YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.75 | q | 1.00 | 0.30 | 0.12 | 0.30 | ----- | z | ||||
1930 | 0.25 | 1.25 | 0.75 | 1.00 | 0.70 | 1.80 | 0.80 | 0.30 | 2.00 | 1.00 | 0.41 | 0.10 | 2.00 | |||||||||||||
1931 | 0.20 | 0.49 | 0.50 | 0.80 | 0.60 | 1.85 | u | 1.01 | 0.80 | 2.10 | 0.60 | 0.70 | 0.45 | 2.10 | u | |||||||||||
1932 | 0.96 | 0.70 | 0.55 | 0.70 | ----- | z | 0.52 | 1.30 | 2.02 | v | 0.70 | 0.60 | 0.60 | 0.84 | ----- | z | ||||||||||
1933 | 0.37 | 0.36 | 0.50 | 1.80 | 1.75 | 0.80 | 0.70 | 0.03 | 1.00 | 1.05 | 0.20 | 0.35 | 1.80 | |||||||||||||
1934 | 0.20 | a | 0.30 | 0.40 | u | 2.30 | 0.70 | 1.40 | a | 0.50 | 1.17 | 1.85 | 1.46 | 0.60 | 0.46 | 2.30 | w | |||||||||
1935 | 1.00 | v | 0.25 | a | 0.57 | 0.73 | 1.08 | 2.63 | 1.59 | 2.47 | 0.68 | 1.38 | v | 0.36 | 0.46 | ----- | z | |||||||||
1936 | 0.18 | 0.46 | 0.73 | 1.03 | 1.47 | 1.08 | 0.21 | 0.94 | 1.82 | 0.33 | 0.28 | 0.80 | 1.82 | |||||||||||||
1937 | 0.50 | 0.23 | 0.43 | 1.48 | 1.03 | 0.46 | 1.08 | 1.20 | 1.42 | 1.39 | 0.58 | 0.16 | 1.48 | |||||||||||||
1938 | 0.25 | 0.32 | 1.28 | 0.92 | 3.00 | 2.13 | 1.53 | 1.36 | 4.09 | 1.02 | 1.89 | 0.14 | 4.09 | |||||||||||||
1939 | 0.47 | 0.86 | 0.22 | 2.17 | 1.23 | 3.13 | 3.30 | 1.73 | 1.43 | 0.99 | 0.19 | 0.61 | 3.30 | |||||||||||||
1940 | 0.05 | 0.21 | 0.37 | 1.20 | 0.53 | 1.68 | 0.44 | 0.89 | 0.14 | 0.64 | 0.84 | n | 0.97 | 1.68 | n | |||||||||||
1941 | 0.40 | a | 0.09 | 0.24 | 0.29 | 2.29 | 0.79 | 1.25 | 3.12 | 2.48 | 1.85 | 0.71 | 0.22 | 3.12 | a | |||||||||||
1942 | 0.04 | 0.18 | 0.72 | 0.35 | 3.79 | 2.17 | 1.07 | 1.16 | 4.29 | 1.17 | 0.38 | 0.71 | v | 4.29 | v | |||||||||||
1943 | 0.36 | t | 0.36 | 0.89 | 0.32 | u | 0.90 | 2.44 | 0.32 | 1.15 | 0.87 | 0.61 | 1.36 | 0.00 | ----- | z | ||||||||||
1944 | 0.54 | 0.51 | 0.41 | 1.02 | 1.16 | 1.19 | 0.81 | 0.73 | w | 1.00 | 0.62 | 0.72 | 0.11 | 1.19 | w | |||||||||||
1945 | 0.22 | 0.40 | 0.91 | 1.10 | 1.96 | 0.88 | 0.89 | 2.02 | 0.62 | 0.29 | 0.75 | 0.99 | 2.02 | |||||||||||||
1946 | 1.14 | 0.58 | 0.32 | 0.23 | 0.73 | 1.35 | 0.44 | 1.27 | 1.72 | 1.33 | 0.72 | 0.58 | 1.72 | |||||||||||||
