| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1942 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 | 0.41 | 0.43 | |||||||
| 1943 | 2.70 | 0.65 | 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 | 3.35 | |||
| 1944 | 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 | |
| 1945 | 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 | |
| 1946 | 0.02 | 0.03 | 0.22 | 0.06 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.98 | 0.17 | 1.42 | ||||||
| 1947 | 0.35 | 0.01 | 0.83 | 0.17 | 0.00 | 0.00 | 0.07 | 0.60 | 0.00 | 0.18 | 0.28 | 1.07 | 3.56 | |||||||||||||
| 1948 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.10 | 0.00 | 0.00 | 2.06 | 0.00 | 0.61 | 2.77 | |||||||
| 1949 | 2.35 | 0.13 | 0.31 | 0.00 | 0.00 | 0.00 | 0.00 | 0.05 | 0.00 | 0.30 | 0.03 | 0.64 | 3.81 | |||||||||||||
| 1950 | 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 | 0.64 | 0.00 | 0.64 | |||
| 1951 | 0.49 | 0.49 | 0.58 | 0.43 | 0.11 | 0.00 | 0.99 | 1.30 | 0.19 | 0.00 | 0.26 | 1.86 | 6.70 | |||||||||||||
| 1952 | 1.73 | 0.00 | 1.11 | 0.81 | 0.00 | 0.00 | 0.02 | 0.00 | 0.03 | 0.00 | 1.60 | 2.63 | 7.93 | |||||||||||||
| 1953 | 0.05 | 0.05 | 0.56 | 0.30 | 0.00 | 0.00 | 0.00 | 0.27 | 0.01 | 0.00 | 0.11 | 0.00 | 1.35 | |||||||||||||
| 1954 | 1.30 | 0.24 | 1.94 | 0.00 | 0.00 | 0.29 | 0.49 | 0.00 | 0.20 | 0.00 | 0.74 | 0.01 | 5.21 | |||||||||||||
| 1955 | 2.03 | 0.12 | 0.00 | 0.18 | 0.00 | 0.00 | 0.74 | 1.88 | 0.00 | 0.00 | 0.05 | 0.32 | 5.32 | |||||||||||||
| 1956 | 0.16 | 0.05 | 0.00 | 0.38 | 0.00 | f | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.65 | ||||||||||||
| 1957 | 2.59 | 0.09 | 0.11 | 0.00 | 0.02 | 0.00 | 0.02 | 0.00 | 0.00 | 0.49 | 0.01 | 0.31 | 3.64 | |||||||||||||
| 1958 | 0.13 | 2.57 | 1.85 | 1.41 | 0.12 | 0.00 | 0.48 | 0.65 | 0.00 | 0.00 | 0.10 | 0.00 | 7.31 | |||||||||||||
| 1959 | 0.20 | 3.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.40 | 0.00 | 0.28 | 0.04 | 1.72 | 6.31 | |||||||||||||
| 1960 | 1.07 | 1.31 | 0.00 | 0.10 | 0.00 | 0.00 | 0.00 | 0.45 | a | 0.51 | 0.00 | 0.90 | 0.00 | 4.34 | ||||||||||||
| 1961 | 0.40 | 0.00 | 0.26 | 0.00 | 0.06 | 0.00 | 0.00 | 0.50 | 0.00 | d | 0.03 | 0.13 | 0.81 | b | 2.19 | |||||||||||
