YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.32 | 0.32 | 0.55 | 0.42 | ----- | z | ||||
1926 | 0.75 | 0.94 | 0.21 | 0.27 | 0.36 | 0.38 | 0.05 | 1.33 | 0.98 | 0.52 | 0.54 | 0.75 | 1.33 | |||||||||||||
1927 | 0.51 | 1.03 | 0.48 | 0.17 | 0.49 | 0.40 | 0.08 | 0.54 | 1.87 | 0.65 | 0.71 | 0.75 | 1.87 | |||||||||||||
1928 | 0.35 | 0.12 | 0.45 | 0.45 | 0.44 | 0.30 | 0.52 | 0.09 | 0.02 | 0.23 | 0.20 | 0.95 | 0.95 | |||||||||||||
1929 | 0.26 | 0.10 | 0.50 | 0.80 | b | 0.15 | 0.95 | 0.00 | 0.00 | 0.27 | 0.14 | 0.04 | 0.56 | 0.95 | b | |||||||||||
1930 | 0.27 | 0.42 | 0.50 | 0.53 | 0.63 | 0.47 | 0.07 | a | 0.32 | 0.16 | 0.35 | 0.62 | 0.24 | 0.63 | a | |||||||||||
1931 | 0.74 | 0.45 | 0.58 | a | 0.15 | 0.28 | 1.05 | 0.14 | 0.00 | 0.68 | 0.51 | 0.58 | 0.80 | 1.05 | a | |||||||||||
1932 | 0.95 | 0.30 | 0.40 | 1.15 | 1.07 | 0.35 | 0.23 | 0.09 | 0.15 | 0.30 | 0.74 | 1.05 | 1.15 | |||||||||||||
1933 | 0.55 | 0.50 | 0.72 | 0.20 | 0.30 | 0.14 | 0.13 | 0.13 | 0.85 | 0.65 | 0.64 | 0.84 | 0.85 | |||||||||||||
1934 | 1.40 | 0.15 | 0.32 | 0.45 | 0.22 | 0.33 | 0.36 | 0.43 | 0.25 | 1.07 | 0.50 | 0.50 | 1.40 | |||||||||||||
1935 | 0.68 | 0.45 | 0.31 | 0.14 | 0.81 | 0.28 | 0.76 | 0.45 | 0.55 | 0.40 | 0.59 | 0.44 | 0.81 | |||||||||||||
1936 | 0.91 | a | 0.30 | 0.06 | 0.35 | 0.55 | 1.19 | 0.11 | 0.00 | 0.65 | 0.29 | 0.05 | 0.45 | 1.19 | a | |||||||||||
1937 | 0.45 | 0.50 | 0.56 | 0.67 | 0.03 | 0.75 | 0.36 | 0.07 | 0.67 | 0.23 | 0.90 | 0.75 | 0.90 | |||||||||||||
1938 | 1.25 | 0.80 | 0.58 | 0.05 | o | ----- | z | 0.16 | 0.02 | 0.25 | 0.22 | 1.53 | 0.41 | 0.60 | ----- | z | ||||||||||
1939 | 0.52 | o | 0.38 | r | 2.41 | u | 0.52 | 0.46 | 0.50 | ----- | z | 0.00 | 0.19 | 0.40 | w | 0.22 | 0.95 | ----- | z | |||||||
1940 | 0.38 | 0.80 | 0.58 | 0.50 | 0.16 | 0.16 | 0.14 | 0.10 | 1.06 | 0.96 | 0.51 | 0.50 | 1.06 | |||||||||||||
1941 | 0.57 | 0.28 | 0.53 | 0.20 | 1.07 | 0.37 | 0.04 | 0.76 | 0.83 | 0.26 | 1.38 | 0.79 | 1.38 | |||||||||||||
1942 | 0.41 | 0.44 | 0.19 | 0.27 | 0.86 | 0.44 | 0.45 | 0.06 | 0.09 | 0.44 | 0.74 | 0.60 | 0.86 | |||||||||||||
1943 | 0.24 | 0.38 | 0.46 | 0.43 | 0.23 | 0.23 | 0.08 | 0.46 | 0.06 | 1.04 | 0.24 | 0.31 | 1.04 | |||||||||||||
