YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.02 | 0.10 | 0.56 | 0.35 | a | 0.60 | 0.03 | ----- | z | |||||
1931 | 0.01 | 0.03 | 0.35 | 0.26 | 0.78 | 0.22 | 0.85 | 0.65 | 1.10 | 0.64 | 1.08 | 0.13 | 1.10 | |||||||||||||
1932 | 0.10 | 0.24 | 0.12 | 0.90 | 0.60 | 1.27 | 1.74 | 0.80 | 0.45 | 0.95 | 1.04 | 0.22 | 1.74 | |||||||||||||
1933 | 0.15 | 0.22 | 1.43 | 0.80 | 0.35 | 1.00 | 0.80 | 0.25 | 0.86 | 0.35 | 0.30 | a | 0.20 | 1.43 | a | |||||||||||
1934 | 0.09 | 0.18 | 0.16 | 0.55 | 2.10 | 1.40 | 0.47 | 0.51 | 0.48 | b | 1.85 | 0.48 | 0.22 | 2.10 | b | |||||||||||
1935 | 0.38 | 0.12 | 0.36 | 0.44 | 0.60 | 0.94 | 2.48 | 0.99 | 0.52 | 0.90 | 0.28 | 0.10 | 2.48 | |||||||||||||
1936 | 0.17 | 0.15 | 0.15 | 0.21 | 1.23 | 0.84 | 0.36 | 2.00 | 0.72 | 0.22 | 0.20 | 0.48 | 2.00 | |||||||||||||
1937 | 0.43 | 0.28 | q | 0.15 | 1.25 | 1.45 | 0.52 | r | ----- | z | ----- | z | ----- | z | ----- | z | 0.50 | 0.35 | ----- | z | ||||||
1938 | 0.25 | 0.30 | 0.55 | 0.65 | 1.80 | 0.97 | 0.90 | 1.22 | 0.10 | 0.15 | 0.60 | 0.15 | 1.80 | |||||||||||||
1939 | 0.15 | 0.37 | 0.50 | 0.35 | 0.80 | 0.75 | 1.80 | 2.50 | 2.00 | 1.45 | 0.00 | 0.12 | 2.50 | |||||||||||||
1940 | 0.12 | 0.30 | 0.40 | 1.84 | y | 0.32 | 0.33 | 1.50 | 0.42 | 0.37 | 0.95 | 0.35 | 0.02 | a | ----- | z | ||||||||||
1941 | 0.50 | 0.05 | 0.80 | a | 0.70 | 1.40 | 1.80 | 0.50 | 1.02 | 1.85 | 0.95 | 0.25 | a | 0.20 | 1.85 | b | ||||||||||
1942 | 0.15 | 0.25 | 0.50 | 0.45 | 0.80 | r | 0.66 | 2.61 | 2.63 | 0.57 | 0.52 | 0.30 | 0.20 | 2.63 | r | |||||||||||
1943 | 0.33 | 0.45 | 0.35 | 0.55 | 0.75 | 1.40 | 0.30 | 2.30 | 0.70 | 1.37 | 0.18 | 0.20 | 2.30 | |||||||||||||
1944 | 0.15 | 0.10 | 0.20 | 0.80 | 0.72 | 1.95 | 0.75 | 3.90 | 0.55 | 0.20 | 1.20 | 0.10 | 3.90 | |||||||||||||
1945 | 0.25 | 0.19 | 0.50 | 0.70 | 0.30 | 0.75 | 0.55 | 1.52 | 1.10 | 0.25 | 0.27 | 0.16 | 1.52 | |||||||||||||
1946 | 0.15 | 0.80 | 0.60 | 0.35 | 0.75 | 0.65 | 0.20 | 2.20 | 1.50 | 1.50 | 0.55 | 0.65 | 2.20 | |||||||||||||
1947 | 0.25 | 0.18 | 0.20 | 0.75 | 0.60 | 1.50 | 1.15 | 2.50 | 1.75 | 0.45 | 0.10 | 0.35 | 2.50 | |||||||||||||
