YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | 0.36 | 0.86 | 0.22 | 0.03 | 0.08 | 0.11 | 0.00 | 0.62 | ----- | z | ||||||||
1937 | 0.70 | 1.30 | o | 0.35 | 0.73 | 0.18 | 0.59 | 0.27 | 0.18 | 0.02 | 0.70 | 1.50 | 2.29 | 2.29 | o | |||||||||||
1938 | 1.70 | 0.59 | 1.31 | 0.52 | 0.52 | 0.62 | 0.20 | 0.10 | 0.23 | 0.88 | 1.72 | 0.60 | 1.72 | |||||||||||||
1939 | 0.98 | 1.06 | 0.73 | 0.46 | 0.85 | 0.16 | 0.50 | 0.00 | 0.50 | 0.78 | 0.10 | 0.58 | 1.06 | |||||||||||||
1940 | 1.04 | ----- | z | 1.41 | y | 0.72 | 0.16 | 0.33 | 0.26 | 0.00 | 1.32 | 0.58 | 0.63 | 0.57 | ----- | z | ||||||||||
1941 | 0.95 | ----- | z | 0.78 | 0.46 | 0.68 | ----- | z | 0.04 | 0.44 | 0.42 | 0.60 | 0.50 | 0.80 | a | ----- | z | |||||||||
1942 | 0.62 | 0.90 | 0.38 | 1.00 | 0.55 | 0.18 | ----- | z | 0.08 | 0.28 | 0.85 | 1.10 | 0.93 | ----- | z | |||||||||||
1943 | 1.25 | v | 0.82 | 0.40 | 0.70 | 0.77 | 0.36 | 0.60 | 0.26 | 0.00 | 0.54 | 0.85 | 0.38 | 1.25 | v | |||||||||||
1944 | 0.60 | 0.48 | 0.33 | 0.85 | 0.70 | 0.63 | 0.00 | 0.04 | 0.02 | 0.46 | 0.83 | 0.25 | 0.85 | |||||||||||||
1945 | 0.65 | 1.47 | r | 0.57 | 0.18 | 1.10 | 0.83 | 0.06 | 0.05 | 0.25 | ----- | z | 1.23 | q | 1.73 | ----- | z | |||||||||
1946 | 0.77 | ----- | z | ----- | z | 0.08 | ----- | z | ----- | z | 0.18 | 0.00 | 0.25 | ----- | z | ----- | z | 0.58 | ----- | z | ||||||
1947 | ----- | z | ----- | z | ----- | z | 0.37 | 0.49 | 0.59 | 0.00 | 0.00 | 0.30 | ----- | z | 0.63 | u | 0.12 | ----- | z | |||||||
1948 | 0.60 | 1.06 | 0.53 | 0.43 | 0.65 | 0.67 | 0.11 | 0.21 | 0.28 | 0.67 | 0.38 | q | 0.40 | l | ----- | z | ||||||||||
1949 | 0.30 | 1.80 | e | 0.10 | 0.18 | 0.62 | 0.15 | 0.02 | 0.00 | a | 0.17 | a | 0.27 | 0.80 | 0.45 | 1.80 | g | |||||||||
1950 | 0.52 | 0.60 | 1.00 | 0.56 | 0.29 | 0.72 | 0.00 | 0.06 | 0.16 | 0.37 | c | 0.10 | k | 0.83 | 1.00 | n | ||||||||||
1951 | 0.50 | a | 0.71 | e | 0.53 | 1.58 | 0.54 | 0.37 | 0.88 | 0.54 | 0.60 | 0.73 | a | 0.40 | b | 1.62 | 1.62 | i | ||||||||
1952 | 0.91 | 1.09 | 0.32 | 0.41 | 0.15 | i | 0.47 | h | 0.56 | 0.09 | 0.21 | 0.00 | c | 0.66 | 1.22 | 1.22 | t | |||||||||
1953 | 1.01 | a | 0.75 | 0.82 | d | 0.89 | 0.83 | 0.57 | 0.00 | 0.36 | 0.00 | 0.20 | 0.42 | 0.52 | 1.01 | e | ||||||||||