1944 | 0.58 | 0.20 | 0.21 | 0.73 | 0.36 | 0.40 | 0.51 | 0.12 | 0.20 | 0.25 | 0.59 | 0.31 | 0.73 | |||||||||||||
1945 | 0.40 | 0.41 | 1.44 | 0.31 | 0.50 | 0.60 | 0.00 | 0.26 | 0.61 | 0.43 | 0.53 | 0.45 | 1.44 | |||||||||||||
1946 | 0.36 | 1.13 | 0.24 | 0.48 | 0.28 | 0.42 | 0.04 | 0.10 | 0.71 | 0.52 | 0.72 | 0.32 | 1.13 | |||||||||||||
1947 | 0.80 | 1.10 | 0.43 | 0.20 | 0.36 | 0.63 | 0.53 | 0.33 | 0.51 | 0.96 | 0.48 | i | 0.52 | 1.10 | i | |||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.98 | c | 0.48 | 0.37 | 0.30 | 0.29 | 0.70 | a | 0.42 | ----- | z | |||||
1949 | 0.14 | 0.92 | 0.37 | 0.37 | 0.28 | 0.25 | a | 0.11 | 0.12 | 0.36 | 0.75 | 0.30 | 0.36 | a | 0.92 | b | ||||||||||
1950 | 0.59 | 0.49 | 0.65 | 0.19 | 0.23 | 0.32 | 0.44 | 0.32 | 0.11 | 0.74 | 0.41 | 0.45 | 0.74 | |||||||||||||
1951 | 0.71 | 0.47 | 0.42 | 0.28 | 0.34 | 0.33 | 0.18 | 0.40 | 0.52 | 0.81 | 0.60 | 1.23 | 1.23 | |||||||||||||
1952 | 0.37 | 0.25 | 0.39 | 0.15 | 0.17 | 0.74 | 0.23 | 0.60 | 0.41 | 0.05 | 0.23 | 0.62 | 0.74 | |||||||||||||
1953 | 0.77 | 0.31 | 0.60 | 0.98 | 0.55 | 0.48 | 0.10 | 0.70 | 0.11 | 0.22 | 0.55 | 0.57 | 0.98 | |||||||||||||
1954 | 0.98 | 0.52 | 0.73 | 0.36 | 0.50 | 0.41 | 0.36 | 0.55 | 0.75 | 0.09 | a | 0.41 | 0.39 | 0.98 | a | |||||||||||
1955 | 0.67 | 0.24 | 0.42 | 0.54 | 0.34 | 1.17 | 1.70 | 0.00 | 0.80 | 0.63 | a | 0.55 | 0.67 | 1.70 | a | |||||||||||
1956 | 0.60 | 0.87 | 0.41 | 0.56 | 0.39 | 0.38 | 0.52 | 0.28 | 0.10 | 0.40 | 0.39 | 0.22 | 0.87 | |||||||||||||
1957 | 0.27 | 0.77 | 0.37 | 0.30 | 1.29 | 0.25 | 0.14 | 0.18 | 0.72 | 0.49 | 0.50 | 0.72 | 1.29 | |||||||||||||
1958 | 0.69 | 1.24 | 0.34 | 1.10 | 0.38 | 0.32 | 0.46 | 0.36 | 0.28 | 0.43 | 0.81 | 0.50 | 1.24 | |||||||||||||
1959 | 1.15 | 0.25 | 0.30 | 0.21 | 0.73 | 0.25 | 0.08 | 1.11 | 0.60 | 0.45 | 0.87 | 0.78 | 1.15 | |||||||||||||
1960 | 0.72 | 0.56 | 1.15 | 0.34 | 0.63 | 0.15 | 0.01 | 0.33 | 0.37 | 0.57 | 1.25 | 0.41 | 1.25 | |||||||||||||
1961 | 0.44 | 0.48 | 0.31 | 0.65 | 0.85 | 0.32 | 0.63 | 0.11 | 0.25 | 0.45 | 0.68 | 0.82 | 0.85 | |||||||||||||
1962 | 0.63 | 0.31 | 0.30 | 0.46 | 0.43 | 0.23 | 0.01 | 0.48 | 0.86 | 0.65 | 0.68 | 0.80 | 0.86 | |||||||||||||
