YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.70 | o | 0.95 | 0.75 | 2.40 | 0.35 | 0.57 | ----- | z | |||||
1940 | 1.10 | v | 0.38 | 0.35 | v | 1.01 | 0.15 | 0.45 | 0.70 | 0.73 | v | 1.60 | 0.90 | 1.60 | w | 0.85 | ----- | z | ||||||||
1941 | ----- | z | 0.88 | 0.88 | 0.50 | 0.48 | 0.93 | 0.60 | 0.22 | 0.62 | 0.86 | 0.43 | 0.97 | ----- | z | |||||||||||
1942 | 0.54 | v | 1.23 | 0.43 | 0.40 | 0.50 | 0.27 | 0.65 | 0.69 | 2.02 | 0.76 | 0.26 | 0.44 | 2.02 | v | |||||||||||
1943 | 0.28 | 0.55 | 0.19 | 0.60 | 0.23 | 0.30 | 1.79 | ----- | z | ----- | z | ----- | z | 0.39 | 1.20 | j | ----- | z | ||||||||
1944 | 0.80 | 0.45 | 0.54 | 0.26 | y | 1.07 | 0.59 | 0.85 | 0.67 | 1.13 | 0.52 | 0.61 | 0.34 | 1.13 | y | |||||||||||
1945 | 0.16 | q | 1.11 | 0.39 | 0.45 | 0.36 | 1.00 | 0.98 | 1.57 | 0.98 | 0.85 | 0.51 | 0.72 | a | 1.57 | r | ||||||||||
1946 | 0.46 | 0.18 | 1.55 | 0.40 | 0.42 | 0.81 | 0.46 | 0.64 | 0.55 | 0.70 | 0.62 | 0.73 | 1.55 | |||||||||||||
1947 | 0.88 | 0.80 | 0.40 | 0.36 | a | 0.78 | 0.32 | 0.96 | 1.00 | 1.79 | 1.51 | 1.58 | a | 1.44 | 1.79 | b | ||||||||||
1948 | 1.01 | 1.24 | 0.55 | 0.14 | 0.49 | 0.28 | 0.92 | 0.52 | 1.25 | 1.11 | 1.04 | 0.50 | 1.25 | |||||||||||||
1949 | 0.86 | 0.12 | 0.38 | 0.41 | 0.34 | 0.87 | a | 0.45 | 0.63 | 1.44 | 0.71 | 1.60 | 0.77 | 1.60 | a | |||||||||||
1950 | 0.55 | 0.00 | 0.09 | 0.09 | 0.33 | 1.06 | 0.54 | 0.30 | 0.91 | 0.58 | 0.12 | 0.55 | 1.06 | |||||||||||||
1951 | 1.32 | 0.71 | 0.45 | 0.19 | 0.31 | 0.32 | 0.67 | 0.42 | 0.90 | 0.97 | 1.56 | 0.55 | 1.56 | |||||||||||||
1952 | 0.60 | 0.46 | 0.25 | 0.77 | 0.34 | 0.07 | 0.54 | 0.79 | 0.95 | 1.06 | 0.93 | 0.32 | 1.06 | |||||||||||||
1953 | 0.09 | 0.97 | 0.02 | 0.14 | 0.63 | 0.23 | 0.60 | 0.92 | 0.72 | 0.58 | 0.20 | 0.72 | 0.97 | |||||||||||||
1954 | 1.05 | 0.24 | 0.61 | 0.08 | 0.29 | 0.58 | 0.56 | 0.98 | 0.76 | 0.72 | 0.20 | 1.01 | 1.05 | |||||||||||||
1955 | 1.28 | 0.62 | 0.62 | 0.63 | 0.15 | 1.18 | 0.92 | 0.88 | 0.77 | 0.32 | 0.47 | 0.32 | 1.28 | |||||||||||||
1956 | 1.11 | 0.41 | 0.82 | 0.33 | 0.34 | 0.40 | 0.83 | 0.75 | 0.63 | 0.50 | 1.87 | 0.10 | 1.87 | |||||||||||||
1957 | 0.65 | 0.85 | 0.30 | 0.07 | 0.06 | 0.10 | 0.48 | 1.44 | 0.92 | 0.89 | 0.57 | 0.40 | 1.44 | |||||||||||||