1954 | 0.45 | 0.41 | a | 0.63 | 0.59 | 0.14 | d | 1.46 | 0.24 | 0.40 | 0.59 | a | 0.16 | a | 0.66 | 1.08 | 1.46 | g | ||||||||
1955 | 0.31 | a | 0.59 | b | 0.29 | t | 0.49 | 0.09 | 0.30 | 0.37 | 0.00 | 1.25 | b | 0.34 | 0.73 | 0.60 | 1.25 | y | ||||||||
1956 | 0.59 | 0.35 | 0.62 | 1.95 | 0.55 | 0.75 | 0.50 | 0.95 | 0.18 | 0.40 | a | 0.27 | 1.31 | 1.95 | a | |||||||||||
1957 | 0.79 | 1.11 | 0.63 | a | 0.55 | 0.67 | 0.44 | 0.10 | 0.12 | 0.12 | 0.41 | 0.93 | a | 1.20 | 1.20 | b | ||||||||||
1958 | 1.10 | 0.90 | 0.66 | 0.45 | 1.58 | 0.62 | 0.12 | 0.16 | 0.55 | 0.18 | 0.62 | 0.90 | 1.58 | |||||||||||||
1959 | 1.05 | 0.66 | 0.66 | 0.59 | 1.41 | 0.15 | 0.06 | 0.23 | 1.57 | 0.88 | 0.98 | 0.78 | 1.57 | |||||||||||||
1960 | 0.35 | 0.55 | 0.38 | 0.26 | 0.34 | 0.10 | 0.25 | 1.00 | 0.45 | a | 0.33 | 0.83 | 1.11 | 1.11 | a | |||||||||||
1961 | 0.83 | 0.64 | 0.46 | 0.28 | 0.30 | 0.51 | 0.31 | 0.13 | 0.34 | 0.72 | 1.29 | 1.41 | 1.41 | |||||||||||||
1962 | 0.51 | 0.32 | 0.48 | 0.65 | 0.60 | 0.34 | 0.08 | 0.47 | 1.10 | 0.79 | 0.68 | 0.92 | 1.10 | |||||||||||||
1963 | 1.05 | 0.90 | 0.48 | 0.41 | 0.69 | 0.86 | 0.06 | 0.52 | 0.75 | 0.13 | 2.25 | 0.56 | 2.25 | |||||||||||||
1964 | 0.76 | 0.18 | 0.46 | 0.55 | 0.33 | 0.58 | 0.53 | 0.25 | 0.72 | 0.03 | 0.54 | 0.90 | 0.90 | |||||||||||||
1965 | 1.12 | 0.34 | 0.37 | 0.51 | 0.15 | 0.71 | 0.17 | 0.57 | 0.10 | 0.24 | 0.68 | 0.25 | 1.12 | |||||||||||||
1966 | 0.26 | 0.38 | 0.76 | 0.63 | 0.09 | 0.32 | 0.09 | 0.21 | 0.64 | 1.19 | 0.58 | 2.25 | 2.25 | |||||||||||||
1967 | 0.73 | 0.49 | 0.32 | 0.26 | 0.43 | 0.43 | 0.07 | 0.00 | 0.41 | 0.58 | 0.82 | 0.75 | 0.82 | |||||||||||||
1968 | 0.42 | 1.14 | 0.26 | 0.66 | 0.51 | 0.18 | 0.00 | 1.22 | 0.10 | 0.78 | 1.27 | 1.54 | 1.54 | |||||||||||||
1969 | 0.64 | 0.83 | 0.19 | 0.98 | 0.50 | 0.73 | 0.02 | 0.00 | 0.40 | 0.41 | 0.25 | 0.91 | 0.98 | |||||||||||||
1970 | 1.08 | 0.51 | 0.46 | 0.17 | 0.65 | 0.40 | 0.13 | 0.00 | 0.85 | 1.07 | 0.81 | 0.59 | 1.08 | |||||||||||||
1971 | 1.23 | 0.77 | 0.50 | 0.36 | 0.14 | 0.74 | 0.08 | 0.20 | 0.17 | 1.22 | 1.37 | 1.64 | 1.64 | |||||||||||||
1972 | 1.25 | 0.53 | 0.97 | 0.49 | 0.34 | 0.63 | 0.23 | 0.09 | 0.40 | 0.14 | 0.91 | 1.75 | 1.75 | |||||||||||||
