YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | 0.14 | 0.69 | 0.18 | 0.07 | 0.07 | 0.65 | 0.01 | 0.45 | ----- | z | ||||||||
1940 | 0.33 | 0.42 | 0.52 | 0.17 | 0.05 | 0.19 | 0.12 | 0.02 | 0.77 | 0.67 | 0.30 | 0.09 | 0.77 | |||||||||||||
1941 | 0.17 | 0.27 | 0.16 | 0.47 | 0.40 | a | 1.40 | 0.56 | 0.32 | 0.34 | 0.65 | 0.22 | 0.30 | 1.40 | a | |||||||||||
1942 | 0.31 | 0.41 | 0.25 | 0.54 | 0.37 | 0.54 | 0.00 | 0.19 | 0.24 | 0.16 | 0.39 | 0.20 | 0.54 | |||||||||||||
1943 | 0.26 | 0.27 | 0.29 | 0.20 | 2.36 | 0.43 | 0.15 | 0.00 | 0.00 | 0.42 | 0.07 | 0.06 | 2.36 | |||||||||||||
1944 | 0.20 | 0.11 | 0.16 | 0.26 | 0.57 | 0.86 | 0.16 | 0.23 | 0.52 | 0.35 | 0.48 | b | 0.00 | p | 0.86 | r | ||||||||||
1945 | 0.17 | 0.27 | 0.31 | 0.15 | 0.63 | 0.39 | 0.00 | 0.00 | 0.12 | 0.37 | 0.31 | 0.07 | 0.63 | |||||||||||||
1946 | 0.12 | 0.07 | 0.31 | 0.16 | 0.20 | 0.56 | 0.24 | 0.43 | 0.30 | k | 0.65 | 0.82 | 0.25 | 0.82 | k | |||||||||||
1947 | 0.10 | 0.14 | 0.28 | 0.15 | f | 0.95 | 0.58 | 0.00 | 0.00 | 0.18 | 0.30 | 0.30 | 0.16 | 0.95 | f | |||||||||||
1948 | 0.41 | 0.15 | 0.17 | 0.25 | 1.37 | 0.93 | 0.45 | 0.37 | 0.53 | 0.12 | 0.30 | 0.26 | 1.37 | |||||||||||||
1949 | 0.15 | 0.60 | 0.57 | 0.38 | 0.43 | 0.29 | 0.42 | 0.02 | 0.10 | 0.20 | 0.33 | 0.50 | 0.60 | |||||||||||||
1950 | 0.26 | 0.14 | a | 0.35 | b | 0.37 | 0.25 | 0.51 | a | 0.05 | 0.35 | 0.16 | 0.60 | a | 0.21 | 0.61 | 0.61 | e | ||||||||
1951 | 0.33 | 0.20 | 0.50 | 0.10 | 0.37 | 0.07 | 0.01 | 0.24 | 0.07 | 0.39 | 0.30 | 0.56 | 0.56 | |||||||||||||
1952 | 0.39 | 0.37 | 0.51 | 0.24 | 0.27 | 0.44 | 0.20 | 0.52 | 0.59 | 0.00 | 1.01 | 0.12 | 1.01 | |||||||||||||
1953 | 0.16 | 0.36 | 0.54 | 0.26 | 0.96 | 0.40 | 0.00 | 0.31 | 0.01 | 0.22 | 0.37 | 0.36 | 0.96 | |||||||||||||
1954 | 0.26 | p | 0.18 | 0.27 | a | 0.21 | 0.70 | 1.18 | 0.03 | 0.14 | 0.06 | 0.21 | 0.34 | 0.17 | 1.18 | q | ||||||||||
1955 | 0.50 | 0.14 | 0.20 | 0.53 | 2.86 | 0.52 | 0.44 | 0.00 | 0.23 | 0.23 | 0.32 | 0.72 | a | 2.86 | a | |||||||||||
1956 | 0.24 | 0.13 | 0.13 | 0.29 | 0.40 | 0.56 | 0.35 | 0.10 | 0.10 | 0.92 | a | 0.14 | 0.22 | 0.92 | a | |||||||||||
1957 | 0.10 | 0.54 | 0.23 | 0.46 | 1.16 | 0.14 | 0.25 | 0.00 | 0.12 | 0.62 | 0.41 | 0.27 | 1.16 | |||||||||||||