1947 | 0.14 | 0.13 | 0.41 | 1.40 | 0.56 | 0.48 | 0.91 | 0.61 | 2.86 | 0.36 | 0.30 | 0.35 | 2.86 | |||||||||||||
1948 | 0.16 | 1.17 | a | 0.41 | 0.62 | 0.30 | 1.06 | 1.11 | 2.97 | 0.75 | 0.18 | 0.92 | 0.60 | 2.97 | a | |||||||||||
1949 | 0.45 | 0.07 | 0.72 | 0.94 | 0.44 | 1.14 | 2.50 | 0.99 | 1.09 | 0.82 | 0.33 | 0.41 | 2.50 | |||||||||||||
1950 | 0.74 | 0.14 | 0.80 | 0.59 | 0.94 | ----- | z | ----- | z | 0.89 | 1.20 | 0.48 | 0.38 | 0.42 | ----- | z | ||||||||||
1951 | 0.12 | 1.06 | 0.60 | 0.83 | 1.77 | 0.93 | 1.79 | 0.70 | 1.78 | 1.50 | 0.41 | 0.30 | 1.79 | |||||||||||||
1952 | 0.43 | 0.28 | 0.43 | 0.48 | 1.09 | 1.26 | 1.10 | 1.58 | 0.45 | 0.07 | 0.18 | 0.22 | 1.58 | |||||||||||||
1953 | 0.28 | 0.61 | 0.64 | 0.75 | 1.37 | 1.91 | 1.27 | 0.72 | 0.42 | 0.06 | 1.89 | 0.97 | 1.91 | |||||||||||||
1954 | 0.09 | 0.14 | 0.42 | 2.75 | 2.90 | 2.30 | 1.94 | 1.68 | 1.35 | 1.76 | 0.23 | 0.07 | 2.90 | |||||||||||||
1955 | 0.12 | 0.18 | 0.55 | 1.24 | 3.18 | 0.92 | 2.72 | ----- | z | 0.54 | 0.98 | 0.30 | 0.35 | ----- | z | |||||||||||
1956 | 0.37 | 0.13 | 0.85 | 0.42 | 1.02 | 0.93 | 0.78 | 2.70 | 0.52 | 1.24 | 0.47 | 0.17 | 2.70 | |||||||||||||
1957 | 0.09 | 0.17 | 0.30 | 0.28 | 1.41 | 2.24 | 1.08 | 1.32 | 0.86 | 0.81 | 0.48 | 0.29 | 2.24 | |||||||||||||
1958 | 0.15 | 0.04 | 0.21 | 1.57 | 1.57 | 1.76 | 2.16 | 1.03 | 4.68 | 0.50 | 0.86 | 0.05 | 4.68 | |||||||||||||
1959 | 0.12 | 0.16 | 0.22 | 0.72 | 1.21 | 1.09 | 5.85 | 1.73 | 1.70 | 0.72 | 0.18 | 1.32 | 5.85 | |||||||||||||
1960 | 0.18 | 0.16 | 0.09 | 0.84 | 1.25 | 0.88 | 1.40 | 5.70 | 2.39 | 0.71 | 1.36 | 0.83 | 5.70 | |||||||||||||
1961 | 0.03 | 0.41 | 0.44 | 0.71 | 1.08 | 1.04 | 1.02 | 0.74 | 1.12 | 0.94 | 0.74 | 0.37 | 1.12 | |||||||||||||
1962 | 0.49 | 0.51 | 0.70 | 0.73 | 1.77 | 0.66 | 0.72 | 2.43 | 1.64 | 0.81 | 0.25 | 0.13 | 2.43 | |||||||||||||
1963 | 0.14 | 0.24 | 0.69 | 0.67 | 1.75 | 1.26 | 1.79 | 1.35 | 1.44 | 0.76 | 0.33 | 0.30 | 1.79 | |||||||||||||
1964 | 0.17 | 0.04 | 0.79 | 1.19 | 0.47 | 1.21 | 0.87 | 0.79 | 2.78 | 0.29 | 0.57 | 0.97 | 2.78 | |||||||||||||