| 1962 | 1.11 | 1.55 | 0.32 | 0.00 | f | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | a | 0.14 | 0.00 | 0.50 | 3.62 | |||||||||||
| 1963 | 0.10 | 0.89 | 0.78 | 0.54 | 0.00 | 0.00 | 0.00 | 0.88 | 1.38 | 1.98 | 0.30 | 0.00 | 6.85 | |||||||||||||
| 1964 | 0.47 | 0.33 | 1.19 | 0.09 | 0.03 | 0.00 | 0.03 | 0.29 | 0.19 | 0.35 | 1.16 | 0.28 | 4.41 | |||||||||||||
| 1965 | 0.05 | 0.07 | 0.04 | 0.98 | 0.00 | 0.00 | 0.58 | 0.71 | 0.00 | 0.00 | 3.63 | 1.98 | 8.04 | |||||||||||||
| 1966 | 0.49 | 0.12 | 0.46 | 0.00 | 0.00 | 0.00 | 1.26 | 0.00 | 0.03 | 0.62 | 0.83 | 1.27 | 5.08 | |||||||||||||
| 1967 | 0.24 | 0.00 | 0.00 | 0.59 | 0.00 | 0.00 | 0.14 | 1.85 | 0.28 | 0.00 | 0.82 | 1.99 | 5.91 | |||||||||||||
| 1968 | 0.00 | 0.04 | 0.59 | 0.81 | 0.04 | 0.00 | 0.57 | 0.00 | 0.00 | 0.44 | 0.03 | 0.67 | 3.19 | |||||||||||||
| 1969 | 2.39 | 0.97 | 0.37 | 0.05 | 0.35 | 0.00 | 0.06 | 0.02 | 0.35 | 0.00 | 1.25 | 0.01 | 5.82 | |||||||||||||
| 1970 | 0.00 | 0.53 | 1.38 | 0.36 | 0.00 | 0.00 | 0.31 | 1.12 | 0.00 | 0.02 | 0.58 | 1.43 | 5.73 | |||||||||||||
| 1971 | 0.23 | 0.11 | 0.07 | 0.00 | 0.19 | 0.00 | 0.00 | 0.60 | 0.19 | 0.16 | 0.00 | 0.85 | 2.40 | |||||||||||||
| 1972 | 0.00 | 0.00 | 0.00 | 0.05 | 0.00 | 0.20 | 0.03 | 0.40 | 0.00 | 0.55 | 1.56 | 0.65 | 3.44 | |||||||||||||
| 1973 | 0.48 | 1.17 | 0.80 | 0.00 | 0.00 | 0.00 | 0.00 | 0.62 | 0.00 | 0.00 | 0.18 | 0.00 | 3.25 | |||||||||||||
| 1974 | 3.38 | 0.00 | 0.39 | 0.00 | 0.23 | 0.00 | 0.30 | 0.95 | 0.04 | 0.91 | 0.00 | 1.53 | 7.73 | |||||||||||||
| 1975 | 0.05 | 0.30 | 0.28 | 1.01 | 0.02 | 0.00 | 0.56 | 0.03 | 1.53 | 0.08 | 1.08 | 0.07 | 5.01 | |||||||||||||
| 1976 | 0.20 | 3.14 | 0.73 | 0.27 | 0.22 | 0.00 | 0.17 | 0.00 | 4.40 | 0.19 | 0.22 | 0.17 | 9.71 | |||||||||||||
| 1977 | 1.13 | 0.07 | 1.14 | 0.00 | 0.05 | 0.04 | 0.00 | 3.61 | 0.00 | 0.15 | 0.00 | 1.61 | 7.80 | |||||||||||||
| 1978 | 4.44 | 1.82 | 2.79 | 0.22 | 0.00 | 0.00 | 0.00 | 0.00 | 0.53 | 0.30 | 1.96 | 1.91 | 13.97 | |||||||||||||
| 1979 | 3.28 | 1.95 | 0.93 | 0.00 | 0.06 | 0.00 | 1.37 | 0.53 | 0.00 | 0.03 | 0.05 | 0.09 | 8.29 | |||||||||||||
| 1980 | 4.35 | 6.58 | 1.41 | 0.28 | 1.04 | 0.00 | 0.33 | 0.00 | 0.00 | 0.22 | 0.00 | 0.06 | 14.27 | |||||||||||||