1958 | 0.70 | 0.40 | 0.17 | 0.41 | 0.53 | 1.34 | 0.84 | 0.74 | 0.35 | 0.10 | 0.30 | 0.19 | 1.34 | |||||||||||||
1959 | 0.17 | 0.23 | 0.11 | 0.25 | 0.72 | 0.12 | 0.00 | 0.07 | 0.23 | 0.53 | 0.05 | 0.32 | 0.72 | |||||||||||||
1960 | 0.21 | 0.81 | 0.16 | 0.38 | 0.51 | 0.00 | 0.24 | 0.22 | 0.00 | 0.29 | 0.70 | 0.23 | 0.81 | |||||||||||||
1961 | 0.28 | 0.24 | 0.43 | 0.40 | 0.40 | 0.14 | 0.12 | 0.25 | 0.59 | 0.29 | 0.43 | 0.17 | 0.59 | |||||||||||||
1962 | 0.20 | 0.72 | 0.37 | 0.16 | a | 0.84 | 0.09 | 0.00 | 0.24 | 0.17 | 1.60 | 0.42 | 0.15 | 1.60 | a | |||||||||||
1963 | 0.41 | 0.48 | 0.37 | 0.60 | 0.71 | 0.97 | 0.19 | 0.21 | 0.41 | 0.22 | 0.41 | 0.42 | 0.97 | |||||||||||||
1964 | 0.54 | 0.12 | 0.29 | 0.67 | 1.13 | 0.92 | 0.35 | 0.47 | 0.05 | 0.20 | 0.26 | 1.30 | 1.30 | |||||||||||||
1965 | 0.25 | 0.06 | 0.18 | 0.14 | 0.83 | 0.85 | 0.27 | 0.63 | 0.07 | 0.07 | 0.30 | 0.24 | 0.85 | |||||||||||||
1966 | 0.23 | 0.28 | 0.33 | 0.23 | 1.23 | 0.20 | 0.37 | 0.09 | 1.36 | 0.00 | 0.78 | 0.32 | 1.36 | |||||||||||||
1967 | 0.23 | 0.19 | 0.29 | 0.35 | 0.30 | 0.22 | 0.23 | 0.10 | 0.41 | 0.43 | 0.19 | 0.13 | 0.43 | |||||||||||||
1968 | 0.28 | 0.20 | 0.18 | 0.70 | 0.33 | 0.16 | 0.00 | 0.73 | 0.06 | 0.22 | 0.42 | 0.29 | 0.73 | |||||||||||||
1969 | 0.65 | 0.22 | 0.66 | 0.32 | 0.24 | 0.54 | 0.04 | 0.00 | 0.77 | 0.49 | 0.40 | 1.06 | 1.06 | |||||||||||||
1970 | 0.39 | c | 0.21 | 0.34 | 0.24 | 0.30 | 0.99 | 0.03 | 0.00 | 0.45 | 0.32 | 0.31 | 0.60 | 0.99 | c | |||||||||||
1971 | 0.20 | 0.19 | 0.66 | 0.44 | 0.43 | 0.27 | 0.36 | 0.00 | 0.85 | 0.12 | 0.20 | 0.46 | 0.85 | |||||||||||||
1972 | 0.86 | a | 0.33 | 0.18 | 0.23 | 0.17 | 0.05 | 0.02 | 0.21 | 0.34 | 0.34 | 0.21 | 0.23 | d | 0.86 | e | ||||||||||
1973 | 0.15 | 0.10 | 0.33 | 0.77 | 0.70 | 0.06 | 0.04 | 0.49 | 0.63 | a | 0.47 | 0.57 | ----- | z | ----- | z | ||||||||||
1974 | 0.25 | d | 0.06 | 0.45 | 0.17 | 0.20 | 0.11 | 0.44 | 0.10 | 0.00 | 0.35 | 0.05 | 0.20 | 0.45 | d | |||||||||||
1975 | 0.31 | 0.21 | 0.53 | 0.30 | 0.26 | 2.21 | 0.82 | 0.10 | 0.36 | 2.00 | 0.30 | 0.24 | 2.21 | |||||||||||||
1976 | 0.12 | 0.46 | 0.31 | 0.26 | 0.10 | 0.29 | 0.22 | 0.34 | 0.31 | 0.18 | 0.00 | 0.25 | 0.46 | |||||||||||||