1965 | 0.22 | 0.80 | 0.67 | 0.93 | 2.59 | 2.02 | 2.23 | 0.58 | 0.91 | 0.36 | 0.94 | 2.22 | 2.59 | |||||||||||||
1966 | 0.52 | 0.35 | 0.91 | 0.33 | 0.21 | 0.97 | 1.36 | 2.34 | 1.24 | 2.83 | 0.17 | 0.33 | 2.83 | |||||||||||||
1967 | 1.81 | 0.27 | 0.44 | 1.50 | 0.86 | 1.75 | 1.70 | 1.46 | 1.31 | 0.70 | 0.08 | 0.17 | 1.81 | |||||||||||||
1968 | 0.84 | 0.06 | 0.68 | 0.97 | 2.62 | 1.77 | 1.22 | 1.14 | 1.97 | 1.45 | 0.39 | 0.65 | 2.62 | |||||||||||||
1969 | 0.97 | 0.01 | 0.65 | 1.01 | 1.31 | 1.36 | 1.67 | 0.58 | 0.42 | 0.88 | 0.38 | 0.65 | 1.67 | |||||||||||||
1970 | 0.17 | 0.11 | 0.50 | 0.78 | 1.24 | 0.92 | 1.40 | 0.48 | 1.23 | 1.28 | 0.64 | 0.20 | 1.40 | |||||||||||||
1971 | 0.30 | 0.74 | 0.19 | 0.70 | 1.54 | 0.90 | 1.72 | 2.25 | 1.26 | 1.07 | 0.96 | 0.31 | 2.25 | |||||||||||||
1972 | 0.75 | 0.25 | 0.40 | 0.89 | 0.39 | 1.43 | 1.40 | 1.10 | 2.63 | 1.05 | 1.27 | 0.68 | 2.63 | |||||||||||||
1973 | 0.70 | 0.30 | 1.18 | a | 2.10 | 2.17 | 1.10 | 0.73 | 1.10 | 1.55 | 0.98 | 0.75 | 0.33 | 2.17 | a | |||||||||||
1974 | 0.40 | 0.24 | 0.85 | 1.40 | 1.20 | 2.05 | 0.50 | 1.72 | 0.87 | 0.75 | 1.00 | 0.12 | 2.05 | |||||||||||||
1975 | 0.38 | 0.31 | 0.52 | 3.00 | 1.10 | 1.93 | 1.00 | 2.13 | 1.12 | 0.85 | 2.90 | 1.07 | 3.00 | |||||||||||||
1976 | 0.34 | 0.38 | 1.25 | 0.65 | 0.53 | 2.01 | 1.87 | 0.44 | 0.25 | 0.36 | 0.05 | 0.21 | 2.01 | |||||||||||||
1977 | 0.16 | 0.30 | 0.88 | 1.10 | 0.79 | 1.06 | 1.20 | 2.76 | 1.59 | 1.35 | 0.54 | 0.83 | 2.76 | |||||||||||||
1978 | 0.19 | a | 0.09 | 0.15 | 1.18 | 0.80 | b | 2.25 | 1.70 | 2.13 | 1.34 | 0.58 | 0.83 | 0.37 | 2.25 | c | ||||||||||
1979 | 0.42 | 0.33 | 0.88 | 0.40 | 1.08 | 3.65 | a | 1.15 | 2.24 | 0.94 | 1.57 | 0.47 | 0.28 | 3.65 | a | |||||||||||
1980 | 0.59 | 0.11 | 0.20 | 0.45 | 1.19 | 2.03 | 0.85 | 2.36 | 1.58 | 1.03 | 0.30 | 0.27 | 2.36 | |||||||||||||
1981 | 0.03 | 1.04 | 0.83 | 2.43 | 0.89 | 1.20 | 1.13 | 1.68 | 0.80 | 1.10 | 0.52 | 0.18 | 2.43 | |||||||||||||
1982 | 0.57 | a | 0.15 | 0.37 | 1.28 | 1.30 | 0.90 | 0.98 | 0.96 | 1.43 | 1.30 | a | 1.38 | 1.26 | 1.43 | b | ||||||||||
1983 | 0.45 | 0.61 | 0.90 | 0.18 | f | 1.50 | 0.83 | 1.12 | a | 2.04 | a | 2.10 | 0.98 | 0.87 | 0.38 | 2.10 | h | |||||||||
