| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1941 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | ||
| 1942 | 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 | |
| 1943 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.22 | 0.79 | 0.26 | 0.00 | z | 0.00 | 3.12 | 0.61 | 0.78 | 5.78 | ||||||||
| 1944 | 2.61 | 2.00 | 1.48 | 0.87 | 0.34 | 0.70 | 1.20 | 0.12 | 0.22 | 0.75 | 3.96 | 1.43 | 15.68 | |||||||||||||
| 1945 | 0.92 | 2.95 | 1.11 | 0.65 | 2.88 | 0.19 | 0.16 | 0.00 | 0.00 | z | 2.26 | 4.68 | 6.59 | 22.39 | ||||||||||||
| 1946 | 2.92 | 2.00 | 1.07 | a | 0.00 | 0.59 | 0.00 | z | 1.13 | 0.00 | 0.14 | 1.31 | 4.34 | 1.28 | 14.78 | |||||||||||
| 1947 | 1.86 | 2.27 | 3.09 | 0.30 | 0.13 | 0.90 | 0.62 | 0.31 | 0.00 | 3.64 | 0.68 | 1.12 | 14.92 | |||||||||||||
| 1948 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.09 | 0.00 | 0.95 | 1.03 | 3.02 | 4.91 | 10.00 | |||||||
| 1949 | 0.15 | 2.28 | 1.25 | 0.55 | c | 2.05 | 0.04 | 0.00 | 0.00 | 0.31 | 0.48 | 2.03 | 1.26 | 10.40 | ||||||||||||
| 1950 | 6.98 | 0.58 | 3.69 | 0.49 | 0.35 | 1.18 | 0.00 | 0.58 | 0.43 | 8.45 | 2.59 | 3.79 | 29.11 | |||||||||||||
| 1951 | 5.45 | 3.94 | 0.42 | 2.44 | 0.44 | 0.00 | 0.02 | 0.75 | 0.00 | b | 1.00 | g | 4.22 | 6.76 | 24.44 | |||||||||||
| 1952 | 5.62 | 4.65 | a | 0.00 | z | 0.58 | 0.95 | 1.89 | 0.35 | 0.00 | 0.02 | 0.05 | 2.29 | 9.97 | a | 26.37 | ||||||||||
| 1953 | 9.12 | 1.35 | 1.91 | 1.08 | 3.36 | 1.17 | 0.00 | 0.35 | 0.13 | 1.14 | 4.53 | 1.75 | 25.89 | |||||||||||||
| 1954 | 10.23 | 2.97 | 1.65 | 1.64 | 0.00 | 1.23 | 0.00 | 1.05 | 0.50 | 0.60 | 2.55 | 4.20 | 26.62 | |||||||||||||
| 1955 | 1.55 | 0.60 | 0.78 | 0.40 | 0.01 | 0.60 | 0.50 | 0.40 | 0.15 | 1.25 | 6.69 | 11.91 | c | 24.84 | ||||||||||||
| 1956 | 7.84 | 3.25 | d | 0.60 | 0.41 | 0.40 | 0.12 | 0.40 | 0.15 | 0.85 | 4.05 | 0.00 | 0.94 | 19.01 | ||||||||||||
| 1957 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.93 | 0.00 | 0.04 | 0.12 | 1.04 | 3.06 | 0.60 | 4.08 | 10.87 | |||||||||
| 1958 | 6.29 | 7.55 | 2.00 | 0.65 | 0.75 | 2.35 | 1.33 | 0.32 | 0.20 | 0.49 | 1.59 | 2.68 | 26.20 | |||||||||||||
| 1959 | 2.08 | 2.38 | 0.51 | 0.06 | 0.16 | 0.00 | 0.00 | 0.02 | 0.07 | 0.02 | 0.06 | 0.68 | 6.04 | |||||||||||||