1977 | 0.30 | 0.28 | 0.11 | 0.23 | 0.31 | 0.09 | 0.24 | 0.27 | 0.74 | 0.13 | 0.55 | 0.61 | 0.74 | |||||||||||||
1978 | 0.22 | 0.07 | 0.15 | 2.80 | 0.38 | 0.40 | 0.13 | 0.34 | 0.20 | 0.25 | 0.97 | 0.18 | 2.80 | |||||||||||||
1979 | 1.20 | b | 0.60 | a | 0.63 | a | 0.72 | 0.38 | 1.10 | 0.23 | 0.58 | 0.08 | 0.34 | 0.17 | a | 0.13 | a | 1.20 | f | |||||||
1980 | 0.35 | 0.33 | 0.50 | 0.22 | 0.45 | 0.43 | 0.09 | 0.03 | 0.66 | 0.45 | 0.43 | 0.20 | 0.66 | |||||||||||||
1981 | 0.51 | 0.15 | 0.73 | 0.65 | 1.53 | 0.88 | 0.58 | 0.00 | 0.30 | 0.61 | 1.56 | a | 0.92 | 1.56 | a | |||||||||||
1982 | 0.35 | b | 0.52 | 0.61 | o | 0.40 | a | 0.35 | y | 0.51 | 0.77 | 0.07 | 0.75 | 0.31 | 0.27 | a | 0.45 | a | ----- | z | ||||||
1983 | 0.35 | a | 0.19 | 0.78 | 0.74 | 0.54 | 0.33 | 0.46 | a | 0.58 | 0.04 | 0.28 | 0.29 | a | 1.22 | 1.22 | c | |||||||||
1984 | 0.05 | 0.53 | a | 1.01 | 0.34 | 0.23 | 0.31 | 0.21 | 1.27 | 0.31 | 0.51 | 0.36 | 0.17 | 1.27 | a | |||||||||||
1985 | 0.13 | 0.40 | 0.32 | 0.34 | 0.47 | 0.12 | 0.15 | 0.03 | 0.79 | 0.38 | 0.35 | 0.22 | 0.79 | |||||||||||||
1986 | 0.14 | 0.53 | 0.74 | 0.28 | 0.91 | 0.62 | 0.14 | 0.01 | 0.68 | 0.17 | 0.33 | ----- | z | ----- | z | |||||||||||
1987 | 0.25 | 0.27 | b | 0.53 | 0.32 | a | 0.98 | 0.66 | 0.40 | 0.20 | 0.00 | 0.09 | a | 0.38 | a | 0.45 | c | 0.98 | h | |||||||
1988 | 0.22 | 0.02 | 0.22 | b | 1.10 | 0.42 | 0.12 | 0.03 | 0.43 | 0.60 | 0.00 | 0.49 | a | 0.20 | 1.10 | c | ||||||||||
1989 | 0.43 | 0.23 | 0.23 | 0.15 | 0.48 | 0.09 | 0.09 | 0.44 | 0.54 | a | 0.29 | c | 0.31 | 0.11 | 0.54 | d | ||||||||||
1990 | 0.38 | a | 0.09 | c | 0.40 | 0.35 | 0.21 | 0.13 | 0.12 | 0.84 | 0.10 | 0.34 | a | 0.25 | a | 0.30 | c | 0.84 | i | |||||||
1991 | 0.21 | 0.29 | 0.46 | 0.41 | 1.95 | 0.80 | 0.00 | a | 0.19 | 0.01 | 0.72 | 0.58 | 0.19 | a | 1.95 | b | ||||||||||
1992 | 0.50 | 0.13 | 0.74 | 0.24 | 0.45 | 0.35 | 0.32 | 0.03 | 0.72 | 0.89 | 0.70 | a | 0.46 | a | 0.89 | b | ||||||||||
1993 | 0.78 | b | 0.35 | 0.15 | a | 0.54 | a | 0.50 | 0.99 | 0.93 | 0.35 | 0.57 | 0.29 | 0.42 | 0.27 | 0.99 | d | |||||||||
1994 | 0.04 | 0.57 | a | 0.27 | 0.58 | 0.73 | 0.46 | 0.12 | 0.51 | 0.00 | 0.39 | 0.47 | b | 0.30 | 0.73 | c | ||||||||||
1995 | 0.21 | 0.42 | 0.45 | d | 0.40 | 1.44 | 0.48 | a | 0.40 | a | 0.18 | 0.30 | 0.22 | 0.75 | 0.97 | a | 1.44 | g | ||||||||