1984 | 0.21 | 1.15 | 0.40 | 1.37 | 0.75 | 1.11 | 0.67 | 0.98 | 2.23 | 0.88 | 0.45 | 0.98 | 2.23 | |||||||||||||
1985 | 0.03 | 0.70 | ----- | z | 1.52 | 0.35 | 0.90 | 1.12 | 2.46 | 1.39 | 1.24 | 0.49 | 0.60 | a | ----- | z | ||||||||||
1986 | 0.35 | 0.14 | c | 0.59 | 0.83 | 0.59 | 1.29 | 1.76 | 1.81 | a | 3.14 | 1.46 | 0.88 | 0.11 | 3.14 | d | ||||||||||
1987 | 0.40 | 0.04 | 0.52 | 0.25 | 0.51 | 0.49 | 2.96 | 0.84 | 1.40 | 1.46 | 0.66 | 0.47 | 2.96 | |||||||||||||
1988 | 0.30 | 0.08 | a | 1.01 | 0.74 | 0.64 | 0.79 | 0.60 | 1.74 | 1.29 | 0.25 | 1.26 | 0.60 | 1.74 | a | |||||||||||
1989 | 0.19 | 0.14 | 1.06 | 0.45 | 1.82 | 0.70 | 1.57 | 1.93 | 1.26 | 0.34 | 0.48 | 0.06 | b | 1.93 | b | |||||||||||
1990 | 0.75 | 0.35 | 1.04 | 0.86 | 1.20 | a | 2.10 | 1.11 | 1.95 | 1.15 | 0.54 | 0.28 | 1.50 | 2.10 | a | |||||||||||
1991 | 0.15 | b | 0.53 | 1.20 | 0.60 | 1.36 | 0.95 | 1.41 | 0.70 | 2.54 | 0.39 | 1.90 | 0.44 | 2.54 | b | |||||||||||
1992 | 0.29 | 0.30 | 0.49 | 1.83 | 0.56 | a | 0.97 | 1.05 | 0.57 | 1.60 | 1.64 | 1.10 | 0.25 | 1.83 | a | |||||||||||
1993 | 0.40 | 0.12 | a | 0.56 | 0.66 | d | 1.68 | 2.82 | 0.54 | 2.55 | 1.38 | 0.43 | 0.70 | a | 0.28 | a | 2.82 | g | ||||||||
1994 | 0.44 | 0.22 | 0.15 | 1.30 | 0.85 | 0.74 | 0.73 | a | 0.85 | 1.15 | 0.42 | 0.86 | d | 0.19 | 1.30 | e | ||||||||||
1995 | 0.23 | 0.12 | 0.55 | b | 0.93 | b | 1.00 | c | 0.54 | b | 0.74 | c | 2.85 | c | 0.65 | a | 1.52 | d | 0.58 | c | 0.91 | b | 2.85 | y | ||
1996 | 1.10 | b | 0.29 | a | 2.00 | a | 0.52 | a | 0.79 | b | 1.01 | c | 1.18 | b | 0.68 | b | 1.36 | d | 1.34 | 2.55 | t | 0.57 | e | ----- | z | |
1997 | 1.23 | c | 0.00 | a | 0.45 | e | 0.28 | a | 0.80 | b | 1.33 | a | 1.52 | e | 1.78 | c | 1.50 | a | 1.25 | a | 0.50 | e | 0.10 | a | ----- | z |
1998 | 0.35 | d | 0.28 | f | 1.10 | a | 1.25 | b | 1.34 | a | 1.19 | a | 1.09 | c | 3.15 | e | 1.33 | a | 0.52 | b | 0.63 | 0.20 | ----- | z | ||
1999 | 0.27 | b | 0.67 | 0.33 | b | 1.05 | c | 1.52 | b | 1.12 | b | 1.94 | b | 1.30 | f | 0.51 | a | 0.52 | b | 0.62 | 0.14 | b | 1.94 | x | ||