| 1981 | 0.80 | 1.40 | 2.02 | 0.00 | 0.20 | 0.00 | 0.00 | 0.20 | 0.54 | 0.00 | 0.54 | 0.04 | 5.74 | |||||||||||||
| 1982 | 2.36 | 1.12 | 1.12 | 0.50 | 0.00 | 0.00 | 0.62 | 0.27 | 0.67 | 0.07 | 0.71 | 3.97 | 11.41 | |||||||||||||
| 1983 | 1.53 | 2.96 | 4.52 | 0.22 | 0.00 | 0.00 | 0.03 | 5.07 | 2.35 | 0.32 | 0.27 | 1.46 | 18.73 | |||||||||||||
| 1984 | 0.12 | 0.03 | 0.00 | 0.05 | 0.15 | 0.00 | 1.50 | 0.63 | 0.22 | 0.00 | 1.51 | 2.48 | 6.69 | |||||||||||||
| 1985 | 0.38 | 0.50 | 0.15 | 0.00 | 0.00 | 0.00 | 0.20 | 0.01 | 0.30 | 0.00 | 2.81 | 0.78 | 5.13 | |||||||||||||
| 1986 | 0.19 | 2.06 | 1.57 | 0.06 | 0.00 | 0.00 | 0.91 | 0.42 | 0.06 | 0.95 | 0.02 | 0.13 | 6.37 | |||||||||||||
| 1987 | 0.50 | 1.03 | 0.86 | 0.00 | 0.00 | 0.00 | 0.06 | 0.01 | 0.00 | 1.69 | 1.13 | 0.76 | 6.04 | |||||||||||||
| 1988 | 1.35 | 0.92 | 0.00 | 0.74 | 0.00 | 0.00 | 0.18 | 0.40 | 0.00 | 0.00 | 0.00 | 0.17 | 3.76 | |||||||||||||
| 1989 | 0.79 | 0.55 | 0.05 | a | 0.00 | 0.00 | 0.00 | 0.69 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 2.12 | ||||||||||||
| 1990 | 0.36 | 0.15 | 0.13 | 0.12 | 0.01 | 0.23 | 0.70 | 0.96 | 0.05 | 0.12 | 0.00 | 0.06 | 2.89 | |||||||||||||
| 1991 | 0.70 | 3.96 | 1.88 | 0.00 | 0.00 | 0.00 | 0.25 | 0.49 | 0.79 | 0.00 | 0.00 | 1.32 | 9.39 | |||||||||||||
| 1992 | 0.60 | 3.05 | 2.55 | 0.67 | 0.25 | 0.00 | 0.08 | 0.05 | 0.00 | 0.51 | 0.00 | 2.35 | 10.11 | |||||||||||||
| 1993 | 8.78 | 1.89 | 0.01 | 0.00 | 0.06 | 0.00 | 0.00 | 0.35 | 0.00 | 0.00 | 0.40 | 0.05 | 11.54 | |||||||||||||
| 1994 | 0.70 | 1.59 | 0.88 | a | 0.00 | 0.20 | 0.00 | 0.00 | 0.58 | 0.00 | 0.00 | 0.04 | 0.39 | 4.38 | ||||||||||||
| 1995 | 3.32 | 0.22 | 1.61 | 0.47 | 0.02 | 0.00 | 0.01 | 0.30 | 0.10 | 0.00 | 0.00 | 0.20 | 6.25 | |||||||||||||
| 1996 | 0.81 | 0.75 | a | 0.45 | 0.00 | 0.00 | 0.00 | 0.06 | 0.00 | 0.06 | 0.01 | 0.24 | 0.17 | 2.55 | ||||||||||||
| 1997 | 1.19 | a | 0.09 | 0.02 | 0.14 | 0.13 | 0.11 | 0.43 | 0.00 | 2.28 | 0.06 | 0.47 | 0.79 | 5.71 | ||||||||||||
| 1998 | 0.78 | 3.73 | 1.14 | 0.08 | 0.10 | 0.00 | 0.04 | 0.11 | 0.22 | 0.00 | 0.04 | 0.37 | 6.61 | |||||||||||||
| 1999 | 0.05 | 0.49 | 0.11 | 0.93 | 0.00 | 0.00 | 1.34 | 0.00 | 0.58 | 0.00 | 0.00 | 0.06 | 3.56 | |||||||||||||
| 2000 | 0.01 | 0.75 | 0.57 | 0.00 | 0.00 | 0.00 | 0.00 | 1.07 | 0.08 | 0.02 | 0.00 | 0.00 | 2.50 | |||||||||||||