1958 | 0.37 | 0.16 | 0.24 | 0.05 | 0.54 | 0.75 | 0.99 | 0.93 | 1.20 | 1.10 | 0.86 | 0.43 | 1.20 | |||||||||||||
1959 | 0.93 | 0.34 | l | ----- | 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 | 0.62 | 0.36 | 0.62 | ----- | z | |||
1971 | 0.51 | 0.64 | 0.37 | 0.38 | 0.67 | e | 0.82 | c | 0.52 | 0.61 | 0.55 | e | 0.75 | 0.41 | 2.80 | 2.80 | m | |||||||||
1972 | 0.22 | 0.24 | 0.29 | 0.32 | 0.43 | 0.51 | h | 0.37 | 0.14 | v | 1.04 | 0.88 | 0.27 | 0.35 | ----- | z | ||||||||||
1973 | 0.29 | 0.05 | 0.20 | 0.25 | 0.48 | 0.75 | 0.42 | 0.85 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||||||
1974 | ----- | z | ----- | z | ----- | z | 0.13 | 0.30 | 0.15 | 0.58 | 1.10 | e | ----- | z | ----- | z | 0.60 | n | 0.33 | g | ----- | z | ||||
1975 | 0.85 | i | 0.72 | d | 0.30 | ----- | z | 0.27 | 1.10 | i | 0.95 | 1.10 | j | 1.08 | j | 0.68 | s | ----- | 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 | 0.76 | a | ----- | z |
1979 | 0.61 | 0.00 | 0.65 | 0.35 | 0.32 | 0.53 | 0.83 | b | 0.52 | a | 1.21 | 0.97 | a | 1.56 | b | 0.24 | j | 1.56 | p | |||||||
1980 | 0.95 | g | 0.68 | 0.48 | a | 0.66 | 0.79 | 1.08 | 0.95 | 1.12 | 0.54 | 0.78 | 0.27 | 2.00 | 2.00 | h | ||||||||||
1981 | 0.73 | a | 0.51 | b | 0.33 | 0.16 | 0.22 | 0.65 | 0.69 | t | 0.18 | t | 0.51 | 1.91 | a | 0.76 | 0.43 | ----- | z | |||||||
1982 | 0.30 | 0.41 | 0.55 | 0.16 | a | 0.25 | 0.36 | 0.59 | 0.50 | 1.73 | 0.90 | 0.42 | b | 1.28 | b | 1.73 | e | |||||||||
1983 | 0.15 | 0.23 | 0.00 | 0.63 | 0.49 | 0.81 | 0.26 | 1.03 | d | 0.72 | c | 1.63 | 1.21 | 0.27 | 1.63 | g | ||||||||||
1984 | 0.78 | 1.00 | d | 0.16 | 0.23 | ----- | z | 0.50 | g | ----- | z | ----- | z | ----- | z | ----- | z | 0.62 | 0.89 | ----- | z | |||||
1985 | 1.10 | 0.80 | 0.69 | 0.36 | 0.33 | b | 0.25 | 0.60 | 1.18 | 1.27 | 0.70 | 0.44 | a | 0.78 | 1.27 | c | ||||||||||
1986 | 0.39 | a | 1.05 | 0.00 | 0.25 | 0.74 | 0.17 | a | 0.73 | 0.77 | 1.54 | 4.87 | 1.46 | b | 1.79 | 4.87 | d | |||||||||
1987 | 0.84 | a | 1.32 | 0.00 | 0.24 | a | 0.74 | e | 0.48 | 1.05 | 0.57 | a | 1.15 | a | 1.47 | 1.05 | 1.12 | a | 1.47 | j | ||||||