1948 | 0.30 | 0.08 | 0.27 | 0.42 | 0.70 | 0.41 | 2.20 | 1.00 | 1.30 | 0.35 | 0.94 | 0.45 | 2.20 | |||||||||||||
1949 | 0.40 | 0.30 | 0.30 | 0.25 | 1.15 | 1.15 | 0.75 | 1.10 | 0.30 | 0.77 | 0.15 | 0.55 | 1.15 | |||||||||||||
1950 | 1.10 | 0.20 | 0.30 | 1.05 | 1.60 | 2.00 | 2.10 | 2.45 | 0.90 | 0.75 | 0.55 | 0.17 | 2.45 | |||||||||||||
1951 | 0.20 | 0.35 | 0.53 | 0.42 | 0.30 | 0.95 | 1.12 | 1.25 | 1.50 | 1.00 | 0.35 | 0.50 | 1.50 | |||||||||||||
1952 | 0.10 | 0.08 | a | 0.27 | a | 0.30 | 0.24 | 1.65 | 1.20 | 0.90 | 0.15 | 0.20 | 0.45 | 0.18 | 1.65 | b | ||||||||||
1953 | 0.75 | b | 0.15 | 0.60 | a | 0.35 | 1.30 | 1.40 | 1.58 | 2.25 | 1.70 | 0.27 | 0.75 | 0.50 | 2.25 | c | ||||||||||
1954 | 0.26 | 0.35 | 0.40 | 0.33 | 0.60 | 0.95 | 0.35 | 0.30 | 0.83 | 0.50 | 0.70 | 0.07 | 0.95 | |||||||||||||
1955 | 0.17 | 0.60 | 0.30 | 0.33 | 0.55 | 1.10 | 0.75 | 0.25 | 2.35 | 0.63 | 0.52 | 0.23 | 2.35 | |||||||||||||
1956 | 0.57 | 0.20 | 0.25 | 0.65 | 0.83 | 0.75 | 1.30 | 0.62 | 0.27 | 0.65 | 0.38 | 0.22 | 1.30 | |||||||||||||
1957 | 0.40 | 0.23 | 1.10 | 1.83 | 0.32 | 2.75 | 1.15 | 0.41 | 1.12 | 0.35 | 0.50 | 0.10 | 2.75 | |||||||||||||
1958 | 0.20 | 0.16 | 0.08 | 0.35 | 0.60 | 0.77 | 1.70 | 0.30 | 0.85 | 0.28 | 0.73 | 0.20 | 1.70 | |||||||||||||
1959 | 0.20 | 0.20 | 0.10 | 0.15 | 0.70 | 0.85 | 1.94 | 2.06 | 0.90 | 0.95 | 0.25 | 0.20 | 2.06 | |||||||||||||
1960 | 0.15 | 0.05 | 0.05 | 0.45 | 1.20 | 1.35 | 0.55 | 1.15 | 0.75 | 0.55 | 0.70 | 0.95 | 1.35 | |||||||||||||
1961 | 0.15 | 0.15 | 0.42 | 0.45 | 0.65 | 0.57 | 1.71 | 1.20 | 1.62 | 0.36 | 0.25 | 0.20 | 1.71 | |||||||||||||
1962 | 0.15 | 0.45 | 0.10 | 1.30 | 1.84 | 1.20 | a | 2.65 | 1.02 | 1.60 | 0.25 | 0.08 | 0.35 | 2.65 | a | |||||||||||
1963 | 0.07 | 0.15 | 0.15 | 0.95 | 1.55 | 0.85 | 2.35 | 0.70 | 0.50 | 0.28 | 0.60 | 0.35 | 2.35 | |||||||||||||
1964 | 0.15 | 0.15 | 0.22 | 0.90 | 0.90 | 2.13 | 1.00 | 2.00 | 0.66 | 0.09 | 0.66 | 0.36 | 2.13 | |||||||||||||
1965 | 0.10 | 0.12 | 0.40 | 0.47 | 1.65 | 0.57 | 0.80 | 0.82 | 1.05 | 0.98 | 1.04 | 0.50 | 1.65 | |||||||||||||
