YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | 0.03 | i | 0.21 | 1.27 | 0.27 | 0.44 | 0.60 | 0.90 | 1.27 | 0.07 | 5.03 | d | ||||||||
1947 | 0.03 | 0.20 | 0.38 | 0.43 | 0.00 | 1.13 | 0.45 | 0.16 | 0.94 | 2.65 | 0.49 | 0.58 | a | 7.44 | ||||||||||||
1948 | 1.58 | 0.67 | ----- | z | ----- | z | ----- | z | 2.44 | 0.00 | 0.36 | 0.28 | 0.53 | 0.88 | 1.02 | 7.76 | c | |||||||||
1949 | 0.13 | 0.67 | 1.14 | 0.15 | 0.27 | 0.00 | 0.00 | 0.00 | 0.41 | 0.67 | 1.86 | 0.07 | 5.37 | |||||||||||||
1950 | 0.61 | 1.01 | 0.86 | 0.73 | 0.04 | 1.66 | 0.23 | 0.00 | 0.15 | 2.81 | a | 0.69 | 1.23 | 10.02 | ||||||||||||
1951 | 1.04 | 0.27 | 0.30 | 0.45 | 0.75 | 2.53 | 0.40 | 0.32 | 0.12 | 0.97 | 1.15 | 0.82 | 9.12 | |||||||||||||
1952 | 0.59 | 0.52 | 0.29 | 0.03 | 0.34 | 1.25 | 0.00 | 0.46 | 0.10 | 0.00 | 0.53 | 1.09 | 5.20 | |||||||||||||
1953 | 2.24 | 0.20 | 0.71 | 1.46 | 0.96 | 0.32 | 0.00 | 0.22 | 0.00 | 0.36 | 1.26 | 0.76 | 8.49 | |||||||||||||
1954 | 1.09 | 0.30 | 0.43 | 0.38 | 0.39 | 0.25 | 0.65 | 0.58 | 0.99 | 0.40 | 1.16 | 0.45 | 7.07 | |||||||||||||
1955 | 0.51 | 0.18 | 0.14 | 1.04 | 0.35 | 0.26 | 0.69 | 0.00 | 1.41 | 0.87 | 1.61 | 1.83 | 8.89 | |||||||||||||
1956 | 1.86 | 0.41 | 0.07 | 0.00 | 1.23 | 1.69 | 0.00 | 0.10 | 0.26 | 1.27 | 0.18 | 0.37 | 7.44 | |||||||||||||
1957 | 0.30 | 0.36 | 2.16 | 0.72 | 1.33 | 1.01 | 0.20 | 0.09 | 0.87 | 1.14 | 0.41 | 1.02 | 9.61 | |||||||||||||
1958 | 1.72 | 2.24 | 1.24 | 1.73 | 0.21 | 0.88 | 0.14 | 0.22 | 0.24 | 0.39 | 1.09 | 0.91 | 11.01 | |||||||||||||
1959 | 1.68 | 0.34 | 0.61 | 0.13 | 0.34 | 0.38 | 0.00 | 0.02 | 1.11 | 0.62 | 0.43 | 0.38 | 6.04 | |||||||||||||
1960 | 0.54 | 0.87 | 0.76 | 0.65 | 0.94 | 0.15 | 0.04 | 0.04 | 0.19 | 0.55 | 1.29 | 0.84 | 6.86 | |||||||||||||
1961 | 0.41 | 2.39 | 1.67 | 1.00 | 1.07 | 0.90 | 0.03 | 0.41 | 0.07 | 0.44 | 0.62 | 0.79 | 9.80 | |||||||||||||
1962 | 0.07 | 1.16 | 0.54 | 0.91 | 1.65 | 0.08 | 0.03 | 0.90 | 0.46 | 1.39 | 1.31 | 0.68 | 9.18 | |||||||||||||
1963 | 0.70 | 0.89 | 0.99 | 2.09 | 0.53 | 0.31 | 1.88 | 0.02 | 0.14 | 0.13 | 1.38 | 1.02 | 10.08 | |||||||||||||
1964 | 0.43 | 0.00 | 0.14 | 0.20 | 0.00 | 1.36 | 0.27 | 0.27 | 0.04 | 0.31 | 0.89 | 2.67 | 6.58 | |||||||||||||