1988 | 0.23 | a | 0.73 | a | 0.25 | 0.24 | a | 0.42 | c | 0.65 | 0.32 | 0.50 | 0.59 | 0.87 | b | 0.22 | 0.97 | a | 0.97 | i | ||||||
1989 | 1.34 | 0.66 | 0.29 | 0.98 | 0.33 | 0.40 | 0.91 | 1.37 | 1.09 | 2.08 | 1.28 | a | 1.44 | 2.08 | a | |||||||||||
1990 | 1.67 | a | 1.54 | a | ----- | z | 0.41 | a | 0.11 | 0.63 | 1.07 | 0.66 | c | 1.12 | b | 1.07 | 0.44 | a | 0.49 | b | ----- | z | ||||
1991 | 0.46 | a | 0.85 | a | 0.42 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | 0.49 | e | 0.98 | 0.62 | 0.06 | v | 0.00 | 0.21 | 0.57 | d | 0.52 | 2.23 | ----- | z | ----- | z | ----- | z | ----- | z | ||||||
1993 | 0.50 | g | 1.59 | b | 0.31 | a | 0.00 | l | 0.29 | g | 0.27 | 0.21 | a | 1.19 | b | 1.24 | a | 0.85 | a | 0.49 | 0.58 | a | ----- | z | ||
1994 | 0.55 | a | 0.38 | 0.60 | a | 0.25 | a | 0.11 | d | 0.46 | 0.33 | f | 0.31 | 1.27 | 0.68 | 2.30 | 1.76 | a | 2.30 | n | ||||||
1995 | 0.46 | c | 0.24 | c | 0.41 | 0.35 | 1.52 | 0.22 | 0.46 | 0.23 | 0.68 | b | 0.58 | 0.69 | a | 0.42 | c | 1.52 | l | |||||||
1996 | 0.00 | 0.59 | b | 0.20 | 0.16 | 0.53 | 0.44 | 0.42 | 1.48 | 0.96 | 0.96 | 0.53 | 0.66 | a | 1.48 | c | ||||||||||
1997 | 0.41 | a | 0.40 | b | 0.44 | 0.20 | 0.49 | 0.69 | 0.46 | 1.35 | 0.92 | 0.36 | a | 0.58 | b | 0.40 | c | 1.35 | i | |||||||
1998 | 0.11 | c | 0.44 | 0.25 | a | 1.05 | 0.50 | 0.77 | 0.46 | 1.40 | 0.68 | 0.48 | 0.40 | 1.00 | b | 1.40 | f | |||||||||
1999 | 1.16 | b | 0.10 | a | 0.39 | 0.69 | b | 0.36 | 1.03 | 0.44 | 1.03 | 0.68 | 1.54 | 0.35 | 3.71 | 3.71 | e | |||||||||
2000 | 1.49 | a | 1.65 | a | 0.56 | 0.08 | 0.08 | 0.55 | 0.76 | 0.45 | a | 0.61 | 0.89 | 1.08 | a | 0.50 | 1.65 | d | ||||||||
2001 | 0.46 | 0.84 | d | 0.48 | 1.26 | a | 0.12 | 0.43 | 0.64 | a | 0.44 | 0.73 | 0.78 | a | 0.21 | 0.36 | d | 1.26 | k | |||||||
2002 | 0.83 | 0.73 | 0.24 | 0.28 | 0.29 | 0.19 | 0.27 | 0.95 | 0.88 | a | 0.88 | 0.44 | 0.37 | b | 0.95 | c | ||||||||||
2003 | 0.60 | d | 1.66 | 0.39 | a | 0.18 | a | 0.58 | 0.55 | e | 0.48 | 1.90 | 0.77 | 1.74 | 0.80 | c | 0.68 | a | 1.90 | o | ||||||
2004 | 0.40 | a | 0.48 | b | 0.58 | a | 0.45 | a | 0.14 | 0.73 | 0.61 | 1.90 | 1.29 | 0.94 | a | 1.74 | 1.37 | a | 1.90 | g | ||||||
2005 | 1.02 | 0.89 | a | 0.32 | 1.10 | a | 0.19 | 0.31 | d | 0.34 | i | 0.74 | 1.52 | 0.95 | 0.40 | 0.68 | 1.52 | o | ||||||||
