YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.28 | 0.68 | ----- | z | ||
1941 | 0.32 | 0.23 | a | 1.01 | 0.44 | l | 0.28 | 0.20 | 0.41 | 0.40 | 0.50 | 0.62 | a | 0.39 | 0.23 | 1.01 | n | |||||||||
1942 | 0.47 | 0.26 | 0.58 | 0.49 | q | 0.21 | 0.87 | 0.72 | 0.59 | 0.27 | 0.48 | 0.55 | 0.65 | 0.87 | q | |||||||||||
1943 | 0.85 | 0.10 | a | 1.25 | a | 0.20 | 0.40 | 0.75 | 0.60 | 0.65 | 0.60 | 0.35 | 0.04 | 0.05 | a | 1.25 | c | |||||||||
1944 | 0.60 | 0.65 | 0.73 | 0.45 | 0.40 | 0.20 | 0.25 | 0.30 | 0.10 | 0.65 | 0.45 | 0.40 | 0.73 | |||||||||||||
1945 | 0.20 | 0.45 | 0.35 | 0.40 | 0.15 | 0.30 | 1.00 | 0.65 | 0.50 | 0.20 | 0.25 | a | 0.40 | 1.00 | a | |||||||||||
1946 | 0.23 | 0.15 | 0.30 | 0.60 | 0.45 | 0.25 | 0.95 | 0.25 | 0.25 | 0.70 | 0.45 | 0.20 | 0.95 | |||||||||||||
1947 | 0.20 | 0.35 | 0.20 | 0.25 | 0.45 | 0.70 | 0.40 | 0.45 | 0.65 | 0.50 | 0.10 | 0.15 | 0.70 | |||||||||||||
1948 | 0.50 | 0.45 | 0.40 | 0.80 | 0.25 | 0.35 | 0.25 | 0.35 | 0.05 | 0.65 | 0.40 | 0.35 | 0.80 | |||||||||||||
1949 | 0.35 | 0.35 | 0.20 | 0.30 | 0.50 | 0.90 | 0.50 | 0.20 | 0.30 | 0.35 | 0.30 | 0.35 | 0.90 | |||||||||||||
1950 | 0.40 | 0.30 | 0.30 | 0.25 | 0.30 | 0.10 | 0.25 | 0.05 | 0.60 | 0.15 | 0.70 | 0.55 | 0.70 | |||||||||||||
1951 | 0.35 | 0.25 | 0.35 | 0.20 | 0.15 | 0.15 | 0.60 | 0.40 | 0.20 | 0.35 | 0.45 | 1.05 | 1.05 | |||||||||||||
1952 | 0.40 | 0.30 | 0.40 | 0.40 | 0.25 | 0.35 | 0.40 | 0.50 | 0.75 | 0.00 | 0.25 | 0.45 | 0.75 | |||||||||||||
1953 | 0.40 | 0.25 | a | 0.45 | 0.25 | 0.50 | 0.65 | 0.50 | 0.40 | 0.05 | 1.00 | 0.50 | 0.15 | 1.00 | a | |||||||||||
1954 | 0.25 | 0.50 | 0.25 | 0.25 | 0.50 | 0.20 | 0.50 | 0.15 | 0.20 | 0.15 | 0.70 | 0.80 | 0.80 | |||||||||||||
1955 | 0.30 | 0.30 | 0.55 | 0.20 | 0.35 | 0.25 | 0.75 | 1.20 | 0.10 | 0.45 | 0.70 | 0.45 | 1.20 | |||||||||||||
1956 | 0.60 | 0.25 | 0.40 | 0.65 | 0.25 | 0.50 | 0.25 | 0.30 | 0.30 | 0.80 | 0.45 | 0.25 | 0.80 | |||||||||||||
1957 | 0.95 | 0.50 | 0.25 | 0.55 | 0.80 | 0.50 | 0.45 | 0.50 | 0.05 | 0.25 | 0.25 | 0.30 | 0.95 | |||||||||||||
1958 | 0.20 | 0.30 | 0.80 | 0.65 | 0.15 | 0.05 | 0.45 | 0.45 | 0.60 | 0.20 | 0.30 | 0.40 | 0.80 | |||||||||||||