1965 | 0.76 | 0.09 | 0.05 | 0.63 | 0.04 | 0.48 | 0.11 | 0.13 | 0.04 | 0.05 | 1.24 | b | 0.53 | 4.15 | ||||||||||||
1966 | 0.55 | 0.14 | 1.09 | 0.00 | 0.00 | 1.02 | 1.11 | 0.00 | 0.71 | 0.80 | 2.18 | 0.91 | 8.51 | |||||||||||||
1967 | 0.51 | 0.02 | 0.43 | 1.31 | 0.43 | 1.05 | 0.00 | 0.00 | 0.10 | 0.18 | 0.30 | 0.35 | 4.68 | |||||||||||||
1968 | 1.24 | 1.04 | 0.32 | 0.06 | 0.13 | 0.35 | 0.18 | 1.13 | 0.30 | 1.37 | 1.52 | 0.93 | 8.57 | |||||||||||||
1969 | 1.34 | 0.53 | 0.11 | 0.71 | 1.06 | 0.09 | 0.00 | 0.00 | 1.01 | 0.24 | 0.17 | 1.79 | 7.05 | |||||||||||||
1970 | 2.31 | 0.76 | 0.22 | 0.25 | 0.14 | 0.15 | 0.00 | 0.00 | 0.11 | 0.74 | 0.98 | 0.66 | 6.32 | |||||||||||||
1971 | 0.97 | 0.00 | 1.48 | 0.51 | 0.74 | 0.36 | 0.06 | 0.34 | 1.53 | 0.17 | 1.04 | 0.95 | 8.15 | |||||||||||||
1972 | 0.64 | 0.45 | 0.99 | 0.08 | 1.48 | 1.73 | 0.10 | 0.29 | 0.08 | 0.00 | 0.55 | 1.23 | 7.62 | |||||||||||||
1973 | 0.97 | 0.34 | 0.08 | 0.02 | 0.50 | 0.03 | 0.00 | 0.02 | 0.30 | 1.95 | 2.64 | 2.02 | 8.87 | |||||||||||||
1974 | 1.14 | 0.60 | 0.93 | 1.29 | 0.47 | 0.16 | 0.49 | 0.00 | 0.00 | 0.41 | 0.68 | 1.10 | 7.27 | |||||||||||||
1975 | 1.43 | 0.87 | 0.52 | 0.63 | 0.53 | 0.21 | 0.13 | 2.04 | 0.00 | 1.01 | 0.12 | q | 0.38 | 7.75 | a | |||||||||||
1976 | 0.33 | 0.50 | 0.58 | 0.64 | 0.16 | 0.00 | 0.24 | 4.20 | 0.07 | 0.04 | 0.03 | 0.12 | 6.91 | |||||||||||||
1977 | 0.08 | 0.68 | 0.25 | 0.00 | 0.90 | 0.44 | 0.00 | 1.33 | 1.29 | 0.31 | 0.49 | 2.35 | 8.12 | |||||||||||||
1978 | 2.01 | 1.30 | 0.56 | 1.13 | 0.34 | 0.36 | 0.97 | 0.95 | 0.18 | 0.00 | 0.69 | 0.00 | 8.49 | |||||||||||||
1979 | 1.03 | 0.29 | 0.33 | 0.38 | 0.04 | 0.03 | 0.05 | 0.50 | 0.40 | 0.94 | 1.33 | 0.86 | 6.18 | |||||||||||||
1980 | 1.49 | 1.73 | k | 0.44 | 1.37 | 1.24 | 1.59 | 0.00 | 0.10 | 0.63 | 0.27 | 0.76 | 1.97 | 9.86 | a | |||||||||||
1981 | 0.89 | 0.58 | ----- | z | 0.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.47 | i | |||
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.44 | 2.50 | 1.34 | 4.28 | i | |||
1984 | 0.10 | 0.62 | 1.76 | 1.00 | 0.60 | 0.84 | 0.06 | 0.01 | 0.46 | 0.28 | 2.07 | 0.10 | 7.90 | |||||||||||||
1985 | 0.17 | 0.35 | 0.45 | 0.04 | 0.55 | 0.39 | 0.25 | 0.01 | 1.07 | 0.35 | 0.82 | 0.84 | 5.29 | |||||||||||||