| 1960 | 0.88 | 6.66 | 2.64 | 0.15 | 1.67 | 0.00 | 0.26 | 0.00 | 0.00 | 0.09 | 6.73 | 2.00 | 21.08 | |||||||||||||
| 1961 | 2.50 | 3.58 | 1.74 | 0.80 | 0.62 | 0.39 | 0.01 | 1.22 | 0.16 | 1.55 | 2.96 | 2.51 | 18.04 | |||||||||||||
| 1962 | 1.03 | 3.00 | 1.53 | 1.20 | 1.28 | 0.00 | 0.54 | 0.75 | 0.06 | 7.15 | 4.02 | 3.75 | 24.31 | |||||||||||||
| 1963 | 1.90 | 4.44 | 1.85 | 2.85 | 0.62 | 0.27 | 0.18 | 0.00 | 0.05 | 1.41 | 5.47 | 1.38 | 20.42 | |||||||||||||
| 1964 | 7.02 | 0.80 | 0.65 | 0.00 | 0.31 | 0.65 | 0.06 | 0.00 | 0.00 | 0.40 | 2.95 | 14.56 | 27.40 | |||||||||||||
| 1965 | 3.75 | 0.60 | 0.00 | 1.39 | 0.30 | 0.88 | 0.00 | 1.91 | 0.00 | 0.00 | z | 1.76 | 5.00 | 15.59 | ||||||||||||
| 1966 | 6.53 | 0.16 | 1.74 | 0.70 | 2.92 | 0.10 | 0.06 | 0.03 | 0.84 | 0.04 | 2.97 | 5.07 | 21.16 | |||||||||||||
| 1967 | 6.23 | 0.04 | 1.32 | 1.55 | 0.03 | 1.96 | 0.00 | 0.00 | 0.08 | 1.66 | 1.58 | 3.67 | 18.12 | |||||||||||||
| 1968 | 3.73 | 2.90 | 1.60 | 0.00 | 0.21 | 1.50 | 0.07 | 0.57 | 0.05 | 1.30 | 2.70 | 5.40 | 20.03 | |||||||||||||
| 1969 | 10.09 | 1.55 | 0.00 | 0.00 | 0.60 | 1.36 | 0.25 | 0.00 | 0.33 | 0.32 | 0.08 | 7.06 | 21.64 | |||||||||||||
| 1970 | 10.60 | 2.00 | 0.25 | 0.44 | 0.04 | 0.09 | 0.00 | 0.00 | 0.06 | 1.40 | 11.00 | 6.98 | 32.86 | |||||||||||||
| 1971 | 4.65 | 0.11 | 4.19 | 0.60 | 1.24 | 0.10 | 0.01 | 0.10 | 0.00 | 0.30 | 4.11 | 1.86 | 17.27 | |||||||||||||
| 1972 | 4.26 | 4.44 | 2.22 | 1.02 | 0.70 | 0.11 | 0.00 | 0.40 | 0.80 | 0.00 | z | 1.16 | 5.48 | 20.59 | ||||||||||||
| 1973 | 3.98 | 0.99 | 0.17 | 0.10 | 0.10 | 0.00 | 0.00 | 0.00 | 1.35 | 3.70 | 7.07 | 5.05 | 22.51 | |||||||||||||
| 1974 | 11.47 | 3.37 | 4.36 | 1.50 | 0.00 | 0.20 | 0.68 | 0.00 | 0.00 | 0.35 | 1.65 | 2.77 | 26.35 | |||||||||||||
| 1975 | 3.41 | 6.80 | 2.80 | 2.55 | 0.00 | 0.10 | 0.10 | 0.01 | 0.00 | 3.94 | 2.27 | 2.31 | 24.29 | |||||||||||||
| 1976 | 0.87 | 3.90 | a | 1.40 | b | 0.77 | 0.03 | 0.06 | 0.32 | 0.84 | 2.30 | 0.00 | 0.50 | 0.20 | 11.19 | |||||||||||
| 1977 | 1.10 | 1.79 | 0.90 | c | 0.20 | 1.40 | 0.82 | 0.00 | 0.03 | 0.00 | z | 1.19 | 4.51 | 5.51 | 17.45 | |||||||||||
| 1978 | 0.00 | z | 2.15 | 2.03 | 0.00 | z | 0.00 | 0.50 | 0.60 | 0.70 | 1.75 | 0.00 | 1.91 | 0.90 | 10.54 | |||||||||||