1963 | 0.25 | 0.86 | 0.98 | 0.62 | 0.57 | 0.32 | 0.30 | 0.31 | 0.53 | 0.19 | 0.59 | 0.37 | 0.98 | |||||||||||||
1964 | 0.45 | 0.22 | 0.40 | 0.20 | 0.80 | 0.67 | 0.15 | 0.67 | 0.26 | 0.15 | 0.40 | 0.56 | 0.80 | |||||||||||||
1965 | 1.26 | 0.95 | 0.16 | 0.89 | 0.42 | 0.57 | 0.44 | 1.30 | 0.14 | 0.07 | 0.66 | 0.80 | 1.30 | |||||||||||||
1966 | 0.81 | 0.15 | 1.04 | 0.15 | 0.13 | 0.73 | 0.36 | 0.23 | 0.35 | 0.15 | 1.05 | 1.07 | 1.07 | |||||||||||||
1967 | 0.72 | 0.24 | 0.90 | 0.70 | 0.64 | 0.55 | 0.05 | 0.02 | 0.11 | 0.55 | 0.57 | 0.65 | 0.90 | |||||||||||||
1968 | 0.71 | 0.34 | 0.59 | 0.10 | 0.88 | 0.54 | 0.20 | 0.68 | ----- | z | 0.99 | 0.89 | 0.78 | ----- | z | |||||||||||
1969 | 0.75 | 0.61 | 0.24 | 0.67 | 0.55 | 1.15 | 0.19 | 0.00 | 0.75 | 0.29 | 0.73 | 0.96 | 1.15 | |||||||||||||
1970 | 0.83 | 0.78 | 0.48 | 0.33 | 0.38 | 0.49 | 0.55 | 0.38 | 0.27 | 0.68 | 0.32 | 0.65 | 0.83 | |||||||||||||
1971 | 0.75 | 0.28 | 0.95 | 0.70 | 0.45 | 0.57 | 0.61 | 0.47 | 0.50 | 0.70 | 0.45 | 0.86 | 0.95 | |||||||||||||
1972 | 0.35 | 0.35 | 0.24 | 0.69 | 0.61 | 0.38 | 0.22 | 0.54 | 0.68 | 0.34 | 0.37 | 0.89 | 0.89 | |||||||||||||
1973 | 0.68 | 0.24 | 0.42 | 0.21 | 0.80 | 0.80 | 0.05 | 0.42 | 0.45 | 0.38 | 1.96 | 0.72 | 1.96 | |||||||||||||
1974 | 1.05 | 0.46 | 0.44 | 0.43 | 0.44 | 0.14 | 0.86 | 0.06 | 0.25 | 0.03 | 1.15 | 1.50 | 1.50 | |||||||||||||
1975 | 0.56 | 0.90 | 0.45 | 1.07 | 1.02 | 0.95 | 1.11 | 0.67 | ----- | z | 0.85 | 0.57 | 0.54 | ----- | z | |||||||||||
1976 | 0.48 | 0.38 | 0.85 | 0.30 | 0.40 | 0.45 | 0.41 | 0.96 | 0.11 | 0.25 | 0.10 | 0.38 | 0.96 | |||||||||||||
1977 | 0.48 | 0.30 | 0.64 | 0.08 | 0.97 | 0.28 | 0.25 | 0.57 | 0.32 | 0.50 | ----- | z | 0.74 | ----- | z | |||||||||||
1978 | 0.38 | 1.30 | 0.54 | 0.44 | 0.60 | 0.17 | 0.28 | 0.50 | 0.71 | 0.00 | 0.75 | 0.36 | 1.30 | |||||||||||||
1979 | 0.30 | 0.77 | 0.37 | 0.26 | 0.58 | 0.28 | 0.60 | 0.44 | 0.32 | 0.70 | 0.38 | 1.80 | 1.80 | |||||||||||||
1980 | 0.68 | 0.53 | 0.30 | 0.28 | 1.60 | 0.21 | 0.22 | 1.44 | 0.60 | 0.42 | 0.75 | 0.76 | 1.60 | |||||||||||||