| 2001 | 0.40 | 2.63 | 0.86 | 0.23 | 0.00 | 0.00 | 0.89 | 0.00 | 0.00 | 0.00 | 0.18 | 0.21 | 5.40 | |||||||||||||
| 2002 | 0.01 | 0.00 | 0.28 | 0.09 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.24 | 0.76 | 1.55 | |||||||||||||
| 2003 | 0.14 | 1.49 | 0.40 | 0.19 | 0.00 | 0.00 | 0.17 | 1.45 | 0.02 | 0.00 | 0.52 | 0.29 | 4.67 | |||||||||||||
| 2004 | 0.04 | 1.34 | 0.19 | 0.11 | 0.00 | 0.00 | 0.00 | 0.00 | 0.73 | 1.76 | 0.95 | i | 2.65 | 6.82 | ||||||||||||
| 2005 | 2.11 | 3.97 | 0.14 | 0.00 | 0.00 | 0.00 | 0.42 | 2.00 | 0.07 | 2.04 | b | 0.00 | 0.00 | 10.75 | ||||||||||||
| 2006 | 0.02 | 0.15 | 0.00 | z | 0.39 | 0.00 | 0.22 | 0.09 | 0.00 | 0.00 | 0.00 | 0.00 | 0.23 | 1.10 | ||||||||||||
| 2007 | 0.00 | 0.04 | 0.38 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.02 | 0.00 | 0.10 | 0.81 | 1.52 | |||||||||||||
| 2008 | 2.27 | 1.06 | 0.08 | 0.00 | 0.05 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.07 | d | 2.61 | 6.47 | ||||||||||||
| 2009 | 0.02 | 1.44 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 1.54 | 3.12 | |||||||||||||
| 2010 | 4.95 | 0.78 | 0.12 | 0.13 | 0.02 | 0.00 | 0.34 | 0.00 | 0.03 | 2.23 | 0.00 | 2.65 | 11.25 | |||||||||||||
| 2011 | 0.03 | a | 1.88 | c | 0.17 | a | 0.00 | a | 0.00 | 0.00 | 0.36 | 0.00 | a | 0.50 | 0.00 | 0.55 | 0.00 | z | 3.49 | |||||||
| 2012 | 0.04 | 0.50 | 1.03 | 0.33 | 0.00 | 0.00 | 0.29 | 1.14 | 0.00 | 0.00 | 0.00 | 0.29 | 3.62 | |||||||||||||
| 2013 | 0.84 | 0.18 | 0.11 | 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 | 1.13 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.11 | 1.06 | 0.69 | 0.23 | 0.06 | 0.02 | 0.28 | 0.51 | 0.30 | 0.29 | 0.44 | 0.80 | 6.07 | |||||||||||||
| S.D. | 1.54 | 1.29 | 0.83 | 0.32 | 0.15 | 0.06 | 0.38 | 0.86 | 0.70 | 0.57 | 0.69 | 0.91 | 3.44 | |||||||||||||
| SKEW | 2.50 | 1.81 | 2.11 | 1.67 | 4.94 | 3.48 | 1.55 | 3.25 | 3.93 | 2.33 | 2.46 | 1.29 | 1.30 | |||||||||||||
| MAX | 8.78 | 6.58 | 4.52 | 1.41 | 1.04 | 0.29 | 1.50 | 5.07 | 4.40 | 2.23 | 3.63 | 3.97 | 18.73 | |||||||||||||
| MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.35 | |||||||||||||
| NO YRS | 67 | 67 | 65 | 63 | 63 | 64 | 66 | 66 | 66 | 66 | 67 | 67 | 59 | |||||||||||||