1986 | 1.90 | 1.00 | 0.61 | 0.28 | 0.92 | 0.13 | 0.20 | 0.04 | 1.23 | 0.35 | 0.47 | 0.78 | 7.91 | |||||||||||||
1987 | 0.87 | 0.34 | 2.18 | 0.44 | 0.37 | 0.17 | 0.52 | 0.26 | 0.00 | 0.00 | 0.37 | 2.64 | 8.16 | |||||||||||||
1988 | 0.61 | 0.00 | 0.34 | 1.28 | 0.38 | 1.14 | 0.03 | 0.00 | 0.22 | 0.03 | 1.49 | 0.43 | 5.95 | |||||||||||||
1989 | 0.24 | 0.93 | 1.61 | 0.96 | 0.84 | 0.25 | 0.01 | 0.27 | 0.01 | 0.67 | 0.99 | 0.30 | 7.08 | |||||||||||||
1990 | 1.63 | 0.03 | 0.30 | 0.25 | 1.67 | 0.35 | 0.14 | 1.60 | 0.04 | 0.51 | 0.00 | 0.44 | 6.96 | |||||||||||||
1991 | 0.26 | 0.42 | 1.09 | 0.54 | 0.51 | 4.15 | 0.22 | 0.14 | 0.00 | 0.64 | 1.59 | 0.44 | 10.00 | |||||||||||||
1992 | 0.20 | 1.05 | 0.25 | 1.34 | 0.14 | 1.14 | 1.42 | 0.58 | 0.38 | 0.65 | d | 1.10 | 0.90 | 9.15 | ||||||||||||
1993 | 0.62 | 0.51 | 0.60 | 0.78 | 0.45 | 0.73 | 0.71 | 0.05 | 0.16 | 0.09 | 0.17 | 0.96 | 5.83 | |||||||||||||
1994 | 0.38 | 0.48 | 0.05 | 1.02 | 1.07 | 0.41 | 0.06 | 0.10 | 0.33 | 1.94 | 0.69 | 1.05 | 7.58 | |||||||||||||
1995 | 2.89 | 0.17 | 1.43 | 2.51 | 0.84 | 0.54 | 0.68 | 0.23 | 1.20 | 0.78 | 1.33 | 2.44 | 15.04 | |||||||||||||
1996 | 1.21 | b | ----- | z | ----- | z | 0.39 | 0.91 | 0.10 | 0.12 | 0.06 | 0.62 | 1.21 | 1.89 | 3.27 | 9.78 | b | |||||||||
1997 | 1.36 | 0.23 | 0.52 | 0.47 | 1.32 | 0.78 | 0.29 | 0.12 | 0.79 | 1.80 | 0.78 | ----- | z | 8.46 | a | |||||||||||
1998 | 1.62 | b | 1.10 | 1.02 | ----- | z | 1.96 | 0.78 | 0.43 | 0.07 | 0.17 | 0.42 | 1.26 | 0.88 | 9.71 | a | ||||||||||
1999 | 0.87 | 0.94 | 0.10 | 0.17 | 0.51 | 0.08 | 0.52 | 0.78 | 0.00 | 0.49 | 0.53 | 0.41 | 5.40 | |||||||||||||
2000 | 1.14 | 1.00 | 0.64 | 0.55 | 1.61 | 0.04 | 0.00 | 0.00 | 0.31 | 0.53 | 0.90 | 0.50 | 7.22 | |||||||||||||
2001 | 0.41 | 0.22 | 0.48 | 0.67 | 0.14 | 1.71 | 0.00 | 0.37 | 0.22 | 0.39 | 2.31 | 0.65 | 7.57 | |||||||||||||
2002 | 0.24 | 0.47 | 0.04 | 0.33 | 0.95 | 0.82 | 0.03 | 0.00 | 0.01 | 0.15 | 0.47 | 2.32 | 5.83 | |||||||||||||
2003 | 1.95 | 0.58 | 0.21 | 2.61 | 0.07 | 0.00 | 0.00 | 0.41 | 0.03 | 0.21 | 0.18 | 1.57 | 7.82 | |||||||||||||
2004 | 1.06 | 0.87 | 0.47 | 0.51 | 0.56 | 0.80 | 0.30 | 0.87 | 0.08 | 0.85 | 0.11 | 0.59 | 7.07 | |||||||||||||
2005 | 0.31 | 0.03 | 0.39 | 1.04 | 1.12 | 0.07 | 0.08 | 0.09 | 0.11 | 0.79 | 1.14 | 1.92 | 7.09 | |||||||||||||