2000 | 0.57 | 0.24 | 0.78 | d | 1.25 | b | 0.80 | a | 1.30 | a | 4.10 | 3.30 | 1.90 | c | 0.41 | 0.80 | b | 0.32 | b | 4.10 | o | |||||
2001 | 0.56 | d | 0.57 | d | 0.34 | b | 1.35 | h | 0.72 | e | 1.40 | h | 1.92 | b | 0.87 | c | 1.18 | d | 1.12 | b | 1.42 | g | 0.46 | f | ----- | z |
2002 | 0.34 | 0.90 | a | 0.95 | b | 1.74 | d | 0.73 | d | 2.60 | c | 0.57 | d | 1.80 | d | 2.05 | h | 1.90 | d | 0.00 | 0.41 | d | ----- | z | ||
2003 | 0.06 | d | 0.43 | d | 1.12 | f | 1.42 | e | 2.20 | a | 1.20 | c | 1.05 | g | 0.15 | h | 1.76 | 0.55 | a | 1.02 | a | 0.41 | ----- | z | ||
2004 | 0.27 | e | 0.75 | g | 0.60 | a | 0.63 | 1.19 | i | 1.90 | a | 0.35 | 0.63 | e | 1.85 | c | 1.58 | 0.62 | 0.24 | a | ----- | z | ||||
2005 | 0.68 | a | 0.33 | 0.65 | 0.43 | 0.55 | 1.49 | 0.75 | 3.03 | 1.47 | a | 1.50 | f | 0.75 | 0.32 | 3.03 | h | |||||||||
2006 | 0.54 | k | 0.28 | 0.95 | 0.31 | v | 0.51 | 1.05 | g | 1.38 | j | 2.65 | 1.07 | i | 0.60 | h | 0.55 | 0.80 | ----- | z | ||||||
2007 | 0.70 | 0.74 | 1.23 | 0.35 | 1.10 | c | 0.63 | 1.04 | 2.60 | 2.48 | 1.60 | 0.11 | 0.80 | g | 2.60 | j | ||||||||||
2008 | 0.19 | b | 0.30 | b | 0.37 | a | 1.70 | 1.16 | 1.14 | c | 0.87 | b | 1.55 | 1.05 | a | 0.58 | f | 0.29 | 0.45 | f | 1.70 | w | ||||
2009 | 0.27 | 0.20 | 0.52 | 1.31 | 0.47 | 1.82 | 0.30 | a | 1.20 | d | 0.69 | 1.10 | b | 0.15 | 0.61 | 1.82 | g | |||||||||
2010 | 0.45 | 0.15 | 0.20 | 0.56 | e | 0.62 | d | 1.36 | i | 2.10 | o | 2.80 | i | 2.73 | g | 1.23 | h | 1.03 | j | 0.72 | h | ----- | z | |||
2011 | 0.31 | g | 0.15 | k | 1.19 | d | 0.90 | f | 1.12 | f | 1.22 | n | 1.82 | h | 1.34 | e | 0.95 | g | 1.55 | h | 0.54 | g | 0.53 | e | ----- | z |
2012 | 0.31 | i | 1.52 | g | 0.39 | f | 0.63 | c | 1.14 | f | 3.70 | l | 1.00 | g | 0.37 | a | 0.40 | f | 0.73 | b | 0.43 | k | 0.45 | e | ----- | z |
2013 | 0.70 | b | 0.75 | b | 0.83 | c | 1.18 | c | 2.42 | e | 1.30 | d | 0.74 | a | 0.93 | d | 0.78 | b | 1.80 | c | 0.48 | a | 0.53 | e | ----- | z |
2014 | 0.28 | d | 0.78 | a | 0.34 | a | 1.55 | f | 1.65 | d | 1.16 | d | 0.46 | a | 1.41 | c | 1.73 | b | 0.62 | d | 0.52 | e | 0.50 | d | ----- | z |