1973 | 0.67 | 0.33 | 0.42 | 0.32 | 0.74 | 0.18 | 0.11 | 0.05 | 0.57 | 0.48 | 1.00 | 1.54 | 1.54 | |||||||||||||
1974 | 0.65 | 0.51 | 0.98 | 0.27 | 0.06 | 0.28 | 0.54 | 0.23 | 0.00 | 0.11 | 0.49 | 1.31 | 1.31 | |||||||||||||
1975 | 0.95 | 0.84 | 0.47 | 0.33 | 0.31 | 0.33 | 0.18 | 0.55 | 0.01 | 0.90 | 1.43 | 1.33 | 1.43 | |||||||||||||
1976 | 1.09 | 1.36 | 0.67 | 0.40 | 0.28 | 0.37 | 0.33 | 1.04 | 0.28 | 0.07 | 0.10 | 0.17 | 1.36 | |||||||||||||
1977 | 0.40 | 0.40 | 0.40 | 0.17 | 0.43 | 0.14 | 0.22 | 0.27 | 0.51 | 0.24 | 0.97 | 1.56 | 1.56 | |||||||||||||
1978 | 0.81 | 0.51 | 0.45 | 1.36 | 0.44 | 0.31 | 0.67 | 0.35 | 0.43 | 0.00 | 0.49 | 1.43 | 1.43 | |||||||||||||
1979 | 1.03 | 0.56 | 0.89 | 0.27 | 0.56 | 0.63 | 0.03 | 0.33 | 0.20 | 0.77 | 0.85 | 0.35 | 1.03 | |||||||||||||
1980 | 0.91 | 0.59 | 0.68 | 0.27 | 0.46 | 0.68 | 0.22 | 0.03 | 1.00 | 0.37 | 0.63 | 1.30 | 1.30 | |||||||||||||
1981 | 1.61 | 1.44 | 0.79 | 0.25 | 0.35 | 0.65 | 0.30 | 0.01 | 0.33 | 0.74 | 0.78 | 1.07 | 1.61 | |||||||||||||
1982 | 2.37 | 1.04 | 0.62 | 0.70 | 0.55 | 0.51 | 0.45 | 0.13 | 0.32 | 1.51 | 0.40 | a | 1.25 | 2.37 | a | |||||||||||
1983 | 0.85 | 0.72 | 1.09 | 1.00 | 0.42 | 0.43 | 0.76 | 0.35 | 0.29 | 0.44 | 0.71 | 1.07 | a | 1.09 | a | |||||||||||
1984 | 1.35 | 0.80 | 0.47 | 0.73 | 0.67 | 0.57 | 0.15 | 1.47 | 0.23 | 0.37 | 0.84 | a | 0.60 | 1.47 | a | |||||||||||
1985 | 0.22 | 0.46 | 0.40 | 0.38 | 0.83 | 0.38 | a | 0.22 | a | 0.85 | 0.56 | 0.65 | 0.50 | 0.80 | 0.85 | b | ||||||||||
1986 | 0.90 | 1.47 | 0.75 | 0.43 | 0.43 | 0.13 | 0.33 | 0.29 | 0.75 | 0.37 | 0.75 | 0.15 | 1.47 | |||||||||||||
1987 | 0.98 | 0.27 | 0.43 | 0.52 | 0.30 | 0.15 | 0.59 | a | 0.17 | 0.00 | 0.00 | 0.63 | 0.90 | 0.98 | a | |||||||||||
1988 | 0.93 | 0.17 | 0.24 | 0.48 | 0.79 | 0.78 | 0.12 | 0.10 | 0.14 | 0.00 | 2.32 | 0.77 | 2.32 | |||||||||||||
1989 | 1.47 | 0.85 | 0.32 | 0.45 | a | 0.72 | 0.68 | 0.07 | 0.66 | 0.57 | 0.69 | 0.25 | 0.17 | 1.47 | a | |||||||||||
1990 | 0.65 | 1.07 | b | 0.33 | 0.72 | 0.95 | 0.35 | 0.25 | 0.20 | 0.00 | 0.72 | 0.47 | a | 1.44 | 1.44 | c | ||||||||||
1991 | 1.54 | 0.38 | 0.68 | 0.75 | 0.96 | 0.58 | 0.12 | 0.10 | 0.11 | 0.37 | 0.78 | 0.56 | 1.54 | |||||||||||||