1959 | 0.15 | 0.50 | 0.20 | 0.50 | 0.20 | 0.35 | 0.45 | 0.35 | 0.70 | 0.55 | 0.35 | 0.15 | 0.70 | |||||||||||||
1960 | 0.15 | 0.65 | 0.35 | 0.70 | 0.20 | 0.10 | 0.40 | 0.20 | 0.30 | 0.25 | 0.50 | 0.30 | 0.70 | |||||||||||||
1961 | 0.15 | 0.25 | 0.35 | 0.50 | 0.35 | 0.10 | 0.17 | 0.40 | 1.05 | 0.85 | 0.50 | 0.20 | 1.05 | |||||||||||||
1962 | 0.60 | 0.30 | 0.20 | 0.45 | 0.30 | 0.10 | 0.53 | 0.35 | 0.35 | a | 0.70 | 0.40 | 0.35 | a | 0.70 | b | ||||||||||
1963 | 0.35 | 0.80 | 0.30 | 0.20 | 0.35 | 0.50 | 0.35 | 0.90 | 0.30 | 1.15 | 0.10 | 0.45 | 1.15 | |||||||||||||
1964 | 0.15 | 0.25 | 0.45 | a | 0.20 | 0.40 | 0.25 | 0.55 | 0.55 | 0.15 | 0.05 | 0.55 | 0.95 | 0.95 | a | |||||||||||
1965 | 0.25 | 0.30 | 0.65 | 0.60 | 0.30 | 1.30 | 0.70 | 0.40 | 0.45 | 0.60 | 0.95 | 0.30 | 1.30 | |||||||||||||
1966 | 0.15 | 0.20 | 0.20 | 0.40 | 0.60 | 0.30 | 0.25 | 0.50 | 0.35 | 0.30 | 0.60 | 0.95 | a | 0.95 | a | |||||||||||
1967 | 0.80 | 0.25 | 0.25 | 0.10 | 0.50 | 0.60 | 0.40 | 0.70 | 0.80 | 0.10 | 0.20 | 0.55 | 0.80 | |||||||||||||
1968 | 0.25 | 0.30 | 0.20 | 0.35 | 0.40 | 0.10 | 0.45 | 1.25 | 0.40 | 0.55 | 0.30 | 0.35 | 1.25 | |||||||||||||
1969 | 0.75 | 0.35 | 0.40 | 0.15 | 0.75 | 0.95 | 0.35 | 0.40 | 0.45 | 1.25 | 0.25 | 0.40 | 1.25 | |||||||||||||
1970 | 0.30 | 0.10 | 0.35 | 0.25 | 0.05 | 0.45 | 0.30 | 0.75 | 1.15 | 0.50 | 0.45 | 0.25 | 1.15 | |||||||||||||
1971 | 0.30 | 0.30 | 0.40 | 0.30 | 0.45 | 0.05 | 0.60 | 0.40 | 0.65 | 0.75 | 0.20 | 0.70 | 0.75 | |||||||||||||
1972 | 0.45 | 0.30 | 0.50 | 0.50 | 0.50 | 0.30 | 0.10 | 0.35 | 0.65 | 0.65 | 0.40 | 0.50 | 0.65 | |||||||||||||
1973 | 0.10 | 0.15 | 0.30 | 0.55 | 0.50 | 0.35 | 0.45 | 0.40 | 0.35 | 0.05 | 0.15 | 0.55 | 0.55 | |||||||||||||
1974 | 1.10 | 0.15 | 0.30 | 0.50 | 0.05 | 0.50 | 0.40 | 0.15 | 0.55 | 0.40 | 0.30 | 0.20 | 1.10 | |||||||||||||
1975 | 0.30 | 0.70 | 0.20 | 0.25 | 0.35 | 0.25 | 0.25 | 0.60 | 0.40 | 0.25 | 0.35 | 0.25 | 0.70 | |||||||||||||
1976 | 0.35 | 0.60 | 0.30 | 0.40 | 0.25 | 0.25 | 0.60 | 0.30 | 0.55 | 0.20 | 0.15 | 0.05 | 0.60 | |||||||||||||