1966 | 0.18 | b | 0.21 | 1.48 | 0.69 | 0.50 | 0.93 | 4.02 | 2.00 | 0.34 | 1.43 | 0.20 | 0.00 | g | 4.02 | i | ||||||||||
1967 | ----- | z | 0.30 | ----- | z | 1.08 | 0.47 | 1.47 | 0.46 | 0.42 | 0.91 | 0.78 | 0.25 | 1.00 | f | ----- | z | |||||||||
1968 | 0.14 | 0.08 | 0.60 | 0.99 | 0.55 | 0.75 | 1.19 | 1.59 | 1.50 | 0.83 | 0.16 | g | 0.40 | 1.59 | g | |||||||||||
1969 | 0.80 | 0.22 | 0.09 | 0.67 | 1.35 | 0.64 | 2.36 | 2.40 | 0.88 | 2.50 | 0.62 | a | 0.73 | 2.50 | a | |||||||||||
1970 | 0.30 | 0.18 | 1.00 | 0.97 | 0.73 | 1.36 | 1.03 | 1.12 | 1.12 | 0.91 | 0.38 | 0.76 | 1.36 | |||||||||||||
1971 | 0.33 | 0.46 | 0.22 | 0.41 | 1.13 | 0.87 | 0.91 | 0.16 | 0.89 | 2.00 | 0.55 | 0.16 | 2.00 | |||||||||||||
1972 | 0.28 | 0.17 | 0.22 | 1.13 | 0.64 | 0.93 | 1.70 | 0.65 | 0.63 | 0.56 | a | 0.28 | 0.55 | 1.70 | a | |||||||||||
1973 | 0.05 | 0.19 | 0.50 | 0.55 | 1.50 | 0.73 | 1.10 | 1.61 | 2.21 | 0.94 | 0.65 | 0.24 | 2.21 | |||||||||||||
1974 | 0.30 | 0.21 | 0.29 | 1.00 | 1.42 | 2.05 | 0.67 | 2.09 | 0.23 | 1.05 | 1.03 | 0.46 | 2.09 | |||||||||||||
1975 | 0.83 | 0.15 | 0.51 | 0.75 | 0.50 | 1.18 | 1.21 | ----- | z | 0.86 | 0.74 | 0.76 | 0.25 | ----- | z | |||||||||||
1976 | 0.20 | 0.19 | 0.48 | 0.22 | 0.20 | 1.79 | 0.63 | 0.88 | 0.23 | 0.23 | 0.09 | 0.27 | 1.79 | |||||||||||||
1977 | 0.12 | 0.57 | 0.38 | 0.37 | 2.05 | 1.11 | 0.79 | 1.44 | 1.52 | 0.47 | 1.77 | 0.33 | 2.05 | |||||||||||||
1978 | 0.23 | 0.23 | 0.17 | 0.49 | 1.39 | 0.72 | 0.86 | 1.34 | 0.86 | 0.22 | 0.44 | 0.38 | 1.39 | |||||||||||||
1979 | 0.12 | a | 0.45 | 0.69 | 0.78 | 0.85 | 2.71 | 0.77 | 0.59 | 0.60 | 2.72 | 0.35 | a | 0.11 | 2.72 | b | ||||||||||
1980 | 0.42 | b | 0.18 | c | 0.51 | 0.15 | a | 0.32 | 1.21 | 0.78 | 1.50 | 0.88 | 0.71 | 0.60 | 0.14 | 1.50 | f | |||||||||
1981 | 0.06 | 0.07 | 0.60 | 0.62 | 0.45 | 0.90 | 0.82 | 1.14 | 0.90 | 0.66 | 0.11 | 0.21 | c | 1.14 | c | |||||||||||
1982 | 0.44 | a | 0.22 | c | 0.59 | b | 0.39 | 0.70 | a | 0.92 | 0.96 | 0.72 | 0.84 | 0.99 | a | 0.35 | h | 0.09 | a | 0.99 | q | |||||
1983 | 0.16 | 0.45 | b | 0.21 | a | 0.22 | 0.83 | 2.20 | b | 0.98 | a | 1.57 | 1.15 | 1.09 | c | 1.01 | b | 0.36 | 2.20 | k | ||||||
