.82 | |||||||||||||
| 1960 | 1.61 | 0.80 | 2.00 | 0.50 | 2.31 | 0.26 | 0.07 | 0.59 | 0.49 | 0.49 | 1.02 | 0.61 | 10.75 | |||||||||||||
| 1961 | 0.98 | 1.91 | 2.14 | 0.79 | 1.87 | 1.50 | 0.75 | 1.25 | 0.12 | 0.87 | 1.48 | 1.04 | 14.70 | |||||||||||||
| 1962 | 1.01 | 0.79 | 1.53 | 0.97 | 3.68 | 0.05 | 0.00 | 0.99 | 0.68 | 1.56 | 1.58 | 1.21 | 14.05 | |||||||||||||
| 1963 | 0.98 | 1.38 | 0.62 | 3.01 | 1.45 | 0.34 | 1.07 | 0.00 | 1.11 | 0.33 | 1.96 | 1.12 | 13.37 | |||||||||||||
| 1964 | 1.13 | 0.09 | 0.47 | 0.29 | 0.01 | 1.14 | 1.30 | 0.10 | 0.05 | 1.19 | 1.65 | 4.68 | 12.10 | |||||||||||||
| 1965 | 2.05 | 0.15 | 1.35 | 0.36 | 0.95 | 1.72 | 0.52 | 1.63 | 0.34 | 0.25 | 1.98 | 0.34 | 11.64 | |||||||||||||
| 1966 | 1.25 | 1.06 | 0.91 | 0.06 | 0.36 | 0.53 | 1.32 | 0.00 | 0.78 | 0.54 | 2.56 | 2.66 | 12.03 | |||||||||||||
| 1967 | 1.15 | 0.18 | 1.06 | 2.16 | 0.89 | 0.52 | 0.00 | 0.00 | 0.33 | 0.73 | 0.77 | 0.65 | 8.44 | |||||||||||||
| 1968 | 0.93 | 0.93 | 0.25 | 0.16 | 1.82 | 0.57 | 0.06 | 1.58 | 0.59 | 1.06 | 2.26 | 2.06 | 12.27 | |||||||||||||
| 1969 | 3.09 | 0.66 | 0.76 | 1.59 | 0.98 | 3.30 | 0.18 | 0.00 | 0.72 | 0.58 | 0.47 | 1.46 | 13.79 | |||||||||||||
| 1970 | 3.98 | 1.69 | 1.30 | 0.32 | 0.63 | 0.71 | 0.15 | 0.20 | 0.00 | 0.38 | 1.71 | 0.58 | 11.65 | |||||||||||||
| 1971 | 0.67 | 0.33 | 0.98 | 1.09 | 1.56 | 0.94 | 0.30 | 0.38 | 1.09 | 0.81 | 1.56 | 1.44 | 11.15 | |||||||||||||
| 1972 | 1.19 | 0.72 | 1.24 | 0.38 | 0.52 | 1.34 | 0.28 | 0.00 | 0.27 | 0.85 | 0.98 | 1.50 | 9.27 | |||||||||||||
| 1973 | 0.69 | 0.78 | 0.54 | 0.08 | 0.39 | 0.38 | 0.00 | 0.02 | 2.17 | 1.07 | 3.23 | 3.10 | 12.45 | |||||||||||||
| 1974 | 0.69 | 0.00 | z | 1.01 | 1.69 | 0.05 | 0.25 | 0.34 | 0.00 | 0.00 | 0.28 | 0.81 | 0.51 | 5.63 | ||||||||||||
| 1975 | 2.60 | 1.28 | 0.75 | 0.69 | 0.20 | 0.18 | 0.45 | 0.70 | 0.00 | 1.30 | 0.81 | 1.36 | 10.32 | |||||||||||||
| 1976 | 1.31 | 0.86 | 0.60 | 1.37 | 0.48 | 0.18 | 0.09 | 2.49 | 0.22 | 0.22 | 0.17 | 0.22 | 8.21 | |||||||||||||
| 1977 | 0.34 | 0.29 | 0.40 | 0.10 | 1.61 | 0.13 | 0.03 | 1.31 | 1.22 | 0.27 | 2.27 | 2.49 | 10.46 | |||||||||||||
| 1978 | 2.12 | 1.03 | 0.51 | 1.82 | 0.15 | a | 1.03 | 0.40 | 1.51 | 0.28 | 0.00 | 1.83 | 0.78 | 11.46 | ||||||||||||