1977 | 0.10 | 0.15 | 0.20 | 0.35 | 0.50 | 0.35 | 1.25 | 0.60 | 0.20 | 0.65 | 0.20 | 0.65 | 1.25 | |||||||||||||
1978 | 0.35 | 0.25 | 0.80 | 0.40 | 0.65 | 0.30 | 0.35 | 0.30 | 0.20 | 0.40 | 0.20 | 0.95 | 0.95 | |||||||||||||
1979 | 0.50 | 0.50 | 0.35 | 0.15 | 0.60 | 0.85 | 0.50 | 0.50 | 0.05 | 0.65 | 0.40 | 0.15 | 0.85 | |||||||||||||
1980 | 0.75 | 0.60 | 0.35 | 0.15 | a | 0.45 | 0.00 | 0.40 | 0.40 | 0.50 | 0.60 | 0.25 | 0.25 | 0.75 | a | |||||||||||
1981 | 0.25 | 1.30 | 0.65 | 0.30 | 0.55 | 0.10 | 1.30 | 0.40 | 0.30 | 0.40 | 0.10 | 0.65 | 1.30 | |||||||||||||
1982 | 0.60 | 0.25 | 0.95 | 0.60 | 0.35 | 0.30 | 0.50 | 0.85 | 0.95 | 0.40 | 0.30 | 0.25 | 0.95 | |||||||||||||
1983 | 0.10 | 0.40 | 0.40 | a | 0.35 | 0.35 | 0.50 | 0.65 | 0.40 | 0.25 | 0.35 | 0.50 | 0.55 | 0.65 | a | |||||||||||
1984 | 0.25 | 0.30 | 0.15 | 0.20 | 0.40 | ----- | z | 0.45 | 0.65 | 0.25 | 0.65 | 0.25 | 0.40 | ----- | z | |||||||||||
1985 | 0.35 | 0.25 | 0.65 | 0.40 | 0.35 | 0.20 | ----- | z | 0.50 | 0.55 | 0.60 | 0.45 | 0.35 | ----- | z | |||||||||||
1986 | 0.10 | 0.70 | 0.15 | 0.45 | 0.40 | 0.40 | 0.50 | 0.35 | 0.70 | 0.65 | 0.95 | 0.30 | 0.95 | |||||||||||||
1987 | 0.30 | 0.50 | 0.35 | 0.45 | 1.05 | 0.50 | ----- | z | 0.60 | 0.20 | 0.35 | 0.25 | 0.25 | ----- | z | |||||||||||
1988 | 0.40 | 0.40 | 0.10 | 0.70 | 0.20 | 0.35 | 0.65 | 0.50 | 0.85 | 0.25 | 0.50 | 0.40 | 0.85 | |||||||||||||
1989 | 0.25 | 0.75 | 0.75 | 0.70 | 0.45 | 0.55 | 0.40 | 0.25 | 0.75 | 0.50 | 0.35 | 0.20 | 0.75 | |||||||||||||
1990 | 0.15 | 0.30 | 0.25 | 0.85 | 0.40 | 0.50 | 0.60 | 0.50 | 0.95 | 0.80 | 0.40 | 0.20 | 0.95 | |||||||||||||
1991 | 0.20 | 0.30 | 0.75 | 0.30 | 0.20 | 0.50 | 0.30 | 0.35 | 0.30 | 0.40 | 0.90 | 0.10 | 0.90 | |||||||||||||
1992 | 0.10 | 0.15 | 0.45 | 0.40 | 0.65 | 0.40 | 0.80 | 1.25 | 0.35 | 0.40 | 0.45 | 0.40 | 1.25 | |||||||||||||
1993 | 0.35 | 0.75 | 0.90 | 0.45 | 0.40 | 0.45 | 0.50 | 0.30 | 0.45 | 0.40 | 0.45 | 0.20 | 0.90 | |||||||||||||
1994 | 0.15 | 0.75 | 0.25 | 0.65 | 0.25 | 0.50 | 0.05 | 0.25 | 0.45 | 0.50 | 0.40 | 0.25 | 0.75 | |||||||||||||
1995 | 0.20 | 0.85 | 0.85 | 0.65 | 0.70 | 0.55 | 0.85 | 0.55 | 0.40 | 0.10 | 0.70 | 0.20 | 0.85 | |||||||||||||