1992 | 0.55 | 0.76 | 0.44 | 0.34 | 0.57 | 0.83 | 0.36 | a | 0.01 | 0.12 | 0.63 | 0.60 | 0.85 | 0.85 | a | |||||||||||
1993 | 1.19 | 0.42 | a | 0.85 | 0.53 | 0.68 | 0.52 | 0.74 | 0.25 | a | 0.00 | 0.73 | b | 0.75 | 1.60 | a | 1.60 | e | ||||||||
1994 | 0.40 | 0.68 | 0.06 | 0.89 | 0.34 | 0.10 | 0.23 | 0.00 | 0.25 | 0.23 | 0.80 | 0.90 | a | 0.90 | a | |||||||||||
1995 | 1.13 | 0.39 | 0.75 | 0.23 | 0.18 | 0.75 | 0.58 | 0.51 | 0.16 | 0.65 | 1.61 | 0.93 | 1.61 | |||||||||||||
1996 | 0.61 | a | 0.51 | 0.37 | 1.05 | 1.05 | 0.34 | 1.00 | 0.06 | 0.62 | 1.09 | 0.92 | 1.05 | 1.09 | a | |||||||||||
1997 | 0.95 | 0.33 | 0.70 | 1.00 | 0.71 | 0.57 | 0.90 | 0.37 | 0.82 | 0.38 | 0.40 | 1.92 | 1.92 | |||||||||||||
1998 | 0.88 | 0.33 | 0.83 | 0.28 | 1.65 | 0.69 | 0.18 | 0.12 | 0.71 | 0.06 | 0.70 | 1.10 | 1.65 | |||||||||||||
1999 | 0.42 | 0.96 | 0.20 | 0.17 | 0.42 | 0.42 | 0.15 | 0.46 | 0.00 | 0.65 | 2.07 | 1.29 | 2.07 | |||||||||||||
2000 | 1.23 | 1.11 | 0.48 | 0.25 | 0.21 | 0.55 | 0.04 | 0.08 | 0.59 | 0.40 | 0.57 | 0.49 | 1.23 | |||||||||||||
2001 | 0.72 | 0.28 | 0.69 | 0.50 | 0.72 | 0.16 | 0.27 | 0.00 | 0.14 | 0.51 | 0.85 | 1.32 | 1.32 | |||||||||||||
2002 | 0.92 | 0.65 | 0.77 | 0.37 | 0.18 | 0.21 | 0.58 | 0.15 | 0.21 | 0.09 | 0.28 | 1.53 | 1.53 | |||||||||||||
2003 | 0.51 | 0.24 | 0.64 | 0.37 | 0.52 | 0.14 | 0.07 | 0.47 | 0.14 | 0.20 | 0.37 | 0.89 | 0.89 | |||||||||||||
2004 | 1.15 | 1.09 | 0.34 | 0.39 | 0.37 | 0.60 | 0.44 | 0.46 | 0.72 | 0.44 | 0.48 | 0.50 | 1.15 | |||||||||||||
2005 | 0.72 | 0.40 | 0.98 | 0.54 | 0.78 | 0.40 | 0.30 | 0.01 | 0.24 | 0.40 | 0.74 | 1.80 | a | 1.80 | a | |||||||||||
2006 | 1.32 | 0.89 | 0.72 | a | 0.72 | b | 0.39 | 1.02 | 0.06 | 0.03 | 0.72 | 0.10 | 0.77 | 1.09 | 1.32 | c | ||||||||||
2007 | 0.32 | 0.54 | 0.23 | 0.55 | 0.51 | 0.58 | 0.04 | 0.33 | 0.45 | 0.92 | 0.91 | 0.89 | 0.92 | |||||||||||||
2008 | 0.86 | 0.61 | 0.22 | 0.29 | 0.61 | a | 0.15 | 0.22 | 0.16 | 0.98 | 0.46 | 0.60 | 0.90 | 0.98 | a | |||||||||||
2009 | 0.92 | 0.37 | 0.60 | 0.42 | 0.53 | 0.80 | 0.04 | 0.76 | 0.01 | 0.65 | 0.43 | 1.92 | 1.92 | |||||||||||||
2010 | 1.12 | 0.74 | 0.25 | 0.80 | 0.31 | 1.76 | 0.15 | 0.22 | 0.19 | 0.50 | b | ----- | z | ----- | z | ----- | z | |||||||||