1996 | 0.55 | 0.47 | a | 0.78 | 0.67 | 0.52 | 1.05 | 0.07 | 0.14 | a | 0.43 | 0.45 | 0.41 | a | 0.50 | 1.05 | c | |||||||||
1997 | 0.56 | a | 0.26 | 0.32 | c | 0.53 | b | 0.47 | 0.52 | a | 0.35 | 0.10 | a | 0.09 | 0.36 | 0.44 | c | 0.51 | b | 0.56 | m | |||||
1998 | 0.30 | a | 0.38 | c | 0.41 | a | 0.36 | a | 1.87 | e | 0.42 | a | 0.29 | 0.00 | 0.60 | 0.53 | b | 0.43 | b | 0.80 | a | 1.87 | q | |||
1999 | 0.52 | c | 1.12 | g | 0.54 | b | 0.64 | h | 0.50 | b | 0.46 | c | 0.03 | 0.58 | g | 0.00 | 0.45 | 0.14 | 0.08 | d | ----- | z | ||||
2000 | 0.30 | l | 0.23 | d | 0.81 | 0.38 | f | 0.47 | 0.16 | 0.05 | 0.00 | 0.69 | a | 1.33 | g | 0.27 | g | 0.50 | b | ----- | z | |||||
2001 | 0.20 | a | 0.18 | b | 0.18 | a | 0.57 | a | 0.03 | 0.18 | 1.65 | 0.41 | 0.35 | d | 0.28 | e | 0.83 | b | 0.32 | v | ----- | z | ||||
2002 | 0.27 | c | 0.32 | a | 0.34 | c | 0.51 | d | 0.25 | 0.21 | 0.00 | 0.13 | 0.34 | 0.48 | 0.25 | 0.25 | a | 0.51 | l | |||||||
2003 | 0.23 | a | 0.63 | a | 0.73 | 0.70 | 1.31 | 0.27 | 0.07 | 0.23 | 0.52 | 0.20 | 0.31 | a | 0.44 | g | 1.31 | j | ||||||||
2004 | 0.16 | 0.16 | 0.11 | 0.56 | 0.55 | 0.30 | 0.09 | 0.60 | 0.94 | 0.55 | 0.66 | 0.41 | m | 0.94 | m | |||||||||||
2005 | 0.36 | c | 0.32 | 0.60 | 0.42 | c | 2.09 | e | 0.19 | d | 0.00 | 0.00 | 0.20 | d | 0.70 | f | 0.80 | r | 0.22 | q | ----- | z | ||||
2006 | 0.32 | n | 0.39 | j | 0.48 | h | 0.52 | g | 0.22 | c | 0.87 | 0.50 | b | 0.00 | 0.21 | ----- | z | 0.40 | e | 0.12 | k | ----- | z | |||
2007 | 0.28 | b | 0.27 | b | 0.09 | f | 0.56 | f | 0.11 | b | 1.02 | d | 0.17 | 0.10 | ----- | z | 0.70 | b | 0.24 | e | 0.50 | n | ----- | z | ||
2008 | 0.59 | d | 0.34 | 0.40 | e | 0.27 | a | 0.59 | 0.33 | a | 0.34 | 0.00 | 0.33 | b | 0.48 | 0.16 | c | 0.40 | m | ----- | z | |||||
2009 | 0.22 | j | 0.39 | a | 0.23 | i | 0.59 | e | 0.51 | e | 0.83 | c | 0.02 | e | 0.43 | 0.00 | 0.55 | b | 1.30 | f | 0.22 | l | ----- | z | ||
2010 | 0.14 | r | 0.13 | i | 0.61 | g | 1.52 | f | 0.89 | e | 0.15 | g | 0.00 | b | 0.22 | d | 0.40 | c | 0.50 | l | 0.53 | l | 0.73 | l | ----- | z |
2011 | 0.25 | k | 0.56 | g | 0.54 | c | 0.53 | 1.00 | 0.36 | 0.07 | 0.00 | 0.00 | 0.19 | 0.53 | 0.11 | 1.00 | u | |||||||||