1996 | 0.40 | 1.35 | 0.65 | 0.45 | 0.60 | 0.40 | 0.10 | 0.45 | 0.20 | 0.25 | 0.25 | 0.45 | 1.35 | |||||||||||||
1997 | 0.55 | 0.65 | 0.10 | 0.35 | 0.65 | 0.40 | 0.30 | 0.60 | 0.35 | 0.65 | 0.45 | 0.35 | 0.65 | |||||||||||||
1998 | 0.30 | 0.25 | 0.30 | 0.40 | 0.10 | 0.15 | 0.85 | 0.30 | 0.10 | 1.05 | 0.50 | 0.15 | 1.05 | |||||||||||||
1999 | 0.55 | 0.35 | 0.15 | 1.45 | 0.55 | 0.30 | 0.75 | 0.35 | 0.40 | 0.20 | 0.25 | 0.35 | 1.45 | |||||||||||||
2000 | 0.35 | 0.55 | 0.25 | 0.35 | 0.90 | 0.30 | 0.65 | 0.50 | 0.35 | 0.25 | 0.28 | 0.34 | 0.90 | |||||||||||||
2001 | 0.21 | 0.35 | 0.16 | 0.41 | 0.38 | 0.61 | 0.55 | 0.84 | 0.28 | 0.82 | 0.61 | 0.35 | 0.84 | |||||||||||||
2002 | 0.15 | 0.17 | 0.19 | 0.30 | 0.11 | 0.26 | 0.34 | 0.50 | 0.37 | 0.30 | 1.01 | 0.39 | 1.01 | |||||||||||||
2003 | 0.20 | 0.31 | 0.51 | 0.30 | 0.29 | 0.29 | 0.30 | 0.51 | 1.07 | 0.37 | 0.36 | 0.39 | 1.07 | |||||||||||||
2004 | 0.62 | 0.36 | 0.21 | 0.63 | 0.25 | 0.58 | 0.61 | 0.20 | 0.64 | 0.27 | 0.80 | 0.36 | 0.80 | |||||||||||||
2005 | 0.77 | 0.26 | 0.13 | 0.44 | 0.62 | 0.41 | 0.41 | 0.42 | 0.84 | 0.78 | 0.41 | 0.32 | 0.84 | |||||||||||||
2006 | 0.12 | 0.22 | 0.21 | 0.53 | 0.54 | 0.39 | 0.95 | 0.55 | 0.39 | 0.58 | 0.86 | 0.31 | 0.95 | |||||||||||||
2007 | 0.08 | 0.38 | 0.40 | 0.40 | 0.33 | 0.32 | 0.86 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||||||
2008 | ----- | z | ----- | z | 0.50 | 0.72 | 0.87 | 0.15 | 0.83 | 0.35 | 0.60 | 0.25 | 0.45 | 0.80 | b | ----- | z | |||||||||
2009 | 1.47 | a | 1.12 | 0.26 | 0.50 | 0.50 | 0.40 | 0.75 | a | 0.37 | 0.23 | b | 0.47 | 0.22 | 1.80 | 1.80 | d | |||||||||
2010 | 0.25 | 0.60 | 0.45 | a | 0.50 | 0.30 | 0.17 | 0.77 | 0.64 | 0.47 | 1.65 | 0.25 | 0.87 | a | 1.65 | b | ||||||||||
2011 | 0.25 | d | 0.35 | 0.40 | 0.90 | 0.57 | 0.12 | 0.51 | 0.65 | 0.20 | c | 0.85 | 0.53 | e | 0.17 | 0.90 | l | |||||||||
2012 | 0.55 | 0.30 | h | 0.26 | 0.27 | 0.18 | c | 0.20 | 0.72 | 0.66 | 0.72 | 0.60 | 0.40 | 0.34 | b | 0.72 | m | |||||||||
2013 | 0.70 | 0.38 | 0.43 | b | 0.57 | a | 0.35 | 0.27 | a | 0.75 | 0.48 | 0.62 | b | 0.45 | 1.07 | e | 0.76 | a | 1.07 | l | ||||||