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.02 | 0.09 | 0.05 | 0.96 | 0.41 | 0.92 | ----- | z | ||||||
2012 | 1.19 | 0.76 | 0.78 | 0.63 | a | 0.44 | 0.46 | 0.26 | 0.00 | 0.04 | 1.06 | 0.89 | 0.74 | 1.19 | a | |||||||||||
2013 | 0.63 | 0.68 | a | 0.48 | a | 0.16 | 0.34 | 0.50 | 0.00 | 0.13 | 1.13 | 0.05 | 0.84 | 0.58 | 1.13 | b | ||||||||||
2014 | 0.69 | 1.11 | 1.15 | 1.10 | 0.21 | 0.25 | 0.13 | 0.10 | 0.43 | 0.77 | 1.27 | 1.54 | 1.54 | |||||||||||||
2015 | 0.84 | 0.37 | 0.38 | 0.25 | 0.76 | 0.18 | 0.51 | 0.10 | 0.20 | 0.55 | 0.71 | 1.64 | 1.64 | |||||||||||||
2016 | 0.72 | 0.63 | 0.52 | 0.56 | 0.52 | 0.11 | 0.38 | 0.11 | 0.31 | 0.78 | 0.56 | 0.85 | 0.85 | |||||||||||||
2017 | 1.36 | 0.37 | 0.77 | 0.41 | 0.27 | 0.37 | 0.00 | 0.02 | 0.51 | 0.96 | 0.63 | 0.25 | 1.36 | |||||||||||||
2018 | 0.81 | 0.58 | 0.47 | 0.32 | 0.23 | 0.19 | 0.00 | a | 0.04 | 0.02 | 0.51 | 0.59 | 0.99 | 0.99 | a | |||||||||||
2019 | 1.32 | 1.17 | 0.36 | 0.50 | 0.88 | 0.28 | b | 0.04 | 0.10 | 0.66 | 0.30 | 0.17 | 0.86 | 1.32 | b | |||||||||||
2020 | 1.20 | 0.45 | 0.31 | 0.18 | 1.05 | 0.74 | 0.01 | 0.10 | 0.23 | 0.58 | 0.80 | 0.81 | 1.20 | |||||||||||||
2021 | 1.10 | 0.71 | 0.25 | 0.21 | 0.29 | 0.27 | 0.00 | 0.35 | 0.31 | 0.35 | 0.35 | 0.94 | 1.10 | |||||||||||||
2022 | 0.79 | 0.13 | 0.21 | 0.41 | 0.69 | 0.37 | 0.10 | 0.18 | 0.10 | 0.35 | 1.69 | 0.56 | 1.69 | |||||||||||||
2023 | 0.50 | 0.15 | 0.61 | 0.47 | 0.24 | 0.50 | 0.04 | 2.55 | 0.17 | 0.27 | 0.66 | 0.77 | 2.55 | |||||||||||||
2024 | 0.65 | 0.41 | 0.51 | 0.05 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.86 | 0.67 | 0.55 | 0.53 | 0.54 | 0.49 | 0.24 | 0.28 | 0.38 | 0.51 | 0.78 | 0.99 | 1.40 | |||||||||||||
S.D. | 0.37 | 0.33 | 0.25 | 0.32 | 0.31 | 0.29 | 0.23 | 0.38 | 0.34 | 0.32 | 0.45 | 0.49 | 0.41 | |||||||||||||
SKEW | 0.92 | 0.85 | 0.59 | 1.76 | 1.20 | 1.42 | 1.25 | 3.19 | 1.23 | 0.48 | 1.39 | 0.45 | 0.76 | |||||||||||||
MAX | 2.37 | 1.80 | 1.31 | 1.95 | 1.65 | 1.76 | 1.00 | 2.55 | 1.57 | 1.51 | 2.32 | 2.29 | 2.55 | |||||||||||||
MIN | 0.22 | 0.13 | 0.06 | 0.08 | 0.06 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 0.82 | |||||||||||||
YRS | 85 | 81 | 83 | 86 | 85 | 84 | 87 | 88 | 88 | 85 | 82 | 86 | 68 |