2015 | 0.09 | c | 0.12 | 0.22 | b | 1.04 | d | 1.13 | k | 0.83 | c | 1.85 | i | 1.23 | c | 1.26 | e | 1.00 | b | 1.72 | c | 0.88 | d | ----- | z | |
2016 | 0.27 | a | 0.48 | d | 1.90 | c | 2.00 | a | 1.10 | d | 0.98 | d | 2.54 | k | 1.80 | d | 2.10 | d | 1.88 | c | 0.73 | a | 0.92 | e | ----- | z |
2017 | 0.53 | d | 0.93 | b | 0.40 | c | 1.00 | g | 1.65 | a | 2.10 | c | 0.68 | c | 1.04 | d | 1.00 | g | 1.88 | f | 0.20 | c | 0.27 | c | ----- | z |
2018 | 0.46 | a | 0.79 | e | 0.45 | 0.55 | a | 1.35 | c | 2.74 | b | 1.20 | c | 2.54 | d | 1.89 | 2.52 | c | 0.75 | f | 1.62 | a | ----- | z | ||
2019 | 0.26 | 0.76 | c | 0.36 | c | 1.30 | 1.93 | a | 1.70 | a | 2.20 | a | 1.04 | b | 2.10 | d | 1.10 | c | 0.50 | c | 1.16 | a | 2.20 | v | ||
2020 | 0.45 | d | 0.24 | a | 0.90 | b | 1.30 | a | 1.16 | e | 2.93 | b | 2.20 | 3.00 | d | 0.75 | b | 0.55 | a | 1.10 | 0.42 | a | 3.00 | w | ||
2021 | 0.26 | a | 0.29 | 0.70 | 0.61 | b | 0.88 | a | 1.26 | a | 2.41 | 2.12 | b | 1.21 | b | 0.73 | b | 2.00 | a | 0.60 | b | 2.41 | n | |||
2022 | 0.18 | a | 0.26 | f | 0.93 | a | 1.05 | d | 1.10 | d | 0.65 | d | 1.90 | b | 1.62 | b | 1.87 | a | 0.50 | 1.26 | 1.23 | 1.90 | y | |||
2023 | 0.44 | b | 0.80 | b | 0.61 | a | 1.41 | e | 0.94 | 1.55 | c | 1.83 | b | 1.52 | a | 3.51 | a | 1.70 | b | 0.04 | 1.25 | f | 3.51 | y | ||
2024 | 0.20 | 0.32 | 1.19 | a | 0.72 | k | 0.80 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.39 | 0.39 | 0.65 | 1.03 | 1.23 | 1.41 | 1.33 | 1.58 | 1.51 | 0.96 | 0.68 | 0.51 | 2.50 | |||||||||||||
S.D. | 0.30 | 0.30 | 0.35 | 0.57 | 0.69 | 0.67 | 0.85 | 0.90 | 0.85 | 0.53 | 0.51 | 0.40 | 0.96 | |||||||||||||
SKEW | 1.88 | 1.03 | 1.17 | 1.12 | 1.31 | 0.98 | 2.34 | 1.26 | 1.42 | 0.80 | 1.68 | 1.54 | 1.75 | |||||||||||||
MAX | 1.81 | 1.25 | 2.00 | 3.00 | 3.79 | 3.65 | 5.85 | 5.70 | 4.68 | 2.83 | 2.90 | 2.22 | 5.85 | |||||||||||||
MIN | 0.03 | 0.00 | 0.09 | 0.23 | 0.21 | 0.46 | 0.21 | 0.03 | 0.14 | 0.06 | 0.00 | 0.00 | 1.12 | |||||||||||||
YRS | 90 | 90 | 91 | 87 | 89 | 87 | 86 | 88 | 89 | 88 | 88 | 89 | 51 |