2014 | 1.25 | 0.85 | a | 0.65 | 0.23 | 0.55 | 0.13 | 0.97 | 0.58 | 1.53 | 0.45 | 0.57 | f | 1.16 | d | 1.53 | k | |||||||||
2015 | 0.14 | d | 0.58 | e | 0.38 | 0.92 | b | 1.20 | c | 0.37 | 0.37 | 0.56 | 0.39 | 0.41 | 0.36 | 0.57 | b | 1.20 | p | |||||||
2016 | 0.64 | a | 0.81 | 0.27 | b | 0.56 | a | 0.51 | 0.27 | c | 0.90 | a | 0.58 | 0.36 | e | 0.37 | b | 0.40 | 1.24 | e | 1.24 | t | ||||
2017 | 5.55 | c | 0.49 | 0.62 | b | 0.49 | b | 0.49 | b | 0.06 | 0.79 | c | 0.97 | 0.41 | a | 0.87 | b | 1.19 | b | 0.57 | h | 5.55 | y | |||
2018 | 0.33 | a | 0.44 | 0.62 | d | 1.06 | a | 0.22 | a | 0.17 | e | 0.21 | 0.48 | 0.39 | 0.62 | a | 0.58 | e | 0.32 | f | 1.06 | x | ||||
2019 | 0.82 | d | 1.27 | c | 1.62 | e | 0.79 | 0.45 | 0.28 | 0.43 | 0.48 | a | 0.16 | 0.46 | 0.57 | f | 0.72 | j | ----- | z | ||||||
2020 | 0.42 | b | 0.52 | c | 0.29 | a | 0.33 | a | 0.27 | b | 0.55 | 0.69 | d | 0.12 | c | 0.92 | 0.42 | c | 0.79 | d | 0.75 | j | ----- | z | ||
2021 | 0.17 | e | 0.78 | c | 0.53 | b | 0.16 | c | 0.47 | e | 0.88 | f | 0.85 | e | 0.35 | b | 0.28 | c | 0.36 | a | 0.23 | c | 3.15 | o | ----- | z |
2022 | 0.47 | b | 0.19 | 0.55 | 0.35 | a | 0.40 | a | 0.66 | a | 0.46 | e | 0.89 | h | 1.28 | i | 0.64 | b | 0.47 | e | 0.48 | e | ----- | z | ||
2023 | 0.61 | f | 0.24 | e | 1.98 | g | 0.89 | 0.33 | d | 0.51 | a | 0.13 | 0.93 | e | 0.65 | s | 1.03 | c | 0.13 | d | 0.96 | f | ----- | z | ||
2024 | 1.83 | e | 0.41 | f | 0.00 | v | 0.22 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.47 | 0.44 | 0.43 | 0.46 | 0.42 | 0.37 | 0.54 | 0.49 | 0.46 | 0.51 | 0.43 | 0.44 | 0.95 | |||||||||||||
S.D. | 0.65 | 0.27 | 0.27 | 0.23 | 0.21 | 0.23 | 0.25 | 0.23 | 0.28 | 0.29 | 0.24 | 0.30 | 0.25 | |||||||||||||
SKEW | 6.14 | 1.47 | 1.77 | 1.32 | 1.05 | 1.19 | 0.59 | 1.24 | 1.10 | 1.07 | 1.07 | 1.85 | 1.07 | |||||||||||||
MAX | 5.55 | 1.35 | 1.62 | 1.45 | 1.20 | 1.30 | 1.30 | 1.25 | 1.53 | 1.65 | 1.19 | 1.80 | 1.80 | |||||||||||||
MIN | 0.08 | 0.10 | 0.10 | 0.10 | 0.05 | 0.00 | 0.05 | 0.05 | 0.05 | 0.00 | 0.04 | 0.05 | 0.55 | |||||||||||||
YRS | 82 | 81 | 82 | 81 | 83 | 81 | 81 | 81 | 80 | 82 | 81 | 77 | 63 |