1984 | 0.23 | a | 0.20 | a | 0.17 | 0.57 | 0.75 | 2.11 | 2.05 | 0.82 | 0.47 | a | 2.04 | b | 1.53 | e | 0.30 | 2.11 | j | |||||||
1985 | 0.09 | 0.16 | 0.60 | 1.27 | 2.22 | 2.69 | 1.83 | 1.42 | 1.39 | a | 0.54 | 0.41 | a | 0.22 | a | 2.69 | c | |||||||||
1986 | 0.32 | a | 0.28 | 0.14 | 1.10 | 0.34 | 0.92 | 1.41 | 0.49 | 1.23 | 0.21 | 0.96 | c | 0.14 | a | 1.41 | e | |||||||||
1987 | 0.20 | c | 0.80 | a | 0.54 | 0.39 | 1.48 | 0.20 | 2.42 | 0.55 | 0.78 | 0.46 | 0.50 | 0.15 | a | 2.42 | e | |||||||||
1988 | 0.34 | 0.07 | a | 0.61 | 0.11 | 0.52 | 1.46 | 0.97 | 1.32 | 2.39 | 0.34 | b | 0.55 | 0.47 | a | 2.39 | d | |||||||||
1989 | 0.52 | 0.18 | b | 0.25 | 0.32 | 0.55 | 1.70 | 1.09 | 1.52 | 0.80 | 0.46 | b | 0.37 | 0.10 | a | 1.70 | e | |||||||||
1990 | 0.30 | c | 0.15 | 0.71 | a | 0.55 | 0.78 | 1.70 | 0.56 | 0.71 | 0.30 | 1.20 | 0.10 | a | 0.27 | e | 1.70 | j | ||||||||
1991 | 0.32 | 0.15 | b | 0.50 | 0.80 | 0.79 | 2.25 | a | 0.66 | a | 0.62 | 1.00 | 0.56 | 0.53 | n | 0.28 | a | 2.25 | s | |||||||
1992 | 0.39 | c | 0.28 | a | 0.20 | a | 0.78 | a | 0.55 | 0.57 | 1.09 | 1.21 | a | 0.93 | 0.12 | 0.51 | i | 0.39 | c | 1.21 | s | |||||
1993 | 0.20 | f | 0.05 | 0.16 | b | 0.62 | 1.46 | 0.49 | 3.24 | 1.34 | c | 0.65 | d | 0.51 | f | 0.42 | p | 0.24 | e | ----- | z | |||||
1994 | 0.17 | b | 0.32 | 0.24 | 0.98 | 0.49 | 0.88 | 1.34 | 1.21 | b | 1.02 | 1.27 | c | 1.21 | m | 0.27 | 1.34 | t | ||||||||
1995 | 0.55 | f | 0.26 | c | 0.38 | 0.41 | 0.51 | 1.72 | 1.46 | 1.68 | b | 1.81 | 1.23 | 0.47 | h | 0.54 | a | 1.81 | t | |||||||
1996 | 0.45 | b | 0.48 | b | 0.42 | a | 1.00 | 0.64 | 2.71 | 1.21 | 1.06 | c | 1.02 | d | 1.32 | a | 1.25 | d | 0.39 | c | 2.71 | t | ||||
1997 | 0.31 | 0.09 | 0.41 | a | 1.33 | a | 0.48 | 1.11 | 0.77 | 0.56 | 1.84 | a | 1.26 | 0.79 | e | 0.07 | f | 1.84 | n | |||||||
1998 | 0.22 | d | 0.41 | b | 0.28 | c | 0.78 | 1.89 | 1.46 | 0.90 | 0.53 | i | 0.28 | 1.37 | c | 0.96 | d | 0.31 | d | ----- | z | |||||
1999 | 0.11 | c | 0.23 | a | 1.16 | a | 0.86 | a | 1.50 | d | 0.56 | b | 0.68 | 1.78 | c | 2.53 | d | 0.69 | b | 0.05 | 0.09 | c | 2.53 | x | ||