| 1979 | 2.50 | 7.31 | 0.71 | 0.66 | b | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | 3.14 | 2.77 | 2.98 | 20.07 | ||||||||
| 1980 | 4.70 | a | 4.95 | 1.75 | e | 4.85 | 0.03 | 1.03 | 0.00 | z | 0.00 | 0.00 | z | 2.03 | 0.72 | a | 5.04 | 25.10 | ||||||||
| 1981 | 2.08 | 2.03 | c | 1.75 | c | 0.80 | 0.30 | 0.00 | 0.00 | z | 0.00 | 0.70 | 2.57 | 9.10 | 10.25 | g | 19.33 | |||||||||
| 1982 | 2.46 | 5.28 | 3.17 | 1.16 | 0.00 | 1.23 | 0.00 | 0.00 | 0.10 | 2.86 | 4.80 | 10.53 | 31.59 | |||||||||||||
| 1983 | 2.40 | 15.30 | 5.70 | 0.80 | 0.00 | 0.00 | 0.00 | 1.59 | 0.20 | 0.05 | 5.98 | 5.37 | 37.39 | |||||||||||||
| 1984 | 1.25 | 3.50 | 2.20 | 0.00 | z | 0.07 | 0.00 | 0.80 | 0.07 | 0.00 | z | 0.00 | z | 0.00 | z | 0.24 | z | 7.89 | ||||||||
| 1985 | 0.04 | 1.82 | 1.45 | 0.00 | 2.40 | 0.09 | 0.85 | 0.00 | 0.70 | 3.05 | 2.63 | 1.35 | 14.38 | |||||||||||||
| 1986 | 7.50 | 10.16 | 2.20 | 0.00 | z | 0.00 | z | 0.65 | 0.00 | 0.00 | 1.78 | 0.19 | 1.90 | 1.48 | 25.86 | |||||||||||
| 1987 | 3.98 | 6.48 | 1.91 | 0.90 | 0.00 | 0.00 | z | 0.26 | 0.00 | z | 0.00 | 0.20 | 3.15 | 7.20 | 24.08 | |||||||||||
| 1988 | 3.90 | d | 1.00 | 0.10 | 0.69 | 0.50 | 1.46 | 0.00 | 0.20 | 0.00 | 0.20 | 6.29 | 0.89 | b | 15.23 | |||||||||||
| 1989 | 0.49 | 0.14 | 4.98 | a | 0.00 | z | 0.90 | 0.20 | 0.00 | 0.37 | 2.08 | 0.00 | z | 2.56 | 0.07 | 11.79 | ||||||||||
| 1990 | 4.69 | 0.78 | 0.95 | 0.44 | 9.28 | 0.00 | 0.27 | 0.50 | 0.09 | 0.68 | 0.80 | 0.71 | 19.19 | |||||||||||||
| 1991 | 0.59 | 2.55 | 4.97 | 0.78 | 1.70 | 0.11 | 1.30 | 0.10 | 0.00 | 0.90 | 5.19 | b | 2.64 | z | 18.19 | |||||||||||
| 1992 | 2.33 | 1.57 | b | 0.69 | 3.02 | 0.00 | 3.31 | 0.80 | 0.00 | 0.00 | 3.64 | 1.35 | 4.03 | 20.74 | ||||||||||||
| 1993 | 5.74 | a | 2.67 | a | 1.57 | c | 3.34 | x | 1.54 | s | 0.00 | g | 0.00 | 1.49 | 0.65 | 0.80 | 1.36 | 4.10 | 18.38 | |||||||
| 1994 | 1.70 | 1.79 | 1.46 | 0.30 | 0.93 | 0.03 | 0.25 | 0.00 | 0.10 | 0.11 | 5.35 | 1.74 | 13.76 | |||||||||||||
| 1995 | 11.00 | d | 0.75 | 8.13 | 3.03 | 0.14 | z | 0.55 | 1.17 | 0.00 | 0.00 | 0.00 | 2.36 | 8.60 | 35.59 | |||||||||||
| 1996 | 8.40 | 4.54 | 2.00 | 0.62 | 3.81 | 0.11 | 0.87 | 0.00 | 2.45 | 1.37 | 7.31 | 9.68 | 41.16 | |||||||||||||