| 1979 | 1.43 | 0.75 | 1.43 | 2.39 | 1.17 | 0.00 | 0.00 | 1.73 | 0.40 | 2.60 | 2.20 | 0.62 | 14.72 | |||||||||||||
| 1980 | 1.58 | t | 2.50 | 1.04 | 0.63 | 2.95 | 1.47 | 0.25 | 0.21 | 0.33 | 0.00 | z | 1.25 | 0.65 | e | 11.28 | ||||||||||
| 1981 | 1.27 | 0.74 | 0.65 | 0.71 | 1.96 | 1.21 | 0.08 | 0.04 | 1.09 | 0.64 | 2.39 | 3.11 | e | 13.89 | ||||||||||||
| 1982 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.70 | 0.00 | z | 0.00 | z | 2.92 | 1.55 | 0.00 | z | 0.00 | z | 5.17 | ||||
| 1983 | 0.00 | z | 0.00 | z | 0.69 | g | 1.17 | 2.45 | 0.64 | 1.36 | 0.50 | 0.52 | 1.07 | 1.84 | 2.99 | 12.54 | ||||||||||
| 1984 | 0.53 | 1.31 | 2.45 | 1.04 | 0.99 | 1.97 | 0.34 | 0.56 | 1.05 | 0.86 | 1.60 | 0.71 | 13.41 | |||||||||||||
| 1985 | 0.30 | 1.24 | 0.67 | 0.32 | 0.53 | 0.18 | 0.04 | 0.10 | 0.95 | 1.53 | 1.72 | 0.60 | z | 7.58 | ||||||||||||
| 1986 | 1.42 | 2.87 | 1.54 | 0.42 | 0.97 | 0.10 | 0.56 | 0.26 | 1.02 | 0.70 | 2.12 | 1.43 | 13.41 | |||||||||||||
| 1987 | 1.10 | 1.04 | 1.86 | 0.56 | 0.36 | 0.40 | 0.41 | 0.28 | 0.06 | 0.03 | 0.81 | 1.68 | 8.59 | |||||||||||||
| 1988 | 2.80 | 0.00 | 0.74 | 3.07 | 1.29 | 1.37 | 0.00 | 0.00 | 0.37 | 0.04 | 2.47 | 0.33 | 12.48 | |||||||||||||
| 1989 | 1.10 | 1.38 | z | 1.99 | m | 1.79 | 1.07 | 0.30 | 0.17 | 0.58 | 0.05 | 0.53 | 1.19 | 0.63 | 7.41 | |||||||||||
| 1990 | 0.00 | z | 0.53 | 0.85 | 0.94 | 1.26 | 0.54 | 0.47 | 0.00 | z | 0.00 | z | 1.00 | a | 0.00 | z | 2.00 | 7.59 | ||||||||
| 1991 | 0.00 | z | 0.00 | z | 0.00 | z | 1.00 | 2.56 | 1.06 | 0.20 | 0.08 | 0.00 | 1.19 | 2.63 | 0.75 | 9.47 | ||||||||||
| 1992 | 0.00 | z | 1.25 | 0.35 | 2.39 | 0.30 | 0.00 | z | 0.85 | a | 0.22 | 0.43 | 1.22 | 1.98 | 1.94 | 10.93 | ||||||||||
| 1993 | 2.19 | 1.09 | c | 2.40 | 2.12 | 2.77 | 2.37 | i | 1.35 | 0.33 | 0.00 | 0.45 | 0.63 | 0.59 | 13.92 | |||||||||||
| 1994 | 0.59 | 1.45 | 0.55 | 0.57 | 2.77 | 1.25 | 0.37 | 0.00 | 0.09 | 2.36 | 0.88 | 0.50 | 11.38 | |||||||||||||
| 1995 | 2.74 | 1.53 | 1.12 | 2.28 | 3.05 | 0.00 | z | 0.10 | 0.00 | z | 0.84 | 1.01 | 1.59 | 1.55 | a | 15.81 | ||||||||||
| 1996 | 1.66 | 2.23 | 1.69 | 0.58 | 1.36 | 1.06 | 0.11 | 0.05 | 0.38 | 1.29 | 3.77 | 2.80 | d | 16.98 | ||||||||||||
| 1997 | 2.16 | 0.34 | 1.95 | 1.88 | 1.10 | 0.00 | z | 0.00 | z | 0.42 | 0.74 | 1.39 | 0.00 | z | 0.55 | 10.53 | ||||||||||