2000 | 0.16 | 0.20 | 0.62 | c | 0.49 | a | 0.69 | c | 0.89 | b | 1.00 | 2.05 | b | 1.38 | b | 0.46 | b | 0.78 | k | 0.33 | b | ----- | z | |||
2001 | 0.13 | c | 0.63 | b | 0.16 | 1.48 | d | 1.82 | 0.55 | a | 3.35 | c | 0.96 | 0.45 | c | 1.43 | m | 0.69 | e | 0.33 | a | ----- | z | |||
2002 | 0.11 | f | 0.05 | a | 0.41 | a | 0.60 | 0.47 | 1.25 | 1.48 | c | 3.12 | 0.44 | 0.78 | 0.00 | 0.15 | a | 3.12 | l | |||||||
2003 | 0.11 | c | 0.15 | 0.13 | 0.56 | 0.46 | 2.03 | 2.64 | 0.65 | b | 0.43 | 1.00 | a | 0.38 | e | 0.33 | 2.64 | k | ||||||||
2004 | 0.38 | 0.15 | 0.34 | a | 0.48 | 1.23 | 0.50 | 1.88 | a | 0.57 | b | 3.46 | b | 2.66 | 0.21 | b | 0.74 | 3.46 | h | |||||||
2005 | 0.91 | b | 0.20 | a | 0.27 | b | 0.22 | 1.47 | a | 1.02 | c | 1.36 | e | 0.89 | a | 0.57 | c | 1.88 | c | 1.20 | c | 0.19 | h | ----- | z | |
2006 | 0.15 | e | 0.41 | b | 0.89 | 0.59 | a | 0.65 | 1.10 | a | 1.10 | c | 1.71 | 0.54 | 0.81 | b | 0.75 | c | 0.44 | e | 1.71 | v | ||||
2007 | 0.09 | b | 0.71 | b | 0.44 | 0.72 | 0.79 | 1.03 | 1.27 | b | 0.42 | 1.21 | 1.11 | 0.22 | 0.64 | b | 1.27 | h | ||||||||
2008 | 0.16 | a | 0.11 | 0.18 | 0.96 | 1.02 | 1.04 | 1.67 | 0.52 | 2.25 | 1.04 | 1.03 | b | 0.37 | a | 2.25 | d | |||||||||
2009 | 0.62 | 0.29 | 1.06 | 0.48 | 0.54 | 0.38 | 0.60 | 3.37 | 0.44 | 1.56 | 0.66 | 0.90 | b | 3.37 | b | |||||||||||
2010 | 0.73 | b | 0.12 | a | 0.23 | 0.74 | 1.65 | a | 0.65 | 1.65 | 0.88 | 2.44 | 1.24 | 0.51 | 0.35 | c | 2.44 | g | ||||||||
2011 | 0.53 | k | 0.11 | j | 0.12 | e | 1.59 | c | 0.98 | d | 2.26 | h | 1.42 | v | 0.53 | d | 0.58 | e | 0.36 | i | 0.33 | k | 0.06 | l | ----- | z |
2012 | 0.37 | r | 0.32 | m | 1.56 | e | 0.89 | d | 1.14 | f | 0.50 | j | 2.30 | h | 1.18 | f | 0.35 | q | 0.74 | n | ----- | z | 0.56 | u | ----- | z |
2013 | ----- | z | 0.46 | x | 0.71 | j | 0.59 | j | 1.78 | h | 0.51 | f | 0.89 | 0.75 | g | 0.59 | i | 1.19 | d | 0.48 | y | 2.42 | j | ----- | z | |
2014 | ----- | z | 0.70 | x | ----- | z | 1.05 | x | 0.71 | t | 5.10 | t | 0.81 | u | 0.65 | x | 0.50 | w | 0.44 | v | 0.20 | u | ----- | z | ----- | z |