| 1997 | 7.31 | 1.01 | 0.11 | 1.90 | 1.00 | z | 0.72 | 0.26 | 1.75 | 0.73 | 2.92 | 4.06 | 5.72 | 26.49 | ||||||||||||
| 1998 | 10.41 | a | 7.54 | 6.83 | 0.76 | 0.00 | z | 0.00 | 0.30 | 0.00 | 0.50 | 0.00 | z | 11.68 | g | 4.05 | a | 30.39 | ||||||||
| 1999 | 5.59 | 8.26 | a | 4.95 | 0.60 | 0.00 | 0.00 | 0.00 | 0.07 | 0.00 | 1.56 | 2.85 | b | 0.86 | 24.74 | |||||||||||
| 2000 | 20.60 | 11.80 | 8.20 | 3.17 | 2.20 | 0.40 | 1.00 | 0.00 | 0.01 | 2.77 | 1.94 | a | 1.30 | a | 53.39 | |||||||||||
| 2001 | 3.29 | 3.42 | a | 2.10 | 1.30 | 0.04 | 0.05 | 1.94 | 0.00 | 1.32 | 2.40 | 3.39 | c | 1.57 | 20.82 | |||||||||||
| 2002 | 5.83 | a | 1.62 | 0.54 | 1.73 | 0.24 | 0.13 | 0.60 | a | 0.00 | 0.05 | 0.00 | 3.35 | 8.40 | a | 22.49 | ||||||||||
| 2003 | 4.47 | 3.60 | 1.94 | b | 1.22 | 0.00 | z | 0.03 | 1.10 | a | 0.55 | 0.00 | z | 0.00 | z | 1.96 | 2.99 | 17.86 | ||||||||
| 2004 | 3.00 | c | 5.49 | 0.80 | 0.22 | 0.63 | 0.20 | 0.01 | 0.08 | 0.20 | 2.86 | 2.36 | 1.73 | d | 17.58 | |||||||||||
| 2005 | 3.48 | a | 0.75 | 5.03 | 4.82 | r | 4.43 | 2.12 | 0.00 | 0.00 | 0.04 | 0.57 | 5.96 | c | 9.95 | e | 32.33 | |||||||||
| 2006 | 6.84 | c | 3.13 | b | 2.57 | a | 0.05 | 0.00 | z | 0.00 | z | 0.00 | z | 0.05 | 0.00 | z | 0.00 | z | 0.00 | z | 6.87 | a | 19.51 | |||
| 2007 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1.52 | a | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 2.53 | d | 4.05 | |
| 2008 | 2.36 | e | 0.00 | z | 0.73 | b | 0.80 | 1.41 | m | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 3.89 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 4.70 | 3.40 | 2.14 | 1.00 | 0.98 | 0.58 | 0.35 | 0.28 | 0.42 | 1.63 | 3.27 | 4.12 | 22.57 | |||||||||||||
| S.D. | 3.67 | 2.96 | 1.88 | 0.97 | 1.56 | 0.72 | 0.45 | 0.47 | 0.62 | 1.73 | 2.26 | 3.21 | 8.75 | |||||||||||||
| SKEW | 1.59 | 1.71 | 1.54 | 1.75 | 3.20 | 1.56 | 1.40 | 1.98 | 1.78 | 1.74 | 1.03 | 1.06 | 1.25 | |||||||||||||
| MAX | 20.60 | 15.30 | 8.20 | 4.85 | 9.28 | 3.31 | 1.94 | 1.91 | 2.45 | 8.45 | 11.00 | 14.56 | 53.39 | |||||||||||||
| MIN | 0.04 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.07 | 6.04 | |||||||||||||
| NO YRS | 61 | 61 | 61 | 56 | 55 | 59 | 60 | 62 | 58 | 56 | 61 | 62 | 38 | |||||||||||||