2006 | 1.20 | 0.73 | b | 0.41 | 0.57 | a | 0.23 | 0.57 | j | 0.21 | 1.07 | 0.72 | 1.17 | a | 0.11 | 0.24 | a | 1.20 | o | |||||||
2007 | 0.73 | a | 0.04 | 0.10 | 0.07 | 0.27 | 0.38 | 0.64 | 0.78 | 1.23 | 0.60 | 0.68 | 1.39 | 1.39 | a | |||||||||||
2008 | 0.80 | c | 0.69 | 0.88 | a | 0.49 | a | 0.11 | 0.41 | 0.78 | 0.29 | b | 0.55 | 3.17 | 0.54 | a | 0.38 | 3.17 | h | |||||||
2009 | 1.60 | a | 0.40 | 0.27 | a | 0.16 | a | 0.36 | 0.13 | 1.45 | 0.75 | 0.50 | 0.94 | a | 0.35 | 2.38 | 2.38 | d | ||||||||
2010 | 0.39 | a | 1.33 | 0.50 | ----- | z | 0.22 | 0.46 | c | 0.88 | 0.99 | b | 0.76 | 0.77 | a | 0.55 | 1.28 | ----- | z | |||||||
2011 | 0.35 | t | 1.04 | 0.05 | 1.08 | h | 0.10 | 0.36 | b | 0.54 | 0.90 | c | 0.44 | 0.85 | 0.58 | 1.85 | ----- | z | ||||||||
2012 | 0.83 | 0.70 | m | 0.26 | b | 0.39 | u | 0.23 | q | 0.38 | m | 0.87 | l | 0.74 | m | 3.26 | h | 0.61 | 0.35 | 0.49 | ----- | z | ||||
2013 | 1.03 | 0.27 | f | 0.53 | 0.25 | s | 0.82 | c | 0.21 | 0.90 | 0.85 | b | 0.88 | o | 3.82 | i | 1.42 | 0.29 | b | ----- | z | |||||
2014 | 1.21 | a | 0.32 | 0.32 | 0.52 | ----- | z | ----- | z | 0.72 | 0.63 | b | ----- | z | 0.97 | 0.21 | a | 0.60 | b | ----- | z | |||||
2015 | 0.22 | 0.50 | a | 0.37 | d | 0.25 | 0.92 | 0.38 | a | 0.90 | 1.75 | i | 0.88 | 0.96 | 1.48 | a | 0.52 | 1.75 | p | |||||||
2016 | 0.17 | 0.13 | 0.64 | 0.30 | 0.42 | 0.66 | 0.82 | d | ----- | z | 1.95 | j | ----- | z | ----- | z | ----- | z | ----- | z | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.70 | 0.66 | 0.40 | 0.39 | 0.40 | 0.51 | 0.68 | 0.85 | 0.99 | 1.06 | 0.72 | 0.87 | 1.61 | |||||||||||||
S.D. | 0.41 | 0.43 | 0.26 | 0.29 | 0.27 | 0.28 | 0.29 | 0.40 | 0.41 | 0.73 | 0.52 | 0.68 | 0.83 | |||||||||||||
SKEW | 0.42 | 0.55 | 1.49 | 1.26 | 1.52 | 0.55 | 1.15 | 0.68 | 1.02 | 3.24 | 1.12 | 2.02 | 3.00 | |||||||||||||
MAX | 1.67 | 1.66 | 1.55 | 1.26 | 1.52 | 1.18 | 1.79 | 1.90 | 2.23 | 4.87 | 2.30 | 3.71 | 4.87 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.05 | 0.00 | 0.07 | 0.21 | 0.22 | 0.44 | 0.32 | 0.11 | 0.10 | 0.95 | |||||||||||||
YRS | 54 | 59 | 58 | 53 | 57 | 55 | 56 | 52 | 53 | 55 | 57 | 57 | 21 |