2015 | ----- | z | 0.49 | v | 0.15 | y | 0.21 | u | 1.74 | r | 2.38 | u | 2.52 | w | 2.32 | w | 2.75 | 1.12 | a | 0.78 | 0.48 | ----- | z | |||
2016 | 0.17 | ----- | z | 0.83 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.61 | s | 0.39 | d | 0.29 | ----- | z | |||
2017 | 0.59 | i | 0.43 | h | 0.30 | h | 0.44 | 0.40 | 1.48 | d | 0.98 | h | 1.19 | h | 0.69 | j | 0.54 | r | 0.56 | h | 0.30 | m | ----- | z | ||
2018 | 0.35 | g | 0.28 | t | 0.27 | h | 0.09 | b | 0.90 | h | 2.95 | k | 1.50 | a | 0.31 | a | 2.32 | h | 1.84 | m | 0.25 | i | 0.53 | e | ----- | z |
2019 | 0.21 | d | 0.34 | e | 0.55 | d | 0.51 | c | 0.54 | c | 0.45 | f | 0.78 | b | 0.44 | g | 1.19 | f | 1.13 | f | 0.53 | g | 0.69 | e | ----- | z |
2020 | 0.53 | e | 0.04 | d | 0.18 | a | 0.44 | c | 0.34 | 1.10 | a | 1.13 | c | 1.61 | f | 0.45 | f | 0.88 | j | 0.23 | f | 0.29 | e | ----- | z | |
2021 | 0.36 | i | 0.04 | 0.16 | a | 1.22 | d | 0.66 | d | 0.51 | b | 0.31 | 1.60 | a | 0.92 | c | 2.32 | g | 1.05 | f | 0.56 | h | ----- | z | ||
2022 | 0.20 | g | 0.21 | e | 0.44 | d | 2.78 | i | 1.85 | e | 1.03 | g | 0.91 | 3.12 | g | 0.91 | i | 0.37 | d | 0.40 | d | 0.47 | h | ----- | z | |
2023 | 0.06 | g | 0.32 | g | 0.65 | g | 0.70 | e | 1.14 | a | 0.97 | i | 0.46 | l | 1.23 | f | 1.25 | g | 1.08 | b | 0.39 | n | 1.07 | f | ----- | z |
2024 | 0.30 | g | 0.35 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.28 | 0.24 | 0.43 | 0.66 | 0.91 | 1.18 | 1.26 | 1.24 | 1.04 | 0.86 | 0.55 | 0.32 | 2.03 | |||||||||||||
S.D. | 0.21 | 0.17 | 0.32 | 0.35 | 0.51 | 0.60 | 0.75 | 0.78 | 0.67 | 0.58 | 0.36 | 0.20 | 0.59 | |||||||||||||
SKEW | 1.67 | 1.45 | 1.63 | 0.86 | 0.78 | 0.87 | 1.22 | 0.99 | 1.19 | 1.17 | 0.92 | 1.02 | 0.59 | |||||||||||||
MAX | 1.10 | 0.80 | 1.56 | 1.83 | 2.22 | 2.75 | 4.02 | 3.90 | 3.46 | 2.72 | 1.77 | 0.95 | 3.90 | |||||||||||||
MIN | 0.01 | 0.03 | 0.05 | 0.09 | 0.20 | 0.20 | 0.02 | 0.10 | 0.10 | 0.09 | 0.00 | 0.02 | 0.95 | |||||||||||||
YRS | 79 | 83 | 86 | 87 | 86 | 82 | 86 | 81 | 83 | 82 | 76 | 82 | 47 |