1981 | 0.52 | 0.95 | 0.54 | 0.75 | 0.46 | 0.38 | 0.54 | 0.10 | 0.42 | 0.48 | 0.41 | 0.52 | 0.95 | |||||||||||||
1982 | 0.56 | 0.52 | c | 0.71 | o | 0.51 | 0.21 | w | 0.44 | d | 0.59 | 0.20 | b | 0.75 | 0.35 | 0.75 | 0.78 | b | ----- | z | ||||||
1983 | 0.30 | a | 0.45 | 0.71 | 1.30 | 0.48 | 0.60 | 1.05 | 1.10 | 0.63 | 0.29 | 0.91 | 0.43 | b | 1.30 | c | ||||||||||
1984 | 0.47 | 0.34 | 0.69 | 0.73 | 0.42 | 1.08 | 0.60 | 0.57 | 0.42 | 0.40 | 0.97 | 1.82 | b | 1.82 | b | |||||||||||
1985 | 0.35 | 0.51 | 0.36 | a | 0.22 | 0.22 | 0.48 | 0.00 | 0.55 | 0.56 | 0.36 | 0.41 | a | 0.50 | a | 0.56 | c | |||||||||
1986 | 0.55 | 1.02 | b | 0.50 | 0.46 | a | 0.55 | 0.30 | 0.63 | 0.00 | 0.85 | 0.49 | 0.40 | 0.23 | 1.02 | c | ||||||||||
1987 | 0.65 | 0.90 | 0.98 | 0.25 | 0.85 | ----- | z | 0.95 | 1.04 | 0.08 | 0.06 | 0.37 | 0.99 | ----- | z | |||||||||||
1988 | 0.62 | 0.18 | 0.50 | 0.39 | 0.83 | 0.49 | 0.03 | 0.14 | 0.88 | 0.11 | 1.17 | a | 0.51 | 1.17 | a | |||||||||||
1989 | 0.43 | 0.53 | 0.52 | 0.42 | 0.49 | 0.31 | 0.12 | 0.90 | 0.12 | 0.48 | 0.67 | 0.38 | 0.90 | |||||||||||||
1990 | 2.75 | a | 1.50 | b | 0.51 | 0.55 | 1.55 | 0.82 | 0.42 | 0.44 | 0.00 | 0.53 | 0.22 | 0.45 | c | 2.75 | f | |||||||||
1991 | 0.67 | b | 0.42 | 0.79 | 0.62 | 0.80 | m | 1.00 | 0.44 | 0.34 | 0.18 | 0.29 | 0.89 | a | 0.40 | 1.00 | p | |||||||||
1992 | 1.00 | d | 0.34 | 0.17 | 0.29 | 0.45 | 1.60 | x | 1.23 | v | 0.28 | 0.15 | 0.42 | 0.60 | j | 2.50 | e | ----- | z | |||||||
1993 | 0.48 | t | 0.50 | 1.20 | c | 0.60 | 0.63 | 0.36 | n | 0.85 | 0.32 | w | 0.27 | y | 0.35 | u | 0.30 | 0.56 | p | ----- | z | |||||
1994 | 0.35 | m | 0.26 | k | 0.50 | 0.45 | p | 0.50 | 0.60 | q | 0.00 | 0.08 | 0.20 | f | 0.54 | q | 0.60 | j | 0.69 | o | ----- | z | ||||
1995 | 0.72 | o | 0.50 | t | 0.80 | p | 0.49 | v | 0.51 | 0.97 | 0.36 | 0.26 | 0.60 | t | 0.38 | r | 0.54 | k | 0.90 | r | ----- | z | ||||
1996 | 0.40 | d | 0.64 | o | 0.36 | 1.10 | k | 0.63 | j | 0.67 | w | 0.08 | a | 0.60 | 0.32 | t | 0.75 | q | 0.75 | d | 1.00 | g | ----- | z | ||
1997 | 1.80 | b | 0.72 | a | 0.50 | q | 0.65 | a | 0.71 | 0.30 | l | 0.63 | x | 0.55 | b | 0.59 | 0.50 | r | 0.62 | r | 1.01 | a | ----- | z | ||