2012 | 0.28 | 0.24 | 0.32 | 0.43 | 0.68 | 0.70 | 0.00 | 0.00 | 0.01 | 0.21 | 0.46 | 0.40 | 0.70 | |||||||||||||
2013 | 0.56 | 0.19 | 0.08 | 0.42 | 0.80 | 0.42 | 0.49 | 0.82 | 0.80 | 0.48 | 0.15 | 0.08 | 0.82 | |||||||||||||
2014 | 0.18 | 0.55 | 0.25 | 0.60 | 0.24 | 0.17 | 0.09 | 0.31 | 0.63 | 0.17 | 0.95 | 0.78 | 0.95 | |||||||||||||
2015 | 0.08 | 0.61 | 0.26 | 0.40 | 0.94 | 0.11 | 0.97 | 0.02 | 0.47 | 0.25 | 0.86 | 0.64 | 0.97 | |||||||||||||
2016 | 0.19 | 0.15 | a | 0.28 | 0.51 | 0.61 | 0.14 | 0.18 | 0.02 | 1.23 | 0.38 | 0.13 | 0.50 | 1.23 | a | |||||||||||
2017 | 0.98 | ----- | z | ----- | z | 0.75 | l | 0.42 | o | 1.96 | g | 0.00 | 0.00 | 0.00 | r | ----- | z | ----- | z | ----- | z | ----- | z | |||
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | 1.10 | j | 1.15 | d | 0.00 | s | 0.00 | 0.10 | a | 0.65 | b | 0.00 | 0.00 | 0.00 | c | ----- | z | |||
2020 | 1.40 | 4.00 | d | 0.40 | i | 0.25 | h | 0.48 | m | 1.10 | o | 0.03 | p | 0.02 | j | 0.00 | g | 0.45 | n | 0.39 | m | 0.80 | s | ----- | z | |
2021 | 0.72 | p | 0.27 | n | 0.28 | j | 1.10 | p | 1.34 | t | 0.55 | v | 0.00 | l | 0.10 | k | 0.53 | k | 0.67 | n | 0.40 | s | 0.40 | v | ----- | z |
2022 | 0.52 | u | 0.30 | p | 0.33 | r | 0.76 | u | 0.80 | x | 0.93 | k | ----- | z | ----- | z | 1.07 | a | 0.00 | 0.49 | r | 0.70 | g | ----- | z | |
2023 | 0.27 | j | 0.11 | g | 0.79 | e | 0.54 | g | 1.55 | 0.66 | f | 0.00 | 0.26 | b | 0.40 | b | 0.55 | f | 0.16 | c | 0.30 | e | ----- | z | ||
2024 | 0.37 | h | 0.24 | e | 0.28 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.34 | 0.35 | 0.39 | 0.44 | 0.68 | 0.49 | 0.24 | 0.23 | 0.37 | 0.39 | 0.40 | 0.37 | 1.08 | |||||||||||||
S.D. | 0.25 | 0.46 | 0.21 | 0.34 | 0.54 | 0.39 | 0.28 | 0.25 | 0.31 | 0.31 | 0.26 | 0.28 | 0.56 | |||||||||||||
SKEW | 2.05 | 6.78 | 0.75 | 4.80 | 1.72 | 1.50 | 2.27 | 1.48 | 0.80 | 2.62 | 1.56 | 1.47 | 1.64 | |||||||||||||
MAX | 1.40 | 4.00 | 1.01 | 2.80 | 2.86 | 2.21 | 1.65 | 1.27 | 1.36 | 2.00 | 1.56 | 1.30 | 2.86 | |||||||||||||
MIN | 0.04 | 0.02 | 0.08 | 0.10 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.43 | |||||||||||||
YRS | 73 | 75 | 73 | 71 | 79 | 77 | 81 | 80 | 79 | 76 | 76 | 68 | 49 |