2006 | 1.20 | 0.71 | 0.24 | 1.11 | 1.39 | 0.86 | 0.00 | 0.01 | 0.14 | 0.45 | 0.70 | 1.88 | 8.69 | |||||||||||||
2007 | 0.30 | 0.45 | 0.36 | 0.61 | 0.79 | 0.49 | 0.02 | 0.18 | 0.42 | 0.52 | 1.41 | 0.61 | 6.16 | |||||||||||||
2008 | 0.93 | 0.12 | 0.24 | 0.13 | 0.44 | 0.32 | 0.16 | 0.21 | 0.19 | 0.38 | 1.07 | 0.84 | 5.03 | |||||||||||||
2009 | 0.78 | 0.47 | 0.72 | 0.09 | 0.48 | 0.09 | 0.12 | 0.24 | 0.50 | 1.04 | 0.75 | 0.39 | 5.67 | |||||||||||||
2010 | 1.65 | 0.93 | 0.16 | 0.44 | 1.15 | 1.13 | 0.07 | 0.03 | 0.52 | 0.83 | 0.80 | 2.00 | 9.71 | |||||||||||||
2011 | 0.80 | 0.05 | 1.31 | 0.44 | 1.94 | 0.66 | 0.34 | d | 0.00 | f | 0.03 | 1.07 | 0.36 | 0.30 | 7.30 | a | ||||||||||
2012 | 0.66 | 0.61 | 1.20 | 0.54 | 0.13 | 1.13 | r | ----- | z | 0.00 | 0.01 | 1.05 | d | 0.74 | 1.80 | 6.74 | b | |||||||||
2013 | 0.08 | 0.06 | 0.45 | 0.43 | 2.02 | 1.08 | 0.00 | 0.34 | 0.53 | 0.05 | a | 0.39 | 0.09 | 5.52 | ||||||||||||
2014 | 0.09 | 1.13 | 0.66 | 1.10 | 0.41 | 0.11 | 0.06 | 0.11 | 0.60 | 0.86 | 0.45 | b | 0.77 | 6.35 | ||||||||||||
2015 | 0.66 | 0.48 | a | 0.75 | 0.15 | 1.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.56 | 0.81 | 2.80 | 7.38 | ||||||||||||
2016 | 1.60 | 0.49 | 1.51 | 0.52 | 0.53 | 0.41 | 0.38 | 0.00 | 0.06 | 3.10 | 0.68 | 0.56 | 9.84 | |||||||||||||
2017 | 1.53 | b | 1.80 | 1.05 | d | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | m | 0.22 | 0.82 | 1.30 | 0.27 | 6.99 | e | |||||
2018 | 1.06 | 0.17 | 0.56 | 1.15 | 0.42 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.94 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.92 | 0.58 | 0.67 | 0.67 | 0.70 | 0.69 | 0.24 | 0.34 | 0.37 | 0.70 | 0.95 | 1.01 | 7.60 | |||||||||||||
S.D. | 0.64 | 0.48 | 0.52 | 0.57 | 0.53 | 0.73 | 0.35 | 0.62 | 0.40 | 0.64 | 0.59 | 0.75 | 1.85 | |||||||||||||
SKEW | 0.68 | 1.54 | 1.09 | 1.31 | 0.72 | 2.09 | 2.51 | 4.11 | 1.23 | 1.79 | 0.78 | 1.05 | 1.04 | |||||||||||||
MAX | 2.89 | 2.39 | 2.18 | 2.61 | 2.02 | 4.15 | 1.88 | 4.20 | 1.53 | 3.10 | 2.64 | 3.27 | 15.04 | |||||||||||||
MIN | 0.03 | 0.00 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 4.15 | |||||||||||||
YRS | 70 | 68 | 67 | 67 | 67 | 67 | 67 | 67 | 69 | 70 | 69 | 69 | 59 |