1998 | 0.85 | 0.90 | 0.53 | 0.52 | 2.35 | 0.30 | 0.65 | 0.01 | 0.55 | 0.22 | 1.37 | 1.43 | 2.35 | |||||||||||||
1999 | 0.35 | b | 0.68 | a | 0.47 | 0.27 | 0.97 | 1.15 | 0.25 | 0.31 | 0.11 | 0.66 | 0.60 | 0.61 | b | 1.15 | e | |||||||||
2000 | 0.80 | f | 0.36 | 1.22 | 0.93 | a | 0.29 | 0.66 | a | 0.95 | a | 0.06 | 0.40 | 0.68 | 0.45 | a | 1.14 | e | 1.22 | o | ||||||
2001 | 0.30 | a | 0.45 | 0.43 | 0.28 | 0.31 | 0.40 | 0.33 | 0.12 | 0.39 | 0.55 | a | 0.65 | p | 1.93 | f | 1.93 | x | ||||||||
2002 | 1.00 | e | 0.49 | a | 0.27 | v | 0.70 | 0.25 | w | 0.47 | v | ----- | z | 0.03 | 0.10 | 0.14 | 0.75 | w | 1.95 | e | ----- | z | ||||
2003 | 1.40 | b | 0.78 | 0.40 | w | 0.26 | 0.74 | 0.62 | y | 0.00 | 0.04 | ----- | z | 0.35 | 0.72 | 0.69 | a | ----- | z | |||||||
2004 | 0.40 | f | ----- | z | 0.28 | 0.36 | 0.94 | ----- | z | 0.62 | 1.90 | c | 0.46 | 1.00 | 0.36 | a | 1.05 | b | ----- | z | ||||||
2005 | 0.75 | b | 0.00 | ----- | z | 0.39 | 0.63 | 0.64 | g | 1.14 | c | 0.35 | 0.12 | 0.28 | a | 2.00 | b | 0.45 | ----- | z | ||||||
2006 | 1.45 | a | 0.52 | 0.49 | 0.41 | 0.37 | 0.83 | p | 0.02 | 0.35 | 0.41 | 0.82 | v | 0.73 | p | 0.63 | ----- | z | ||||||||
2007 | 0.20 | 0.42 | a | 0.25 | a | 0.55 | 0.20 | 0.44 | 0.34 | 0.24 | 0.23 | 0.18 | 0.35 | 2.02 | b | 2.02 | d | |||||||||
2008 | 0.92 | 0.40 | a | 0.60 | b | 0.27 | 0.40 | 0.35 | ----- | z | 1.01 | 0.47 | 0.57 | 0.48 | 1.11 | ----- | z | |||||||||
2009 | 0.51 | 0.41 | b | 0.54 | 0.53 | 0.34 | 0.25 | 0.44 | 0.22 | 0.38 | 0.53 | 0.49 | 0.68 | 0.68 | b | |||||||||||
2010 | 0.90 | 0.32 | 0.71 | 0.75 | 0.78 | 0.81 | 0.46 | 0.12 | 0.48 | 0.81 | 0.85 | 0.66 | 0.90 | |||||||||||||
2011 | 0.47 | e | 0.42 | i | 0.70 | j | 1.11 | j | 0.71 | h | 0.23 | h | 0.54 | i | 0.01 | h | 0.03 | l | 0.28 | m | 1.13 | i | 0.29 | i | ----- | z |
2012 | 0.86 | f | 0.52 | j | 1.57 | f | 0.59 | i | 0.56 | e | 0.90 | i | 0.30 | g | 0.01 | g | 0.00 | l | 0.64 | f | 1.40 | g | 1.30 | k | ----- | z |
2013 | 0.71 | j | 0.09 | m | 0.60 | q | 0.48 | f | 0.24 | d | 0.81 | l | 0.04 | j | 0.40 | k | 1.87 | k | 0.08 | i | 0.58 | l | 0.30 | j | ----- | z |
