YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 1.40 | 1.38 | 1.73 | 0.54 | 1.39 | 0.48 | 0.31 | 0.99 | 1.15 | 0.81 | 1.33 | 1.40 | 1.73 | |||||||||||||
1949 | 0.25 | 1.89 | 0.62 | 0.37 | 0.91 | 0.12 | 0.15 | 0.23 | 0.46 | 0.98 | 1.02 | 0.90 | 1.89 | |||||||||||||
1950 | 1.40 | 2.30 | 0.93 | 1.18 | 0.25 | 0.38 | 0.47 | 0.70 | 0.71 | 1.06 | 2.23 | 0.87 | 2.30 | |||||||||||||
1951 | 1.89 | 0.86 | 0.82 | 0.39 | 0.82 | 0.21 | 0.12 | 0.41 | 0.45 | 1.44 | 1.37 | 1.23 | 1.89 | |||||||||||||
1952 | 0.64 | 0.56 | 0.70 | 0.41 | 0.24 | 0.42 | 0.17 | 0.45 | 0.26 | 0.51 | 0.39 | 1.12 | 1.12 | |||||||||||||
1953 | 1.27 | 0.50 | 0.63 | 0.46 | 0.35 | 0.69 | 0.15 | 1.20 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||||||
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | 0.91 | 0.51 | 0.79 | 1.24 | 0.66 | 0.44 | 0.21 | 0.02 | 0.53 | 1.41 | b | 0.67 | a | 0.64 | 1.41 | c | ||||||||||
2001 | 0.32 | 0.41 | 0.61 | a | 0.58 | 0.41 | 0.55 | 0.26 | 0.59 | 0.57 | 0.58 | 1.37 | 1.49 | a | 1.49 | b | ||||||||||
2002 | 1.61 | 1.13 | 1.40 | 0.77 | a | 0.57 | 0.59 | a | 0.03 | a | 0.05 | 1.68 | 0.43 | 0.43 | 1.12 | 1.68 | c | |||||||||
2003 | 0.49 | b | 0.03 | c | 0.90 | 9.01 | 0.00 | a | 0.15 | 0.05 | 0.00 | a | 0.00 | 0.06 | e | 0.55 | a | 0.87 | 9.01 | m | ||||||
2004 | 1.67 | c | 0.35 | a | 0.00 | a | 0.00 | c | 0.00 | c | 0.00 | h | 0.01 | 0.00 | a | 0.00 | d | 0.00 | d | 0.36 | c | 0.47 | ----- | z | ||
2005 | 0.00 | i | 0.12 | a | 0.24 | h | 2.68 | n | 1.31 | 0.63 | 0.43 | 0.60 | 0.84 | 0.53 | 1.39 | b | 0.71 | ----- | z | |||||||
2006 | 1.83 | 0.65 | 0.78 | 0.85 | a | 0.66 | 0.63 | 0.22 | 0.37 | 0.80 | 0.52 | 2.60 | 1.17 | 2.60 | a | |||||||||||
2007 | 1.71 | a | 1.02 | 0.70 | 0.61 | 0.36 | 0.24 | 0.21 | 0.74 | 0.80 | b | 0.88 | 0.54 | 3.03 | 3.03 | c | ||||||||||
2008 | 0.87 | a | 1.12 | 0.72 | 0.25 | 0.29 | 0.60 | 0.10 | 0.45 | 0.20 | 0.58 | 3.06 | a | 0.74 | d | 3.06 | f | |||||||||
2009 | 2.75 | 0.35 | a | 0.61 | 0.78 | b | 0.52 | 0.37 | a | 0.06 | 0.28 | 0.28 | 0.40 | m | 1.29 | m | 0.85 | ----- | z | |||||||
2010 | 0.66 | 0.50 | a | 0.61 | f | 0.79 | a | 0.86 | 0.91 | d | 0.29 | 0.03 | 0.61 | f | 1.44 | c | 0.69 | a | 1.04 | c | 1.44 | y | ||||
2011 | 1.55 | 1.06 | 1.10 | a | 0.77 | 0.56 | 0.45 | 0.31 | 0.00 | 0.42 | 0.70 | 1.23 | b | 0.82 | 1.55 | c | ||||||||||
2012 | 1.16 | 1.26 | a | 1.95 | 0.40 | c | 0.67 | 0.72 | a | 0.15 | 0.00 | d | 0.03 | 0.97 | 1.56 | a | 1.52 | 1.95 | j | |||||||
2013 | 0.75 | a | 0.92 | 0.58 | a | 0.50 | 1.24 | 0.48 | e | 0.00 | 0.10 | a | 1.80 | 0.47 | 0.64 | 1.19 | a | 1.80 | i | |||||||
2014 | 0.78 | a | 1.03 | c | 1.48 | 1.07 | 1.11 | 0.83 | 0.54 | 0.48 | 0.82 | 1.25 | a | 0.95 | a | 1.57 | 1.57 | f | ||||||||
2015 | 2.10 | 1.10 | a | 1.32 | 0.37 | 0.50 | 0.54 | 0.07 | a | 0.02 | d | 0.00 | q | 0.41 | c | 0.95 | n | 1.46 | v | ----- | z | |||||
2016 | 0.02 | r | 0.01 | t | ----- | z | 0.00 | n | 0.00 | u | 0.01 | w | 0.02 | m | 0.12 | 0.50 | a | 1.45 | a | 1.66 | 1.31 | ----- | z | |||
2017 | 0.96 | 1.68 | 1.00 | a | 0.74 | a | 0.68 | 0.55 | 0.02 | 0.12 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||||
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.23 | 0.90 | 0.92 | 1.00 | 0.62 | 0.50 | 0.19 | 0.33 | 0.61 | 0.78 | 1.20 | 1.15 | 1.88 | |||||||||||||
S.D. | 0.63 | 0.56 | 0.45 | 1.81 | 0.38 | 0.21 | 0.15 | 0.34 | 0.49 | 0.44 | 0.75 | 0.53 | 0.56 | |||||||||||||
SKEW | 0.44 | 0.66 | 0.57 | 4.17 | 0.39 | -0.08 | 0.78 | 0.93 | 1.00 | 0.10 | 0.99 | 2.15 | 0.78 | |||||||||||||
MAX | 2.75 | 2.30 | 1.95 | 9.01 | 1.39 | 0.91 | 0.54 | 1.20 | 1.80 | 1.45 | 3.06 | 3.03 | 3.03 | |||||||||||||
MIN | 0.25 | 0.03 | 0.00 | 0.00 | 0.00 | 0.12 | 0.00 | 0.00 | 0.00 | 0.00 | 0.36 | 0.47 | 1.12 | |||||||||||||
YRS | 22 | 23 | 21 | 22 | 23 | 22 | 23 | 24 | 20 | 21 | 20 | 21 | 11 |