| 1998 | 3.16 | 1.08 | 1.19 | 0.00 | z | 3.08 | 0.00 | z | 0.00 | z | 0.00 | z | 0.85 | 0.44 | 1.99 | 0.00 | z | 11.79 | ||||||||
| 1999 | 0.61 | 0.00 | z | 0.00 | z | 0.00 | 0.84 | 0.00 | z | 0.00 | 0.50 | 0.20 | 0.00 | z | 0.52 | 0.49 | 3.16 | |||||||||
| 2000 | 2.20 | 2.83 | 1.17 | 0.43 | 1.00 | 0.00 | z | 0.00 | 0.00 | 0.49 | 1.09 | a | 0.83 | 0.00 | 10.04 | |||||||||||
| 2001 | 0.00 | 1.00 | 1.27 | 2.05 | 0.00 | 0.00 | z | 0.00 | z | 0.16 | 0.00 | 1.03 | 0.88 | 1.37 | 7.76 | |||||||||||
| 2002 | 0.17 | 0.80 | 0.61 | 0.98 | 0.85 | 1.97 | a | 0.25 | 0.05 | 0.13 | 0.40 | 0.30 | 1.94 | a | 8.45 | |||||||||||
| 2003 | 2.43 | 1.28 | 0.63 | 1.52 | 0.00 | z | 0.00 | 0.00 | 0.16 | 0.00 | z | 0.79 | 1.51 | 3.07 | 11.39 | |||||||||||
| 2004 | 1.78 | 1.00 | 0.55 | 1.05 | 1.46 | 0.67 | 0.30 | 1.93 | 0.45 | 0.59 | 0.95 | 1.73 | 12.46 | |||||||||||||
| 2005 | 0.85 | 0.30 | 0.55 | a | 1.30 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.33 | 0.54 | d | 3.06 | 7.93 | ||||||
| 2006 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 2.35 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 2.35 | ||
| 2007 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| 2008 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| 2009 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.50 | 1.05 | 1.50 | 3.05 | ||||
| 2010 | 2.60 | 0.86 | 0.39 | 0.60 | 0.75 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 5.20 | ||||||
| 2011 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.91 | y | 0.46 | z | 0.30 | z | 0.00 | |
| 2012 | 1.58 | z | 0.48 | z | 0.25 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.50 | 1.13 | 1.14 | 1.09 | 1.28 | 1.03 | 0.37 | 0.45 | 0.59 | 0.98 | 1.46 | 1.45 | 12.47 | |||||||||||||
| S.D. | 0.88 | 0.67 | 0.70 | 0.77 | 0.94 | 0.83 | 0.46 | 0.58 | 0.58 | 0.73 | 0.84 | 0.92 | 2.81 | |||||||||||||
| SKEW | 0.70 | 0.62 | 2.02 | 0.68 | 0.79 | 0.72 | 1.47 | 1.52 | 1.66 | 1.62 | 0.34 | 1.00 | 0.32 | |||||||||||||
| MAX | 3.98 | 2.87 | 4.59 | 3.07 | 3.93 | 3.30 | 1.82 | 2.49 | 2.92 | 4.00 | 3.77 | 4.68 | 18.44 | |||||||||||||
| MIN | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 7.25 | |||||||||||||
| NO YRS | 64 | 64 | 65 | 68 | 68 | 61 | 66 | 66 | 68 | 70 | 69 | 69 | 51 | |||||||||||||