2014 | 0.45 | k | 0.66 | i | 0.57 | i | 0.49 | l | 0.42 | j | 0.82 | l | 0.05 | i | 0.50 | j | 0.16 | j | 0.97 | j | 0.41 | k | 0.54 | l | ----- | z |
2015 | 0.74 | q | 1.04 | k | 1.15 | i | 0.39 | k | 0.61 | n | 0.95 | g | 0.10 | k | 0.28 | j | 0.18 | 0.83 | 0.73 | l | 0.88 | i | ----- | z | ||
2016 | 0.49 | l | 0.29 | i | 0.84 | j | 0.26 | n | 0.90 | j | 0.26 | k | 0.31 | m | 0.34 | i | 0.17 | j | 1.79 | k | 0.67 | l | 0.77 | o | ----- | z |
2017 | 0.65 | n | 1.48 | h | 0.76 | k | 0.71 | l | 0.55 | m | 0.27 | y | 0.15 | h | 0.01 | g | 0.36 | l | 0.60 | j | 0.99 | k | 0.90 | h | ----- | z |
2018 | 0.80 | i | 0.64 | h | 0.53 | k | 0.83 | m | 0.71 | k | 0.41 | q | 0.06 | j | 0.33 | k | 0.08 | o | 0.48 | j | 0.51 | j | 0.91 | i | ----- | z |
2019 | 0.59 | j | 0.50 | e | 0.40 | 0.55 | f | ----- | z | 0.26 | x | 0.38 | d | 1.28 | k | 0.85 | m | 0.58 | l | 0.24 | l | 0.63 | j | ----- | z | |
2020 | 1.15 | k | 0.20 | l | 0.35 | i | 0.22 | h | 0.90 | l | 0.79 | j | 0.59 | i | 0.09 | h | 0.40 | d | 0.54 | i | 0.61 | n | 0.72 | i | ----- | z |
2021 | 1.13 | l | 0.42 | j | 0.17 | j | 0.52 | k | 0.25 | n | 0.59 | d | 0.00 | k | 1.23 | i | 0.42 | j | 0.71 | j | 0.43 | l | 0.49 | j | ----- | z |
2022 | 0.44 | k | 0.72 | j | 0.41 | k | 0.67 | i | 0.75 | k | 1.39 | h | 0.85 | m | 0.21 | i | 0.04 | h | 0.28 | j | 0.77 | k | 2.25 | n | ----- | z |
2023 | 0.46 | n | 0.25 | l | 0.52 | i | 0.84 | p | 0.62 | g | 0.42 | l | 0.19 | s | 0.70 | 0.03 | 0.30 | 0.60 | 0.67 | a | ----- | z | ||||
2024 | 0.90 | g | 0.78 | f | 0.46 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.67 | 0.54 | 0.52 | 0.47 | 0.57 | 0.51 | 0.36 | 0.40 | 0.43 | 0.47 | 0.63 | 0.74 | 1.14 | |||||||||||||
S.D. | 0.40 | 0.31 | 0.26 | 0.26 | 0.36 | 0.28 | 0.32 | 0.37 | 0.31 | 0.28 | 0.35 | 0.42 | 0.37 | |||||||||||||
SKEW | 2.30 | 0.87 | 1.24 | 0.95 | 2.06 | 0.93 | 1.37 | 1.50 | 1.44 | 0.93 | 1.58 | 1.88 | 1.17 | |||||||||||||
MAX | 2.75 | 1.50 | 1.44 | 1.30 | 2.35 | 1.19 | 1.70 | 1.90 | 1.87 | 1.53 | 2.00 | 2.50 | 2.35 | |||||||||||||
MIN | 0.14 | 0.00 | 0.06 | 0.08 | 0.03 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.22 | 0.56 | |||||||||||||
YRS | 79 | 80 | 78 | 80 | 81 | 75 | 81 | 85 | 82 | 81 | 78 | 82 | 59 |